./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/ldv-memsafety/memleaks_test22_3-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14e3e63e231fa0c862b0912d52fb4325a0198eb4d9a43387e9996f85700980cb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:10:03,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:10:03,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:10:04,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:10:04,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:10:04,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:10:04,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:10:04,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:10:04,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:10:04,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:10:04,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:10:04,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:10:04,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:10:04,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:10:04,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:10:04,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:10:04,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:10:04,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:10:04,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:10:04,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:10:04,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:10:04,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:10:04,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:10:04,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:10:04,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:10:04,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:10:04,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:10:04,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:10:04,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:10:04,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:10:04,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:10:04,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:10:04,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:10:04,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:10:04,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:10:04,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:10:04,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:10:04,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:10:04,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:10:04,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:10:04,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:10:04,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:10:04,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:10:04,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:10:04,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:10:04,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:10:04,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:10:04,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:10:04,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:10:04,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:10:04,100 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:10:04,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:10:04,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:10:04,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:10:04,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:10:04,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:10:04,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:10:04,102 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:10:04,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:10:04,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:10:04,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:10:04,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:10:04,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:10:04,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:10:04,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:10:04,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:10:04,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:10:04,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:10:04,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:10:04,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:10:04,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:10:04,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:10:04,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:10:04,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14e3e63e231fa0c862b0912d52fb4325a0198eb4d9a43387e9996f85700980cb [2021-12-22 00:10:04,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:10:04,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:10:04,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:10:04,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:10:04,365 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:10:04,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-2.i [2021-12-22 00:10:04,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1629453/1fcf12610d2349fda72740395135a440/FLAGfce73d3de [2021-12-22 00:10:04,898 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:10:04,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-2.i [2021-12-22 00:10:04,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1629453/1fcf12610d2349fda72740395135a440/FLAGfce73d3de [2021-12-22 00:10:05,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1629453/1fcf12610d2349fda72740395135a440 [2021-12-22 00:10:05,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:10:05,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:10:05,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:10:05,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:10:05,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:10:05,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:10:05" (1/1) ... [2021-12-22 00:10:05,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b507b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:05, skipping insertion in model container [2021-12-22 00:10:05,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:10:05" (1/1) ... [2021-12-22 00:10:05,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:10:05,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:10:05,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:10:05,677 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-22 00:10:05,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@365484a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:05, skipping insertion in model container [2021-12-22 00:10:05,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:10:05,679 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 00:10:05,681 INFO L158 Benchmark]: Toolchain (without parser) took 419.83ms. Allocated memory is still 98.6MB. Free memory was 68.6MB in the beginning and 71.4MB in the end (delta: -2.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 00:10:05,682 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 00:10:05,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 416.93ms. Allocated memory is still 98.6MB. Free memory was 68.4MB in the beginning and 71.4MB in the end (delta: -3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 00:10:05,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 416.93ms. Allocated memory is still 98.6MB. Free memory was 68.4MB in the beginning and 71.4MB in the end (delta: -3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/ldv-memsafety/memleaks_test22_3-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14e3e63e231fa0c862b0912d52fb4325a0198eb4d9a43387e9996f85700980cb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:10:07,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:10:07,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:10:07,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:10:07,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:10:07,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:10:07,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:10:07,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:10:07,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:10:07,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:10:07,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:10:07,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:10:07,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:10:07,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:10:07,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:10:07,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:10:07,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:10:07,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:10:07,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:10:07,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:10:07,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:10:07,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:10:07,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:10:07,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:10:07,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:10:07,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:10:07,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:10:07,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:10:07,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:10:07,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:10:07,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:10:07,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:10:07,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:10:07,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:10:07,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:10:07,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:10:07,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:10:07,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:10:07,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:10:07,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:10:07,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:10:07,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 00:10:07,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:10:07,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:10:07,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:10:07,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:10:07,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:10:07,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:10:07,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:10:07,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:10:07,581 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:10:07,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:10:07,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:10:07,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:10:07,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:10:07,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:10:07,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:10:07,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:10:07,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:10:07,583 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:10:07,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:10:07,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:10:07,584 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 00:10:07,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 