./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/lockfree-3.2.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/memsafety/lockfree-3.2.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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/memsafety/lockfree-3.2.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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:21:50,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:21:50,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:21:50,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:21:50,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:21:50,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:21:50,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:21:50,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:21:50,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:21:50,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:21:50,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:21:50,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:21:50,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:21:50,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:21:50,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:21:50,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:21:50,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:21:50,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:21:50,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:21:50,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:21:50,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:21:50,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:21:50,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:21:50,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:21:50,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:21:50,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:21:50,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:21:50,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:21:50,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:21:50,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:21:50,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:21:50,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:21:50,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:21:50,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:21:50,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:21:50,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:21:50,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:21:50,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:21:50,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:21:50,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:21:50,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:21:50,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:21:50,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:21:50,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:21:50,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:21:50,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:21:50,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:21:50,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:21:50,177 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:21:50,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:21:50,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:21:50,177 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:21:50,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:21:50,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:21:50,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:21:50,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:21:50,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:21:50,179 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:21:50,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:21:50,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:21:50,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:21:50,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:21:50,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:21:50,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:21:50,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:21:50,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:21:50,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:21:50,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:21:50,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:21:50,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:21:50,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:21:50,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-08-27 05:21:50,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:21:50,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:21:50,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:21:50,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:21:50,433 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:21:50,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-08-27 05:21:50,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a881d42e3/9d27b10418b54bf583ed59cd87bb2961/FLAGf346c3cda [2021-08-27 05:21:50,871 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:21:50,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-08-27 05:21:50,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a881d42e3/9d27b10418b54bf583ed59cd87bb2961/FLAGf346c3cda [2021-08-27 05:21:50,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a881d42e3/9d27b10418b54bf583ed59cd87bb2961 [2021-08-27 05:21:50,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:21:50,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:21:50,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:21:50,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:21:50,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:21:50,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:50" (1/1) ... [2021-08-27 05:21:50,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cef35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:50, skipping insertion in model container [2021-08-27 05:21:50,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:50" (1/1) ... [2021-08-27 05:21:50,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:21:50,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:21:51,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:21:51,175 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:21:51,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:21:51,251 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:21:51,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51 WrapperNode [2021-08-27 05:21:51,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:21:51,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:21:51,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:21:51,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:21:51,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:21:51,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:21:51,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:21:51,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:21:51,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (1/1) ... [2021-08-27 05:21:51,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:21:51,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:21:51,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:21:51,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:21:51,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:21:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:21:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:21:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:21:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:21:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:21:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:21:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:21:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-08-27 05:21:51,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-08-27 05:21:51,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:21:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:21:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:21:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:21:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:21:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:21:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:21:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:21:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:21:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:21:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:21:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:21:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:21:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:21:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:21:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:21:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:21:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:21:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:21:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:21:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:21:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:21:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:21:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:21:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:21:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:21:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:21:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:21:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:21:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:21:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:21:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:21:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:21:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:21:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:21:51,358 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:21:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:21:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:21:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:21:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:21:51,359 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:21:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:21:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:21:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:21:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:21:51,360 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:21:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:21:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:21:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:21:51,361 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:21:51,362 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-08-27 