./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/ntdrivers/floppy.i.cil-3.c -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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:04:25,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:04:25,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:04:25,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:04:25,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:04:25,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:04:25,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:04:25,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:04:25,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:04:25,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:04:25,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:04:25,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:04:25,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:04:25,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:04:25,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:04:25,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:04:25,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:04:25,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:04:25,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:04:25,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:04:25,218 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:04:25,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:04:25,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:04:25,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:04:25,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:04:25,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:04:25,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:04:25,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:04:25,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:04:25,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:04:25,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:04:25,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:04:25,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:04:25,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:04:25,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:04:25,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:04:25,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:04:25,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:04:25,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:04:25,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:04:25,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:04:25,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:04:25,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 07:04:25,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:04:25,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:04:25,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:04:25,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:04:25,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:04:25,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:04:25,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:04:25,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:04:25,268 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:04:25,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:04:25,269 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:04:25,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:04:25,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:04:25,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:04:25,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:04:25,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:04:25,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:04:25,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:04:25,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 07:04:25,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 07:04:25,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-14 07:04:25,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:04:25,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:04:25,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:04:25,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:04:25,498 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:04:25,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-14 07:04:25,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e58e4a2/77b5458aeadb4cf28c1c2dd5b37d3ed9/FLAGea717037a [2022-07-14 07:04:26,177 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:04:26,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-14 07:04:26,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e58e4a2/77b5458aeadb4cf28c1c2dd5b37d3ed9/FLAGea717037a [2022-07-14 07:04:26,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e58e4a2/77b5458aeadb4cf28c1c2dd5b37d3ed9 [2022-07-14 07:04:26,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:04:26,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:04:26,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:04:26,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:04:26,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:04:26,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:04:26" (1/1) ... [2022-07-14 07:04:26,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b25cf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:26, skipping insertion in model container [2022-07-14 07:04:26,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:04:26" (1/1) ... [2022-07-14 07:04:26,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:04:26,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:04:26,995 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-14 07:04:27,037 WARN L570 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2022-07-14 07:04:27,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:04:27,323 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 07:04:27,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@371704f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:27, skipping insertion in model container [2022-07-14 07:04:27,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:04:27,325 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 07:04:27,326 INFO L158 Benchmark]: Toolchain (without parser) took 925.22ms. Allocated memory is still 163.6MB. Free memory was 125.2MB in the beginning and 75.0MB in the end (delta: 50.2MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-07-14 07:04:27,327 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 07:04:27,329 INFO L158 Benchmark]: CACSL2BoogieTranslator took 923.27ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 75.0MB in the end (delta: 49.7MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-07-14 07:04:27,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 923.27ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 75.0MB in the end (delta: 49.7MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2246]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/ntdrivers/floppy.i.cil-3.c -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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:04:28,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:04:28,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:04:29,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:04:29,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:04:29,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:04:29,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:04:29,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:04:29,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:04:29,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:04:29,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:04:29,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:04:29,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:04:29,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:04:29,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:04:29,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:04:29,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:04:29,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:04:29,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:04:29,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:04:29,037 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:04:29,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:04:29,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:04:29,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:04:29,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:04:29,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:04:29,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:04:29,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:04:29,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:04:29,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:04:29,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:04:29,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:04:29,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:04:29,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:04:29,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:04:29,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:04:29,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:04:29,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:04:29,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:04:29,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:04:29,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:04:29,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:04:29,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 07:04:29,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:04:29,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:04:29,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:04:29,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:04:29,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:04:29,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:04:29,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:04:29,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:04:29,088 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:04:29,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:04:29,089 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 