00:10:07,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:10:07,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:10:07,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:10:07,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:10:07,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:10:07,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:10:07,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:10:07,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:10:07,586 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 00:10:07,586 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 00:10:07,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:10:07,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 00:10:07,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14e3e63e231fa0c862b0912d52fb4325a0198eb4d9a43387e9996f85700980cb [2021-12-22 00:10:07,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:10:07,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:10:07,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:10:07,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:10:07,929 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:10:07,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-2.i [2021-12-22 00:10:07,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cad88a0/7057791fcdb044639bd9a42ff50a74c4/FLAGd6d0a0f1c [2021-12-22 00:10:08,517 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:10:08,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-2.i [2021-12-22 00:10:08,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cad88a0/7057791fcdb044639bd9a42ff50a74c4/FLAGd6d0a0f1c [2021-12-22 00:10:08,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cad88a0/7057791fcdb044639bd9a42ff50a74c4 [2021-12-22 00:10:08,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:10:08,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:10:08,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:10:08,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:10:08,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:10:08,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:10:08" (1/1) ... [2021-12-22 00:10:08,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c980ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:08, skipping insertion in model container [2021-12-22 00:10:08,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:10:08" (1/1) ... [2021-12-22 00:10:09,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:10:09,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:10:09,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:10:09,434 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 00:10:09,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:10:09,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:10:09,516 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:10:09,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:10:09,626 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:10:09,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09 WrapperNode [2021-12-22 00:10:09,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:10:09,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:10:09,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:10:09,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:10:09,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,700 INFO L137 Inliner]: procedures = 165, calls = 70, calls flagged for inlining = 22, calls inlined = 14, statements flattened = 100 [2021-12-22 00:10:09,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:10:09,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:10:09,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:10:09,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:10:09,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:10:09,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:10:09,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:10:09,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:10:09,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (1/1) ... [2021-12-22 00:10:09,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:10:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:10:09,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 00:10:09,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 00:10:09,826 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-22 00:10:09,826 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-22 00:10:09,826 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 00:10:09,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 00:10:09,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-12-22 00:10:09,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-12-22 00:10:09,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:10:09,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:10:09,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:10:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:10:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 00:10:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:10:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:10:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:10:09,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:10:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 00:10:09,964 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:10:09,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:10:10,326 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:10:10,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:10:10,331 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 00:10:10,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:10:10 BoogieIcfgContainer [2021-12-22 00:10:10,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:10:10,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:10:10,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:10:10,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:10:10,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:10:08" (1/3) ... [2021-12-22 00:10:10,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5278ffc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:10:10, skipping insertion in model container [2021-12-22 00:10:10,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:10:09" (2/3) ... [2021-12-22 00:10:10,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5278ffc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:10:10, skipping insertion in model container [2021-12-22 00:10:10,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:10:10" (3/3) ... [2021-12-22 00:10:10,340 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_3-2.i [2021-12-22 00:10:10,344 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:10:10,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-22 00:10:10,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:10:10,397 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 00:10:10,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-22 00:10:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:10:10,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:10,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:10,418 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:10,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:10,423 INFO L85 PathProgramCache]: Analyzing trace with hash 265003773, now seen corresponding path program 1 times [2021-12-22 00:10:10,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:10,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107698693] [2021-12-22 00:10:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:10,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:10,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:10,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 00:10:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 00:10:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:10,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:10,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:10,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107698693] [2021-12-22 00:10:10,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107698693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:10,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:10,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:10:10,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447198102] [2021-12-22 00:10:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:10,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:10:10,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:10:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:10:10,705 INFO L87 Difference]: Start difference. First operand has 77 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-22 00:10:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:10,970 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2021-12-22 00:10:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:10:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2021-12-22 00:10:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:10,979 INFO L225 Difference]: With dead ends: 101 [2021-12-22 00:10:10,980 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 00:10:10,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:10:10,984 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 52 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:10,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 283 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:10:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 00:10:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-12-22 00:10:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 72 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-12-22 00:10:11,019 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 10 [2021-12-22 00:10:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:11,019 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-12-22 00:10:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-22 00:10:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-12-22 00:10:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:10:11,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:11,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:11,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:11,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:11,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 293632924, now seen corresponding path program 1 times [2021-12-22 00:10:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696214210] [2021-12-22 00:10:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:11,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:11,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 00:10:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 00:10:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:11,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:11,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696214210] [2021-12-22 00:10:11,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696214210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:11,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:11,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:10:11,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803407932] [2021-12-22 00:10:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:10:11,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:10:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:10:11,416 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (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) [2021-12-22 00:10:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:11,439 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-12-22 00:10:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:10:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (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 10 [2021-12-22 00:10:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:11,441 