05:21:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:21:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:21:51,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:21:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-08-27 05:21:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:21:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:21:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:21:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:21:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:21:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:21:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:21:51,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:21:51,944 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 05:21:51,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:51 BoogieIcfgContainer [2021-08-27 05:21:51,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:21:51,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:21:51,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:21:51,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:21:51,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:21:50" (1/3) ... [2021-08-27 05:21:51,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a260c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:51, skipping insertion in model container [2021-08-27 05:21:51,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:51" (2/3) ... [2021-08-27 05:21:51,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a260c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:51, skipping insertion in model container [2021-08-27 05:21:51,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:51" (3/3) ... [2021-08-27 05:21:51,950 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-08-27 05:21:51,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:21:51,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-08-27 05:21:51,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:21:51,980 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:21:51,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-08-27 05:21:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 05:21:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 05:21:51,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:51,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:51,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-08-27 05:21:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010959135] [2021-08-27 05:21:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:52,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:52,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:52,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:52,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010959135] [2021-08-27 05:21:52,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010959135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:52,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:52,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:21:52,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93071388] [2021-08-27 05:21:52,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:21:52,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:21:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:21:52,273 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:52,489 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-08-27 05:21:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:21:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-08-27 05:21:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:52,498 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:21:52,498 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 05:21:52,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:21:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 05:21:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-08-27 05:21:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:21:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-08-27 05:21:52,530 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-08-27 05:21:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:52,530 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-08-27 05:21:52,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-08-27 05:21:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:21:52,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:52,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:52,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:21:52,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:52,532 INFO L82 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-08-27 05:21:52,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:52,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586806094] [2021-08-27 05:21:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:52,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:52,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:52,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586806094] [2021-08-27 05:21:52,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586806094] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:52,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:52,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:21:52,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800377771] [2021-08-27 05:21:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:21:52,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:21:52,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:52,710 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 05:21:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:52,923 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-08-27 05:21:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:21:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 05:21:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:52,925 INFO L225 Difference]: With dead ends: 91 [2021-08-27 05:21:52,925 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 05:21:52,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 05:21:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-08-27 05:21:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:21:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-08-27 05:21:52,931 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-08-27 05:21:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:52,931 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-08-27 05:21:52,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 05:21:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-08-27 05:21:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:21:52,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:52,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:52,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:21:52,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:52,932 INFO L82 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-08-27 05:21:52,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:52,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605501300] [2021-08-27 05:21:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:52,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:53,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:53,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605501300] [2021-08-27 05:21:53,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605501300] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:53,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:53,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:21:53,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946618261] [2021-08-27 05:21:53,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:21:53,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:21:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:53,030 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:53,240 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-08-27 05:21:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:21:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 10 [2021-08-27 05:21:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:53,245 INFO L225 Difference]: With dead ends: 135 [2021-08-27 05:21:53,245 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 05:21:53,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 05:21:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-08-27 05:21:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:21:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-08-27 05:21:53,251 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-08-27 05:21:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:53,251 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-08-27 05:21:53,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-08-27 05:21:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 05:21:53,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:53,252 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:53,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:21:53,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-08-27 05:21:53,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:53,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013983970] [2021-08-27 05:21:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:53,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:53,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:53,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013983970] [2021-08-27 05:21:53,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013983970] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:53,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:53,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:21:53,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910317192] [2021-08-27 05:21:53,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:21:53,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:21:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:53,351 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:53,510 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-08-27 05:21:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:21:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 05:21:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:53,512 INFO L225 Difference]: With dead ends: 149 [2021-08-27 05:21:53,512 INFO L226 Difference]: Without dead ends: 144 [2021-08-27 05:21:53,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-27 05:21:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-08-27 05:21:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 05:21:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-08-27 05:21:53,521 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-08-27 05:21:53,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:53,521 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-08-27 