07:04:29,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:04:29,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:04:29,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:04:29,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:04:29,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:04:29,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:04:29,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:04:29,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:04:29,092 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 07:04:29,092 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 07:04:29,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 07:04:29,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-14 07:04:29,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:04:29,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:04:29,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:04:29,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:04:29,362 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:04:29,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-14 07:04:29,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2928d4ae/d2dce7d927634de8be4ed11d4a167bcb/FLAG1e2416204 [2022-07-14 07:04:29,876 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:04:29,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-14 07:04:29,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2928d4ae/d2dce7d927634de8be4ed11d4a167bcb/FLAG1e2416204 [2022-07-14 07:04:30,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2928d4ae/d2dce7d927634de8be4ed11d4a167bcb [2022-07-14 07:04:30,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:04:30,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:04:30,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:04:30,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:04:30,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:04:30,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:04:30" (1/1) ... [2022-07-14 07:04:30,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e4ab68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:30, skipping insertion in model container [2022-07-14 07:04:30,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:04:30" (1/1) ... [2022-07-14 07:04:30,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:04:30,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:04:30,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-14 07:04:31,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:04:31,151 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 07:04:31,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:04:31,237 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-14 07:04:31,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:04:31,423 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 07:04:31,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-14 07:04:31,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:04:31,718 INFO L208 MainTranslator]: Completed translation [2022-07-14 07:04:31,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31 WrapperNode [2022-07-14 07:04:31,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:04:31,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 07:04:31,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 07:04:31,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 07:04:31,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:31,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:31,912 INFO L137 Inliner]: procedures = 142, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3022 [2022-07-14 07:04:31,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 07:04:31,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 07:04:31,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 07:04:31,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 07:04:31,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:31,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:31,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:31,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:32,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:32,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:32,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:32,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 07:04:32,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 07:04:32,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 07:04:32,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 07:04:32,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (1/1) ... [2022-07-14 07:04:32,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:04:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:04:32,144 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) [2022-07-14 07:04:32,146 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 [2022-07-14 07:04:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-14 07:04:32,178 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-14 07:04:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 07:04:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-14 07:04:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-14 07:04:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-14 07:04:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-14 07:04:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-14 07:04:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-14 07:04:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-07-14 07:04:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-14 07:04:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-14 07:04:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-07-14 07:04:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-14 07:04:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-14 07:04:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-14 07:04:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-14 07:04:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-14 07:04:32,181 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-14 07:04:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-14 07:04:32,182 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-14 07:04:32,182 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-14 07:04:32,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 07:04:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-14 07:04:32,183 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 07:04:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-14 07:04:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-14 07:04:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-14 07:04:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-14 07:04:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-14 07:04:32,186 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-14 07:04:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-14 07:04:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-14 07:04:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-07-14 07:04:32,187 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-07-14 07:04:32,187 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-07-14 07:04:32,188 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-14 07:04:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-14 07:04:32,188 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-14 07:04:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-14 07:04:32,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 07:04:32,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 07:04:32,647 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 07:04:32,649 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 07:04:32,707 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:32,716 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-14 07:04:32,716 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-14 07:04:32,722 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:33,082 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-14 07:04:33,083 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-14 07:04:33,118 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:33,129 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-14 07:04:33,129 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-14 07:04:33,134 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,261 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,271 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,292 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-14 07:04:35,293 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-14 07:04:35,294 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,296 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,296 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-14 07:04:35,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-14 07:04:35,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-14 07:04:35,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-14 07:04:35,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-14 07:04:35,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-14 07:04:35,536 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,553 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:35,555 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,106 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-14 07:04:39,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-14 07:04:39,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-14 07:04:39,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-14 07:04:39,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-14 07:04:39,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-14 07:04:39,207 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,313 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-14 07:04:39,313 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-14 07:04:39,320 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,320 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,322 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,332 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,333 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,336 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,338 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:39,339 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 07:04:42,024 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-14 07:04:42,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-14 