INFO L225 Difference]: With dead ends: 84 [2021-12-22 00:10:11,441 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 00:10:11,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:10:11,443 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 3 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:11,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 330 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 00:10:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-12-22 00:10:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.54) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-22 00:10:11,451 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 10 [2021-12-22 00:10:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-22 00:10:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (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) [2021-12-22 00:10:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-22 00:10:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 00:10:11,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:11,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:11,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:11,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:11,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -374817580, now seen corresponding path program 1 times [2021-12-22 00:10:11,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634197049] [2021-12-22 00:10:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:11,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:11,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:11,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 00:10:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 00:10:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:11,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:11,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:11,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634197049] [2021-12-22 00:10:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634197049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:11,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:11,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:10:11,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938975018] [2021-12-22 00:10:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:11,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:10:11,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:10:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:10:11,833 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-22 00:10:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:12,111 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-12-22 00:10:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:10:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 11 [2021-12-22 00:10:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:12,113 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:10:12,113 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:10:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:10:12,114 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 41 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 365 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:10:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:10:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-12-22 00:10:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.52) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2021-12-22 00:10:12,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 11 [2021-12-22 00:10:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:12,122 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2021-12-22 00:10:12,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-22 00:10:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2021-12-22 00:10:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 00:10:12,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:12,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:12,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:12,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:12,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash 700915977, now seen corresponding path program 1 times [2021-12-22 00:10:12,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:12,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712948478] [2021-12-22 00:10:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:12,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:12,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:12,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 00:10:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:10:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:12,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:12,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712948478] [2021-12-22 00:10:12,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712948478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:12,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:12,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:10:12,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684800100] [2021-12-22 00:10:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:12,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:10:12,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:10:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:10:12,438 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:12,463 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-12-22 00:10:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:10:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-22 00:10:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:12,465 INFO L225 Difference]: With dead ends: 83 [2021-12-22 00:10:12,465 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 00:10:12,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:10:12,472 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 19 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:12,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 312 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 00:10:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-12-22 00:10:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.5) internal successors, (75), 69 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-12-22 00:10:12,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 14 [2021-12-22 00:10:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:12,486 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-12-22 00:10:12,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-12-22 00:10:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 00:10:12,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:12,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:12,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:12,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:12,691 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash 504402472, now seen corresponding path program 1 times [2021-12-22 00:10:12,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:12,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47314725] [2021-12-22 00:10:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:12,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:12,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:12,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 00:10:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:10:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:12,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:12,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47314725] [2021-12-22 00:10:12,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47314725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:12,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:12,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:10:12,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307031773] [2021-12-22 00:10:12,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:12,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:10:12,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:10:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:10:12,849 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:12,911 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-22 00:10:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:10:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-22 00:10:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:12,914 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:10:12,914 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:10:12,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:10:12,917 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:12,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 384 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:10:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-12-22 00:10:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.462962962962963) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:10:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-12-22 00:10:12,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 14 [2021-12-22 00:10:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-12-22 00:10:12,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-12-22 00:10:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:10:12,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:12,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:12,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:13,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,148 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash 458362539, now seen corresponding path program 1 times [2021-12-22 00:10:13,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:13,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988831778] [2021-12-22 00:10:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:13,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:13,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 00:10:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:10:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:13,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:13,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:13,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988831778] [2021-12-22 00:10:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988831778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:13,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:10:13,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604283755] [2021-12-22 00:10:13,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:13,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:10:13,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:10:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:10:13,269 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 4 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) [2021-12-22 00:10:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:13,295 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-12-22 00:10:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:10:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 16 [2021-12-22 00:10:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:13,297 INFO L225 Difference]: With dead ends: 88 [2021-12-22 00:10:13,297 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 00:10:13,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:10:13,298 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 17 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:13,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 232 