05:21:53,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-08-27 05:21:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 05:21:53,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:53,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:53,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:21:53,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-08-27 05:21:53,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:53,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327762886] [2021-08-27 05:21:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:53,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:53,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:53,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327762886] [2021-08-27 05:21:53,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327762886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:53,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:53,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:21:53,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552753786] [2021-08-27 05:21:53,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:21:53,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:21:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:53,616 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:53,891 INFO L93 Difference]: Finished difference Result 174 states and 254 transitions. [2021-08-27 05:21:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:21:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 05:21:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:53,893 INFO L225 Difference]: With dead ends: 174 [2021-08-27 05:21:53,893 INFO L226 Difference]: Without dead ends: 174 [2021-08-27 05:21:53,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:21:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-27 05:21:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2021-08-27 05:21:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.7767857142857142) internal successors, (199), 139 states have internal predecessors, (199), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2021-08-27 05:21:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-08-27 05:21:53,902 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 13 [2021-08-27 05:21:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:53,902 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-08-27 05:21:53,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-08-27 05:21:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 05:21:53,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:53,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:21:53,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-08-27 05:21:53,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:53,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846803176] [2021-08-27 05:21:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:53,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:53,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:53,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846803176] [2021-08-27 05:21:53,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846803176] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:53,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:53,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:21:53,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939919785] [2021-08-27 05:21:53,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:21:53,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:21:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:53,980 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:21:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:54,218 INFO L93 Difference]: Finished difference Result 265 states and 403 transitions. [2021-08-27 05:21:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:21:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-08-27 05:21:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:54,222 INFO L225 Difference]: With dead ends: 265 [2021-08-27 05:21:54,222 INFO L226 Difference]: Without dead ends: 265 [2021-08-27 05:21:54,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-27 05:21:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 238. [2021-08-27 05:21:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 189 states have (on average 1.7195767195767195) internal successors, (325), 216 states have internal predecessors, (325), 17 states have call successors, (17), 12 states have call predecessors, (17), 14 states have return successors, (34), 10 states have call predecessors, (34), 16 states have call successors, (34) [2021-08-27 05:21:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 376 transitions. [2021-08-27 05:21:54,235 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 376 transitions. Word has length 13 [2021-08-27 05:21:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:54,236 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 376 transitions. [2021-08-27 05:21:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:21:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 376 transitions. [2021-08-27 05:21:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 05:21:54,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:54,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:54,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:21:54,237 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-08-27 05:21:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:54,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169133276] [2021-08-27 05:21:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:54,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:54,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:54,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169133276] [2021-08-27 05:21:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169133276] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:54,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:54,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:21:54,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428463629] [2021-08-27 05:21:54,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:21:54,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:21:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:21:54,322 INFO L87 Difference]: Start difference. First operand 238 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:21:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:54,582 INFO L93 Difference]: Finished difference Result 329 states and 503 transitions. [2021-08-27 05:21:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:21:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-08-27 05:21:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:54,584 INFO L225 Difference]: With dead ends: 329 [2021-08-27 05:21:54,584 INFO L226 Difference]: Without dead ends: 329 [2021-08-27 05:21:54,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-27 05:21:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 305. [2021-08-27 05:21:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 253 states have (on average 1.683794466403162) internal successors, (426), 278 states have internal predecessors, (426), 17 states have call successors, (17), 17 states have call predecessors, (17), 19 states have return successors, (34), 10 states have call predecessors, (34), 16 states have call successors, (34) [2021-08-27 05:21:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 477 transitions. [2021-08-27 05:21:54,594 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 477 transitions. Word has length 13 [2021-08-27 05:21:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:54,595 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 477 transitions. [2021-08-27 05:21:54,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 05:21:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 477 transitions. [2021-08-27 05:21:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:21:54,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:54,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:54,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:21:54,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-08-27 05:21:54,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:54,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794985925] [2021-08-27 05:21:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:54,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:54,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:54,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794985925] [2021-08-27 05:21:54,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794985925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:54,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:54,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:21:54,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445688024] [2021-08-27 05:21:54,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:21:54,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:21:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:21:54,697 INFO L87 Difference]: Start difference. First operand 305 states and 477 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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 05:21:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:54,869 INFO L93 Difference]: Finished difference Result 270 states and 379 transitions. [2021-08-27 05:21:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:21:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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 14 [2021-08-27 05:21:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:54,871 INFO L225 Difference]: With dead ends: 270 [2021-08-27 05:21:54,871 INFO L226 Difference]: Without dead ends: 270 [2021-08-27 05:21:54,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:21:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-27 05:21:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2021-08-27 05:21:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 192 states have (on average 1.5989583333333333) internal successors, (307), 211 states have internal predecessors, (307), 14 states have call successors, (14), 14 states have call predecessors, (14), 17 states have return successors, (24), 9 states have call predecessors, (24), 13 states have call successors, (24) [2021-08-27 05:21:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 345 transitions. [2021-08-27 05:21:54,883 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 345 transitions. Word has length 14 [2021-08-27 05:21:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:54,883 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 345 transitions. [2021-08-27 05:21:54,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 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 05:21:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 