07:04:42,026 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-14 07:04:42,026 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-14 07:04:42,036 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 07:04:42,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 07:04:42,058 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 07:04:42,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:04:42 BoogieIcfgContainer [2022-07-14 07:04:42,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 07:04:42,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 07:04:42,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 07:04:42,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 07:04:42,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 07:04:30" (1/3) ... [2022-07-14 07:04:42,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712591b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:04:42, skipping insertion in model container [2022-07-14 07:04:42,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:04:31" (2/3) ... [2022-07-14 07:04:42,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712591b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:04:42, skipping insertion in model container [2022-07-14 07:04:42,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:04:42" (3/3) ... [2022-07-14 07:04:42,080 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-07-14 07:04:42,090 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 07:04:42,091 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2022-07-14 07:04:42,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 07:04:42,154 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f1a4c38, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3456ffc2 [2022-07-14 07:04:42,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2022-07-14 07:04:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-14 07:04:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 07:04:42,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:04:42,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 07:04:42,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:04:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:04:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2022-07-14 07:04:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:04:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918887462] [2022-07-14 07:04:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:04:42,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:04:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:04:42,186 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) [2022-07-14 07:04:42,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 07:04:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:04:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 07:04:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:04:43,760 INFO L356 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2022-07-14 07:04:43,761 INFO L390 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 4 case distinctions, treesize of input 18 treesize of output 38 [2022-07-14 07:04:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:04:43,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:04:43,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:04:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918887462] [2022-07-14 07:04:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918887462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:04:43,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:04:43,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:04:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778814821] [2022-07-14 07:04:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:04:43,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:04:43,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:04:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:04:43,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:04:43,850 INFO L87 Difference]: Start difference. First operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:04:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:04:46,642 INFO L93 Difference]: Finished difference Result 2077 states and 2349 transitions. [2022-07-14 07:04:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:04:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 07:04:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:04:46,657 INFO L225 Difference]: With dead ends: 2077 [2022-07-14 07:04:46,657 INFO L226 Difference]: Without dead ends: 2075 [2022-07-14 07:04:46,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:04:46,660 INFO L413 NwaCegarLoop]: 2312 mSDtfsCounter, 57 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-14 07:04:46,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3654 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-14 07:04:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-07-14 07:04:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2022-07-14 07:04:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 1017 states have (on average 2.1435594886922322) internal successors, (2180), 1991 states have internal predecessors, (2180), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:04:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2347 transitions. [2022-07-14 07:04:46,744 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2347 transitions. Word has length 3 [2022-07-14 07:04:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:04:46,745 INFO L495 AbstractCegarLoop]: Abstraction has 2075 states and 2347 transitions. [2022-07-14 07:04:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:04:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2347 transitions. [2022-07-14 07:04:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 07:04:46,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:04:46,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 07:04:46,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 07:04:46,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:04:46,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:04:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:04:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2022-07-14 07:04:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:04:46,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349540604] [2022-07-14 07:04:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:04:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:04:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:04:46,970 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) [2022-07-14 07:04:46,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 07:04:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:04:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 07:04:48,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:04:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:04:48,584 INFO L356 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-07-14 07:04:48,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-07-14 07:04:48,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1122 treesize of output 1106 [2022-07-14 07:04:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:04:48,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:04:48,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:04:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349540604] [2022-07-14 07:04:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349540604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:04:48,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:04:48,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:04:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811426256] [2022-07-14 07:04:48,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:04:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:04:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:04:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:04:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:04:48,767 INFO L87 Difference]: Start difference. First operand 2075 states and 2347 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:04:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:04:52,170 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2022-07-14 07:04:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:04:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 07:04:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:04:52,176 INFO L225 Difference]: With dead ends: 2073 [2022-07-14 07:04:52,176 INFO L226 Difference]: Without dead ends: 2073 [2022-07-14 07:04:52,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:04:52,177 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 5 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:04:52,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3723 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-14 07:04:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-07-14 07:04:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2022-07-14 07:04:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1017 states have (on average 2.1415929203539825) internal successors, (2178), 1989 states have internal predecessors, (2178), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:04:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2022-07-14 07:04:52,220 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 3 [2022-07-14 07:04:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:04:52,220 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2022-07-14 07:04:52,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:04:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2022-07-14 07:04:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:04:52,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:04:52,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:04:52,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-14 07:04:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:04:52,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:04:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:04:52,459 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2022-07-14 07:04:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:04:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007310020] [2022-07-14 