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 00:10:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-12-22 00:10:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 75 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:10:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-12-22 00:10:13,310 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 16 [2021-12-22 00:10:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:13,310 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-12-22 00:10:13,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2021-12-22 00:10:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-12-22 00:10:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:10:13,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:13,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:13,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:13,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1265077694, now seen corresponding path program 1 times [2021-12-22 00:10:13,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:13,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597882791] [2021-12-22 00:10:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:13,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:13,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:13,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 00:10:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:10:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:13,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:13,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:13,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597882791] [2021-12-22 00:10:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597882791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:10:13,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:10:13,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 00:10:13,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470013026] [2021-12-22 00:10:13,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:10:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:10:13,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:10:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:10:13,715 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-22 00:10:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:13,786 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-12-22 00:10:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:10:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 [2021-12-22 00:10:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:13,788 INFO L225 Difference]: With dead ends: 91 [2021-12-22 00:10:13,788 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 00:10:13,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:10:13,789 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 34 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:13,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 343 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 00:10:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-22 00:10:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 78 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:10:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-22 00:10:13,793 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 17 [2021-12-22 00:10:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:13,793 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-22 00:10:13,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-22 00:10:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-22 00:10:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:10:13,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:13,794 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:13,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:13,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 876788587, now seen corresponding path program 2 times [2021-12-22 00:10:13,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631527002] [2021-12-22 00:10:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:10:13,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:13,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:13,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 00:10:14,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:10:14,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:10:14,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:10:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:14,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 00:10:14,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:14,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631527002] [2021-12-22 00:10:14,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631527002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:14,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:14,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:10:14,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487374459] [2021-12-22 00:10:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:14,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:10:14,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:10:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:10:14,161 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-22 00:10:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:14,419 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-12-22 00:10:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:10:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 20 [2021-12-22 00:10:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:14,420 INFO L225 Difference]: With dead ends: 94 [2021-12-22 00:10:14,420 INFO L226 Difference]: Without dead ends: 94 [2021-12-22 00:10:14,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:10:14,421 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 35 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:14,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 370 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:10:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-22 00:10:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-12-22 00:10:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:10:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-12-22 00:10:14,425 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 20 [2021-12-22 00:10:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:14,425 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-12-22 00:10:14,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-22 00:10:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-12-22 00:10:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:10:14,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:14,426 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:14,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:14,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:14,635 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 876788588, now seen corresponding path program 1 times [2021-12-22 00:10:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:14,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226681596] [2021-12-22 00:10:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:14,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:14,638 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) [2021-12-22 00:10:14,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 00:10:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:14,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 00:10:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:14,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:15,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226681596] [2021-12-22 00:10:15,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226681596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:10:15,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:10:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-22 00:10:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829312849] [2021-12-22 00:10:15,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:10:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 00:10:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 00:10:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:10:15,002 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2021-12-22 00:10:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:15,237 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-12-22 00:10:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:10:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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 20 [2021-12-22 00:10:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:15,239 INFO L225 Difference]: With dead ends: 96 [2021-12-22 00:10:15,240 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 00:10:15,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:10:15,241 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 32 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:15,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 550 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:10:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 00:10:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-12-22 00:10:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.375) internal successors, (88), 83 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:10:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-12-22 00:10:15,246 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 20 [2021-12-22 00:10:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-12-22 00:10:15,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2021-12-22 00:10:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-12-22 00:10:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:10:15,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:15,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:15,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:15,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:15,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1295948282, now seen corresponding path program 1 times [2021-12-22 00:10:15,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:15,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902835108] [2021-12-22 00:10:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:15,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:15,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:15,458 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) [2021-12-22 00:10:15,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 00:10:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:10:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:10:15,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:15,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:15,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902835108] [2021-12-22 00:10:15,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902835108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:15,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:15,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:10:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645497405] [2021-12-22 00:10:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:15,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:10:15,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:10:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:10:15,572 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 00:10:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:15,673 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-12-22 