345 transitions. [2021-08-27 05:21:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 05:21:54,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:54,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:54,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:21:54,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-08-27 05:21:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:54,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233580378] [2021-08-27 05:21:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:54,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:21:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:54,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:21:54,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233580378] [2021-08-27 05:21:54,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233580378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:54,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:54,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:21:54,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80354956] [2021-08-27 05:21:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:21:54,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:21:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:21:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:21:54,993 INFO L87 Difference]: Start difference. First operand 235 states and 345 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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 05:21:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:55,200 INFO L93 Difference]: Finished difference Result 402 states and 560 transitions. [2021-08-27 05:21:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:21:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 05:21:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:55,202 INFO L225 Difference]: With dead ends: 402 [2021-08-27 05:21:55,202 INFO L226 Difference]: Without dead ends: 402 [2021-08-27 05:21:55,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:21:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-27 05:21:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2021-08-27 05:21:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 305 states have (on average 1.498360655737705) internal successors, (457), 336 states have internal predecessors, (457), 24 states have call successors, (24), 24 states have call predecessors, (24), 35 states have return successors, (50), 15 states have call predecessors, (50), 23 states have call successors, (50) [2021-08-27 05:21:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 531 transitions. [2021-08-27 05:21:55,212 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 531 transitions. Word has length 15 [2021-08-27 05:21:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:55,213 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 531 transitions. [2021-08-27 05:21:55,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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 05:21:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 531 transitions. [2021-08-27 05:21:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:21:55,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:55,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:55,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:21:55,214 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-08-27 05:21:55,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:21:55,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131861240] [2021-08-27 05:21:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:55,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:21:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:21:55,233 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:21:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:21:55,270 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 05:21:55,270 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:21:55,271 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-08-27 05:21:55,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:21:55,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:21:55,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:21:55,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:21:55,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:21:55,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 05:21:55,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:21:55,292 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 05:21:55,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:21:55 BoogieIcfgContainer [2021-08-27 05:21:55,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:21:55,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:21:55,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:21:55,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:21:55,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:51" (3/4) ... [2021-08-27 05:21:55,317 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 05:21:55,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:21:55,318 INFO L168 Benchmark]: Toolchain (without parser) took 4427.25 ms. Allocated memory was 58.7 MB in the beginning and 146.8 MB in the end (delta: 88.1 MB). Free memory was 36.2 MB in the beginning and 57.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:21:55,318 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:21:55,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.06 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.9 MB in the beginning and 53.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:21:55,319 INFO L168 Benchmark]: Boogie Preprocessor took 34.58 ms. Allocated memory is still 77.6 MB. Free memory was 53.9 MB in the beginning and 51.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:21:55,319 INFO L168 Benchmark]: RCFGBuilder took 657.29 ms. Allocated memory is still 77.6 MB. Free memory was 50.8 MB in the beginning and 46.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2021-08-27 05:21:55,319 INFO L168 Benchmark]: TraceAbstraction took 3368.28 ms. Allocated memory was 77.6 MB in the beginning and 146.8 MB in the end (delta: 69.2 MB). Free memory was 45.7 MB in the beginning and 57.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:21:55,319 INFO L168 Benchmark]: Witness Printer took 2.25 ms. Allocated memory is still 146.8 MB. Free memory is still 57.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:21:55,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.06 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.9 MB in the beginning and 53.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.58 ms. Allocated memory is still 77.6 MB. Free memory was 53.9 MB in the beginning and 51.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 657.29 ms. Allocated memory is still 77.6 MB. Free memory was 50.8 MB in the beginning and 46.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3368.28 ms. Allocated memory was 77.6 MB in the beginning and 146.8 MB in the end (delta: 69.2 MB). Free memory was 45.7 MB in the beginning and 57.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.25 ms. Allocated memory is still 146.8 MB. Free memory is still 57.6 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=49, \old(garbage)=60, \old(pc1)=55, \old(pc4)=52, \old(res4)=68, \old(S)=61, \old(S)=64, \old(t1)=58, \old(t1)=71, \old(t4)=65, \old(t4)=59, \old(x1)=67, \old(x1)=69, \old(x4)=54, \old(x4)=57, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc4 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 3303.0ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 11.2ms, AutomataDifference: 2000.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 813 SDtfs, 508 SDslu, 788 SDs, 0 SdLazy, 1208 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1153.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 859.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=9, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 92.3ms AutomataMinimizationTime, 9 MinimizatonAttempts, 215 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.4ms SsaConstructionTime, 115.2ms SatisfiabilityAnalysisTime, 862.0ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 863 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 05:21:55,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:21:56,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:21:56,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:21:56,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:21:56,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:21:56,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:21:56,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:21:56,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:21:56,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:21:56,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:21:56,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:21:56,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:21:56,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:21:56,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:21:56,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:21:56,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:21:56,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:21:56,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:21:56,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:21:56,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:21:56,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:21:56,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:21:56,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:21:56,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:21:56,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:21:56,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:21:56,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:21:56,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:21:56,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:21:56,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:21:56,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:21:56,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:21:56,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:21:56,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:21:56,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:21:56,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:21:56,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:21:56,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:21:56,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:21:56,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:21:56,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:21:56,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 