07:04:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:04:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:04:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:04:52,462 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) [2022-07-14 07:04:52,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 07:04:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:04:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 07:04:53,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:04:53,351 INFO L356 Elim1Store]: treesize reduction 118, result has 36.2 percent of original size [2022-07-14 07:04:53,351 INFO L390 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 4 case distinctions, treesize of input 18 treesize of output 72 [2022-07-14 07:04:53,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 07:04:53,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-14 07:04:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:04:53,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:04:53,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:04:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007310020] [2022-07-14 07:04:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007310020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:04:53,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:04:53,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:04:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691815137] [2022-07-14 07:04:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:04:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:04:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:04:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:04:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:04:53,465 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:04:57,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 07:05:02,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 07:05:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:05:02,291 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2022-07-14 07:05:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:05:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 07:05:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:05:02,297 INFO L225 Difference]: With dead ends: 2072 [2022-07-14 07:05:02,297 INFO L226 Difference]: Without dead ends: 2072 [2022-07-14 07:05:02,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:05:02,298 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 4091 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-07-14 07:05:02,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6431 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2934 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-07-14 07:05:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-07-14 07:05:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-07-14 07:05:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:05:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-07-14 07:05:02,371 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2022-07-14 07:05:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:05:02,371 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-07-14 07:05:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:05:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-07-14 07:05:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:05:02,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:05:02,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:05:02,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 07:05:02,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:05:02,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:05:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:05:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2022-07-14 07:05:02,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:05:02,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738234975] [2022-07-14 07:05:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:05:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:05:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:05:02,595 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) [2022-07-14 07:05:02,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 07:05:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:05:03,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:05:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:05:03,534 INFO L356 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2022-07-14 07:05:03,535 INFO L390 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 4 case distinctions, treesize of input 18 treesize of output 60 [2022-07-14 07:05:03,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 07:05:03,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 07:05:03,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 07:05:03,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 07:05:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:05:03,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:05:03,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:05:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738234975] [2022-07-14 07:05:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738234975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:05:03,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:05:03,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:05:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928948218] [2022-07-14 07:05:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:05:03,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:05:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:05:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:05:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:05:03,644 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:05:08,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 07:05:14,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 07:05:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:05:14,477 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2022-07-14 07:05:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:05:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 07:05:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:05:14,485 INFO L225 Difference]: With dead ends: 2071 [2022-07-14 07:05:14,485 INFO L226 Difference]: Without dead ends: 2071 [2022-07-14 07:05:14,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:05:14,487 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 4154 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-07-14 07:05:14,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6494 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2869 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2022-07-14 07:05:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-07-14 07:05:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2022-07-14 07:05:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1016 states have (on average 2.141732283464567) internal successors, (2176), 1987 states have internal predecessors, (2176), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:05:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2022-07-14 07:05:14,515 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2022-07-14 07:05:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:05:14,515 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2022-07-14 07:05:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:05:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2022-07-14 07:05:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 07:05:14,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:05:14,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:05:14,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-14 07:05:14,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:05:14,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:05:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:05:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2022-07-14 07:05:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:05:14,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853378173] [2022-07-14 07:05:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:05:14,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:05:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:05:14,736 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) [2022-07-14 07:05:14,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 07:05:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:05:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 07:05:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:05:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:05:15,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:05:15,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:05:15,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853378173] [2022-07-14 07:05:15,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853378173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:05:15,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:05:15,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:05:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719815181] [2022-07-14 07:05:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:05:15,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:05:15,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:05:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:05:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:05:15,650 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:05:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:05:15,730 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2022-07-14 07:05:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:05:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-14 07:05:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:05:15,736 INFO L225 Difference]: With dead ends: 2074 [2022-07-14 07:05:15,736 INFO L226 Difference]: Without dead ends: 2072 [2022-07-14 07:05:15,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:05:15,737 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 2 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:05:15,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7018 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:05:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-07-14 07:05:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-07-14 07:05:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:05:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-07-14 07:05:15,769 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 13 [2022-07-14 07:05:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:05:15,769 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-07-14 07:05:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:05:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-07-14 07:05:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 07:05:15,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:05:15,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:05:15,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 07:05:15,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:05:15,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:05:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:05:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1906515750, now seen corresponding path program 1 times [2022-07-14 07:05:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:05:15,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557827449] [2022-07-14 07:05:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:05:15,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:05:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:05:15,995 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) [2022-07-14 07:05:15,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 07:05:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:05:16,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 07:05:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:05:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:05:16,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:05:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:05:16,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:05:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557827449] [2022-07-14 07:05:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557827449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:05:16,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:05:16,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 07:05:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235398074] [2022-07-14 07:05:16,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:05:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:05:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:05:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:05:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:05:16,986 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:05:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:05:17,149 INFO L93 Difference]: Finished difference Result 2084 states and 2359 transitions. [2022-07-14 07:05:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 07:05:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-07-14 07:05:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:05:17,154 INFO L225 Difference]: With dead ends: 2084 [2022-07-14 07:05:17,154 INFO L226 Difference]: Without dead ends: 2082 [2022-07-14 07:05:17,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-07-14 07:05:17,155 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 11 mSDsluCounter, 7012 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9352 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:05:17,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9352 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:05:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-07-14 07:05:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2022-07-14 07:05:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1026 states have (on average 2.1335282651072123) internal successors, (2189), 1997 states have internal predecessors, (2189), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:05:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2356 transitions. [2022-07-14 07:05:17,179 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2356 transitions. Word has length 14 [2022-07-14 07:05:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:05:17,179 INFO L495 AbstractCegarLoop]: Abstraction has 2082 states and 2356 transitions. [2022-07-14 07:05:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:05:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2356 transitions. [2022-07-14 07:05:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 07:05:17,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:05:17,180 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:05:17,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 07:05:17,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:05:17,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:05:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:05:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494956, now seen corresponding path program 2 times [2022-07-14 07:05:17,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:05:17,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125182378] [2022-07-14 07:05:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:05:17,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:05:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:05:17,397 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) [2022-07-14 07:05:17,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 07:05:19,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 07:05:19,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:05:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 07:05:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:05:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:05:19,421 INFO L356 Elim1Store]: treesize reduction 142, result has 24.1 percent of original size [2022-07-14 07:05:19,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 85 [2022-07-14 07:06:16,414 INFO L356 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2022-07-14 07:06:16,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 116 [2022-07-14 07:07:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:08,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:08,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:08,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125182378] [2022-07-14 07:07:08,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125182378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:08,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:08,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:08,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068538021] [2022-07-14 07:07:08,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:08,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:08,500 INFO L87 Difference]: Start difference. First operand 2082 states and 2356 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:08,524 INFO L93 Difference]: Finished difference Result 2083 states and 2356 transitions. [2022-07-14 07:07:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:08,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-14 07:07:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:08,529 INFO L225 Difference]: With dead ends: 2083 [2022-07-14 07:07:08,529 INFO L226 Difference]: Without dead ends: 2081 [2022-07-14 07:07:08,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:08,530 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 1 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1945 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:08,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5063 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1945 Unchecked, 0.0s Time] [2022-07-14 07:07:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-07-14 07:07:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2081. [2022-07-14 07:07:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 1026 states have (on average 2.1306042884990255) internal successors, (2186), 1996 states have internal predecessors, (2186), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2353 transitions. [2022-07-14 07:07:08,558 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2353 transitions. Word has length 17 [2022-07-14 07:07:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:08,559 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2353 transitions. [2022-07-14 07:07:08,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2353 transitions. [2022-07-14 07:07:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 07:07:08,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:08,560 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:08,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 07:07:08,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:08,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494955, now seen corresponding path program 1 times [2022-07-14 07:07:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:08,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435035939] [2022-07-14 07:07:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:08,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:08,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:08,779 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) [2022-07-14 07:07:08,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 07:07:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 07:07:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:10,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435035939] [2022-07-14 07:07:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435035939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:10,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:10,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-14 07:07:10,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588659826] [2022-07-14 07:07:10,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:10,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 07:07:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 07:07:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:07:10,009 INFO L87 Difference]: Start difference. First operand 2081 states and 2353 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:10,585 INFO L93 Difference]: Finished difference Result 2100 states and 2376 transitions. [2022-07-14 