05:21:56,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:21:56,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:21:56,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:21:56,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:21:56,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:21:56,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:21:56,943 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:21:56,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:21:56,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:21:56,943 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:21:56,944 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:21:56,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:21:56,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:21:56,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 05:21:56,946 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 05:21:56,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:21:56,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 05:21:56,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2021-08-27 05:21:57,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:21:57,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:21:57,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:21:57,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:21:57,186 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:21:57,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-08-27 05:21:57,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9408a091c/ad87871e31704cd0bc8421e235656474/FLAG4d05bb11a [2021-08-27 05:21:57,597 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:21:57,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/lockfree-3.2.i [2021-08-27 05:21:57,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9408a091c/ad87871e31704cd0bc8421e235656474/FLAG4d05bb11a [2021-08-27 05:21:57,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9408a091c/ad87871e31704cd0bc8421e235656474 [2021-08-27 05:21:57,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:21:57,981 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:21:57,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:21:57,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:21:57,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:21:57,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:57" (1/1) ... [2021-08-27 05:21:57,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515f875f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:57, skipping insertion in model container [2021-08-27 05:21:57,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:57" (1/1) ... [2021-08-27 05:21:57,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:21:58,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:21:58,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:21:58,231 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:21:58,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:21:58,292 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:21:58,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58 WrapperNode [2021-08-27 05:21:58,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:21:58,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:21:58,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:21:58,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:21:58,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:21:58,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:21:58,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:21:58,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:21:58,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (1/1) ... [2021-08-27 05:21:58,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:21:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:21:58,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:21:58,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:21:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:21:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:21:58,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:21:58,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:21:58,399 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-08-27 05:21:58,399 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-08-27 05:21:58,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:21:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:21:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:21:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:21:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:21:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:21:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:21:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:21:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:21:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:21:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:21:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:21:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:21:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:21:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:21:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:21:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:21:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 05:21:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:21:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:21:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 05:21:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 05:21:58,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:21:58,872 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 05:21:58,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:58 BoogieIcfgContainer [2021-08-27 05:21:58,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:21:58,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:21:58,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:21:58,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:21:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:21:57" (1/3) ... [2021-08-27 05:21:58,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185737be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:58, skipping insertion in model container [2021-08-27 05:21:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:58" (2/3) ... [2021-08-27 05:21:58,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185737be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:58, skipping insertion in model container [2021-08-27 05:21:58,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:58" (3/3) ... [2021-08-27 05:21:58,880 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2021-08-27 05:21:58,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:21:58,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-08-27 05:21:58,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:21:58,918 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:21:58,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-08-27 05:21:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 05:21:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 05:21:58,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:58,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:58,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-08-27 05:21:58,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:21:58,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758503948] [2021-08-27 05:21:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:58,954 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:21:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:21:58,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:21:58,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 05:21:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-27 05:21:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:21:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:59,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:21:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:59,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:21:59,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758503948] [2021-08-27 05:21:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758503948] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:59,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:59,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 05:21:59,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693258970] [2021-08-27 05:21:59,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-27 05:21:59,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:21:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-27 05:21:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-27 05:21:59,227 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:59,242 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-08-27 05:21:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 05:21:59,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-08-27 05:21:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:59,249 INFO L225 Difference]: With dead ends: 72 [2021-08-27 05:21:59,249 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 05:21:59,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-27 05:21:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 05:21:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-27 05:21:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:21:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-08-27 05:21:59,279 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-08-27 05:21:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:59,279 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-08-27 05:21:59,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-08-27 05:21:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 05:21:59,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:59,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:59,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:21:59,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:21:59,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:21:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:21:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-08-27 05:21:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:21:59,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690371388] [2021-08-27 05:21:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:21:59,486 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:21:59,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:21:59,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:21:59,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 05:21:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:21:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 05:21:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:21:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:59,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:21:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:21:59,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:21:59,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690371388] [2021-08-27 