07:07:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:07:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-14 07:07:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:10,591 INFO L225 Difference]: With dead ends: 2100 [2022-07-14 07:07:10,591 INFO L226 Difference]: Without dead ends: 2090 [2022-07-14 07:07:10,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-07-14 07:07:10,592 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 45 mSDsluCounter, 11692 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 14033 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:10,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 14033 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-07-14 07:07:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2090. [2022-07-14 07:07:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1035 states have (on average 2.1207729468599035) internal successors, (2195), 2005 states have internal predecessors, (2195), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2362 transitions. [2022-07-14 07:07:10,615 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2362 transitions. Word has length 17 [2022-07-14 07:07:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:10,616 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 2362 transitions. [2022-07-14 07:07:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2362 transitions. [2022-07-14 07:07:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 07:07:10,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:10,617 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:10,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:10,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:10,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1174908437, now seen corresponding path program 2 times [2022-07-14 07:07:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682317572] [2022-07-14 07:07:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:10,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:10,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:10,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 07:07:14,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 07:07:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 07:07:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:14,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,669 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 07:07:14,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-07-14 07:07:14,696 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-14 07:07:14,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2022-07-14 07:07:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:14,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 07:07:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-14 07:07:14,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:14,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682317572] [2022-07-14 07:07:14,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682317572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:14,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:14,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:07:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861086835] [2022-07-14 07:07:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:14,989 INFO L87 Difference]: Start difference. First operand 2090 states and 2362 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:15,022 INFO L93 Difference]: Finished difference Result 2089 states and 2361 transitions. [2022-07-14 07:07:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-14 07:07:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:15,028 INFO L225 Difference]: With dead ends: 2089 [2022-07-14 07:07:15,028 INFO L226 Difference]: Without dead ends: 2089 [2022-07-14 07:07:15,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:15,028 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 6 mSDsluCounter, 2769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5104 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1902 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:15,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5104 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 1902 Unchecked, 0.0s Time] [2022-07-14 07:07:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-07-14 07:07:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2022-07-14 07:07:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1035 states have (on average 2.119806763285024) internal successors, (2194), 2004 states have internal predecessors, (2194), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2361 transitions. [2022-07-14 07:07:15,050 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2361 transitions. Word has length 23 [2022-07-14 07:07:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 2361 transitions. [2022-07-14 07:07:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2361 transitions. [2022-07-14 07:07:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:07:15,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:15,052 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:15,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-14 07:07:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:15,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash -489338443, now seen corresponding path program 1 times [2022-07-14 07:07:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787457804] [2022-07-14 07:07:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:15,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:15,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:15,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 07:07:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 07:07:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:16,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:16,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787457804] [2022-07-14 07:07:16,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787457804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:16,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:16,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-14 07:07:16,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096126752] [2022-07-14 07:07:16,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:16,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 07:07:16,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 07:07:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-14 07:07:16,929 INFO L87 Difference]: Start difference. First operand 2089 states and 2361 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:19,175 INFO L93 Difference]: Finished difference Result 2123 states and 2405 transitions. [2022-07-14 07:07:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 07:07:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-14 07:07:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:19,181 INFO L225 Difference]: With dead ends: 2123 [2022-07-14 07:07:19,181 INFO L226 Difference]: Without dead ends: 2107 [2022-07-14 07:07:19,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=890, Invalid=1866, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 07:07:19,182 INFO L413 NwaCegarLoop]: 2343 mSDtfsCounter, 115 mSDsluCounter, 25739 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 28082 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:19,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 28082 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 07:07:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-07-14 07:07:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2107. [2022-07-14 07:07:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1053 states have (on average 2.100664767331434) internal successors, (2212), 2022 states have internal predecessors, (2212), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2379 transitions. [2022-07-14 07:07:19,203 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2379 transitions. Word has length 25 [2022-07-14 07:07:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:19,203 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2379 transitions. [2022-07-14 07:07:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2379 transitions. [2022-07-14 07:07:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:07:19,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:19,204 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:19,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:19,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:19,426 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314357, now seen corresponding path program 2 times [2022-07-14 07:07:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998287957] [2022-07-14 07:07:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:19,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:19,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 07:07:21,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 07:07:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:21,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 07:07:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:22,231 INFO L356 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2022-07-14 07:07:22,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 93 treesize of output 128 [2022-07-14 07:07:24,767 INFO L356 Elim1Store]: treesize reduction 55, result has 42.7 percent of original size [2022-07-14 07:07:24,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 75 [2022-07-14 07:07:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-14 07:07:25,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:25,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998287957] [2022-07-14 07:07:25,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998287957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:25,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:25,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:07:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539153548] [2022-07-14 07:07:25,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:25,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:25,028 INFO L87 Difference]: Start difference. First operand 2107 states and 2379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:27,635 INFO L93 Difference]: Finished difference