05:21:59,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690371388] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:21:59,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:21:59,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 05:21:59,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702359262] [2021-08-27 05:21:59,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:21:59,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:21:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:21:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:21:59,907 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:21:59,939 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-08-27 05:21:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:21:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 8 [2021-08-27 05:21:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:21:59,940 INFO L225 Difference]: With dead ends: 120 [2021-08-27 05:21:59,940 INFO L226 Difference]: Without dead ends: 120 [2021-08-27 05:21:59,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:21:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-27 05:21:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-08-27 05:21:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:21:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-08-27 05:21:59,950 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-08-27 05:21:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:21:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-08-27 05:21:59,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:21:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-08-27 05:21:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 05:21:59,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:21:59,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:21:59,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:00,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:00,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-08-27 05:22:00,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:00,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038145061] [2021-08-27 05:22:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:00,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:00,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:00,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 05:22:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:22:00,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 05:22:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:22:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:00,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:22:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:00,366 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:22:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038145061] [2021-08-27 05:22:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038145061] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:22:00,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:22:00,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 05:22:00,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638042880] [2021-08-27 05:22:00,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:22:00,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:22:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:22:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:22:00,368 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:22:00,458 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-08-27 05:22:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:22:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-08-27 05:22:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:22:00,460 INFO L225 Difference]: With dead ends: 128 [2021-08-27 05:22:00,460 INFO L226 Difference]: Without dead ends: 125 [2021-08-27 05:22:00,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:22:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-27 05:22:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-08-27 05:22:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 05:22:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-08-27 05:22:00,473 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-08-27 05:22:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:22:00,473 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-08-27 05:22:00,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-08-27 05:22:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 05:22:00,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:22:00,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:22:00,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:00,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:00,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-08-27 05:22:00,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:00,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473659192] [2021-08-27 05:22:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:00,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:00,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:00,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 05:22:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:22:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 05:22:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:22:00,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:22:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:00,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:22:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:00,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:22:00,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473659192] [2021-08-27 05:22:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473659192] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:22:00,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:22:00,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 05:22:00,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522296245] [2021-08-27 05:22:00,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:22:00,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:22:00,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:22:00,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:22:00,901 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:22:00,989 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-08-27 05:22:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:22:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 05:22:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:22:00,991 INFO L225 Difference]: With dead ends: 198 [2021-08-27 05:22:00,991 INFO L226 Difference]: Without dead ends: 198 [2021-08-27 05:22:00,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:22:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-27 05:22:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-08-27 05:22:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-08-27 05:22:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-08-27 05:22:01,001 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-08-27 05:22:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:22:01,002 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-08-27 05:22:01,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-08-27 05:22:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 05:22:01,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:22:01,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:22:01,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:01,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:01,203 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-08-27 05:22:01,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:01,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271610485] [2021-08-27 05:22:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:01,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:01,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 05:22:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:22:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 05:22:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:22:01,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:22:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:01,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:22:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:01,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:22:01,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271610485] [2021-08-27 05:22:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271610485] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:22:01,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:22:01,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 05:22:01,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730675550] [2021-08-27 05:22:01,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:22:01,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:22:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:22:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:22:01,450 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:22:01,633 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-08-27 05:22:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:22:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 05:22:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:22:01,635 INFO L225 Difference]: With dead ends: 333 [2021-08-27 05:22:01,636 INFO L226 Difference]: Without dead ends: 333 [2021-08-27 05:22:01,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:22:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-27 05:22:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-08-27 05:22:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-08-27 05:22:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-08-27 05:22:01,663 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-08-27 05:22:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:22:01,663 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-08-27 05:22:01,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:22:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-08-27 05:22:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:22:01,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:22:01,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:22:01,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:01,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:01,874 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-08-27 05:22:01,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:01,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586069432] [2021-08-27 05:22:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:01,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:01,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:01,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 05:22:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:22:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:22:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:22:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:22:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:02,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:22:02,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586069432] [2021-08-27 05:22:02,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586069432] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:22:02,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:22:02,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 05:22:02,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781086850] [2021-08-27 05:22:02,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:22:02,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:22:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:22:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:22:02,128 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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 05:22:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:22:02,157 INFO L93 Difference]: Finished difference Result 212 states and 298 transitions. [2021-08-27 05:22:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:22:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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 12 [2021-08-27 05:22:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:22:02,159 INFO L225 Difference]: With dead ends: 212 [2021-08-27 05:22:02,160 INFO L226 Difference]: Without dead ends: 212 [2021-08-27 05:22:02,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:22:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-27 05:22:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2021-08-27 05:22:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-08-27 05:22:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-08-27 05:22:02,177 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-08-27 05:22:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:22:02,178 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-08-27 05:22:02,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 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 05:22:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-08-27 05:22:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 05:22:02,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:22:02,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:22:02,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:02,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:02,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-08-27 05:22:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:02,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914849675] [2021-08-27 05:22:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:02,392 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:02,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:02,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 05:22:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:22:02,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:22:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:22:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:22:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:22:02,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:22:02,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914849675] [2021-08-27 05:22:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914849675] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:22:02,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:22:02,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 05:22:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436801164] [2021-08-27 05:22:02,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:22:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:22:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:22:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:22:02,636 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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 05:22:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:22:02,662 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-08-27 05:22:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:22:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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 13 [2021-08-27 05:22:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:22:02,666 INFO L225 Difference]: With dead ends: 281 [2021-08-27 05:22:02,666 INFO L226 Difference]: Without dead ends: 281 [2021-08-27 05:22:02,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:22:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-27 05:22:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-08-27 05:22:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-08-27 05:22:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-08-27 05:22:02,679 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-08-27 05:22:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:22:02,680 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-08-27 05:22:02,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 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 05:22:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-08-27 05:22:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:22:02,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:22:02,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:22:02,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:02,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:02,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 05:22:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:22:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-08-27 05:22:02,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:22:02,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110928419] [2021-08-27 05:22:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:22:02,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:22:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:22:02,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:22:02,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-27 05:22:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:22:03,060 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:22:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:22:03,139 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-27 05:22:03,139 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:22:03,140 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-08-27 05:22:03,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:22:03,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:22:03,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-27 05:22:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:22:03,346 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:22:03,356 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 05:22:03,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:22:03 BoogieIcfgContainer [2021-08-27 05:22:03,369 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:22:03,369 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:22:03,369 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:22:03,370 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:22:03,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:58" (3/4) ... [2021-08-27 05:22:03,372 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 05:22:03,372 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:22:03,373 INFO L168 Benchmark]: Toolchain (without parser) took 5391.17 ms. Allocated memory was 69.2 MB in the beginning and 134.2 MB in the end (delta: 65.0 MB). Free memory was 47.6 MB in the beginning and 71.0 MB in the end (delta: -23.3 MB). Peak memory consumption was 41.0 MB. Max. memory is 16.1 GB. [2021-08-27 05:22:03,373 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 69.2 MB. Free memory was 49.7 MB in the beginning and 49.6 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:22:03,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.93 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 44.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:22:03,374 INFO L168 Benchmark]: Boogie Preprocessor took 48.32 ms. Allocated memory is still 69.2 MB. Free memory was 44.6 MB in the beginning and 41.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:22:03,374 INFO L168 Benchmark]: RCFGBuilder took 531.65 ms. Allocated memory was 69.2 MB in the beginning and 92.3 MB in the end (delta: 23.1 MB). Free memory was 41.6 MB in the beginning and 51.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2021-08-27 05:22:03,374 INFO L168 Benchmark]: TraceAbstraction took 4493.45 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 50.5 MB in the beginning and 71.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:22:03,374 INFO L168 Benchmark]: Witness Printer took 2.42 ms. Allocated memory is still 134.2 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:22:03,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 69.2 MB. Free memory was 49.7 MB in the beginning and 49.6 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.93 ms. Allocated memory is still 69.2 MB. Free memory was 47.4 MB in the beginning and 44.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.32 ms. Allocated memory is still 69.2 MB. Free memory was 44.6 MB in the beginning and 41.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 531.65 ms. Allocated memory was 69.2 MB in the beginning and 92.3 MB in the end (delta: 23.1 MB). Free memory was 41.6 MB in the beginning and 51.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4493.45 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 50.5 MB in the beginning and 71.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.42 ms. Allocated memory is still 134.2 MB. Free memory is still 71.0 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=16, \old(pc4)=26, \old(res4)=20, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 4435.3ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 19.9ms, AutomataDifference: 504.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 668 SDtfs, 519 SDslu, 494 SDs, 0 SdLazy, 164 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 321.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=295occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 118 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 123.1ms SsaConstructionTime, 269.4ms SatisfiabilityAnalysisTime, 788.0ms InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 296 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1050 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 05:22:03,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...