Result 2106 states and 2378 transitions. [2022-07-14 07:07:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-07-14 07:07:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:27,641 INFO L225 Difference]: With dead ends: 2106 [2022-07-14 07:07:27,642 INFO L226 Difference]: Without dead ends: 2106 [2022-07-14 07:07:27,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:27,642 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5046 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 980 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:27,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5046 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 971 Invalid, 0 Unknown, 980 Unchecked, 2.6s Time] [2022-07-14 07:07:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-07-14 07:07:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2022-07-14 07:07:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 1053 states have (on average 2.0997150997150995) internal successors, (2211), 2021 states have internal predecessors, (2211), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2378 transitions. [2022-07-14 07:07:27,679 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2378 transitions. Word has length 37 [2022-07-14 07:07:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:27,680 INFO L495 AbstractCegarLoop]: Abstraction has 2106 states and 2378 transitions. [2022-07-14 07:07:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2378 transitions. [2022-07-14 07:07:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:07:27,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:27,681 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:27,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:27,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:27,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314358, now seen corresponding path program 1 times [2022-07-14 07:07:27,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362349136] [2022-07-14 07:07:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:27,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:27,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 07:07:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 07:07:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:29,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:31,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:31,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362349136] [2022-07-14 07:07:31,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362349136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:31,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:31,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-14 07:07:31,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401743600] [2022-07-14 07:07:31,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:31,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-14 07:07:31,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-14 07:07:31,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 07:07:31,440 INFO L87 Difference]: Start difference. First operand 2106 states and 2378 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:42,326 INFO L93 Difference]: Finished difference Result 2170 states and 2464 transitions. [2022-07-14 07:07:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-14 07:07:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-07-14 07:07:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:42,331 INFO L225 Difference]: With dead ends: 2170 [2022-07-14 07:07:42,331 INFO L226 Difference]: Without dead ends: 2142 [2022-07-14 07:07:42,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3512, Invalid=7830, Unknown=0, NotChecked=0, Total=11342 [2022-07-14 07:07:42,333 INFO L413 NwaCegarLoop]: 2348 mSDtfsCounter, 338 mSDsluCounter, 63254 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 65602 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:42,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 65602 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-14 07:07:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-07-14 07:07:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2142. [2022-07-14 07:07:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1089 states have (on average 2.0633608815426996) internal successors, (2247), 2057 states have internal predecessors, (2247), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-14 07:07:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2414 transitions. [2022-07-14 07:07:42,353 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2414 transitions. Word has length 37 [2022-07-14 07:07:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:42,353 INFO L495 AbstractCegarLoop]: Abstraction has 2142 states and 2414 transitions. [2022-07-14 07:07:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2414 transitions. [2022-07-14 07:07:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 07:07:42,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:42,354 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:42,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-14 07:07:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:42,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:07:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 283062838, now seen corresponding path program 2 times [2022-07-14 07:07:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305430325] [2022-07-14 07:07:42,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:42,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:42,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 07:07:46,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 07:07:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 07:07:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:46,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 34 [2022-07-14 07:07:46,751 INFO L356 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2022-07-14 07:07:46,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 93 treesize of output 128 [2022-07-14 07:07:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:51,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 07:07:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-07-14 07:07:51,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:51,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305430325] [2022-07-14 07:07:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305430325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:51,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:51,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443225009] [2022-07-14 07:07:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:51,570 INFO L87 Difference]: Start difference. First operand 2142 states and 2414 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:59,873 INFO L93 Difference]: Finished difference Result 3532 states and 4049 transitions. [2022-07-14 07:07:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-07-14 07:07:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:59,885 INFO L225 Difference]: With dead ends: 3532 [2022-07-14 07:07:59,885 INFO L226 Difference]: Without dead ends: 3532 [2022-07-14 07:07:59,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:59,886 INFO L413 NwaCegarLoop]: 1063 mSDtfsCounter, 2704 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 4208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:59,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2706 Valid, 3076 Invalid, 4208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2894 Invalid, 0 Unknown, 1270 Unchecked, 8.2s Time] [2022-07-14 07:07:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2022-07-14 07:07:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2867. [2022-07-14 07:07:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 1748 states have (on average 2.0635011441647597) internal successors, (3607), 2717 states have internal predecessors, (3607), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-07-14 07:07:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 3888 transitions. [2022-07-14 07:07:59,924 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 3888 transitions. Word has length 61 [2022-07-14 07:07:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:59,925 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 3888 transitions. [2022-07-14 07:07:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 07:07:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 3888 transitions. [2022-07-14 07:07:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 07:07:59,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:59,926 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:59,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:00,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:00,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-14 07:08:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1440500246, now seen corresponding path program 1 times [2022-07-14 07:08:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802539465] [2022-07-14 07:08:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:00,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:00,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:00,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:00,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 07:08:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 07:08:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:02,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:10,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802539465] [2022-07-14 07:08:10,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802539465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:08:10,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:10,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-07-14 07:08:10,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317776418] [2022-07-14 07:08:10,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:10,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-14 07:08:10,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-14 07:08:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2022-07-14 07:08:10,085 INFO L87 Difference]: Start difference. First operand 2867 states and 3888 transitions. Second operand has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)