00:10:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:10:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-12-22 00:10:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:15,674 INFO L225 Difference]: With dead ends: 99 [2021-12-22 00:10:15,674 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 00:10:15,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:10:15,675 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:15,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:10:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 00:10:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-12-22 00:10:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 75 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-12-22 00:10:15,679 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 22 [2021-12-22 00:10:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-12-22 00:10:15,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 00:10:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-12-22 00:10:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 00:10:15,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:15,680 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:15,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-22 00:10:15,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:15,889 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1092187508, now seen corresponding path program 2 times [2021-12-22 00:10:15,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:15,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258732970] [2021-12-22 00:10:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:10:15,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:15,891 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) [2021-12-22 00:10:15,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 00:10:15,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:10:15,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:10:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 00:10:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:16,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 00:10:16,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:16,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258732970] [2021-12-22 00:10:16,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258732970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:16,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:16,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:10:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061479136] [2021-12-22 00:10:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:16,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:10:16,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:10:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:10:16,221 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-12-22 00:10:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:16,584 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-12-22 00:10:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:10:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 26 [2021-12-22 00:10:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:16,585 INFO L225 Difference]: With dead ends: 96 [2021-12-22 00:10:16,585 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 00:10:16,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:10:16,586 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:16,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 431 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:10:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 00:10:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-12-22 00:10:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-12-22 00:10:16,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 26 [2021-12-22 00:10:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:16,590 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-12-22 00:10:16,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-12-22 00:10:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-12-22 00:10:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 00:10:16,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:16,591 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:16,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:16,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:16,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2084512317, now seen corresponding path program 1 times [2021-12-22 00:10:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180201636] [2021-12-22 00:10:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:16,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:16,802 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) [2021-12-22 00:10:16,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 00:10:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 00:10:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:17,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:17,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:17,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180201636] [2021-12-22 00:10:17,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180201636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:10:17,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:10:17,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-22 00:10:17,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12856646] [2021-12-22 00:10:17,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:10:17,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 00:10:17,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 00:10:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-12-22 00:10:17,642 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:18,113 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-22 00:10:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 00:10:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 00:10:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:18,114 INFO L225 Difference]: With dead ends: 87 [2021-12-22 00:10:18,114 INFO L226 Difference]: Without dead ends: 87 [2021-12-22 00:10:18,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2021-12-22 00:10:18,116 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 15 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 958 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:10:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-22 00:10:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-22 00:10:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-12-22 00:10:18,119 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 30 [2021-12-22 00:10:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:18,119 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-12-22 00:10:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-12-22 00:10:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:10:18,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:18,120 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:18,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:18,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:18,321 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -532510371, now seen corresponding path program 2 times [2021-12-22 00:10:18,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:18,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528462768] [2021-12-22 00:10:18,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:10:18,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:18,323 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) [2021-12-22 00:10:18,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 00:10:18,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:10:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:10:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:10:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:18,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:18,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:18,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528462768] [2021-12-22 00:10:18,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528462768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:18,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:18,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 00:10:18,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137397380] [2021-12-22 00:10:18,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:18,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:10:18,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:18,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:10:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:10:18,569 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:18,800 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-12-22 00:10:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:10:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-22 00:10:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:18,801 INFO L225 Difference]: With dead ends: 88 [2021-12-22 00:10:18,801 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 00:10:18,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:10:18,802 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:18,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 341 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:10:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 00:10:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-12-22 00:10:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 78 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-22 00:10:18,805 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 36 [2021-12-22 00:10:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:18,806 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-22 00:10:18,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-22 00:10:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:10:18,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:18,807 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:18,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:19,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash -532510370, now seen corresponding path program 1 times [2021-12-22 00:10:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:19,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251624018] [2021-12-22 00:10:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:19,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:19,018 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) [2021-12-22 00:10:19,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 00:10:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 00:10:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:19,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:19,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:19,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251624018] [2021-12-22 00:10:19,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251624018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:19,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:10:19,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658631161] [2021-12-22 00:10:19,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:10:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:10:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:10:19,467 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:19,814 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-12-22 00:10:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:10:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-22 00:10:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:19,816 INFO L225 Difference]: With dead ends: 90 [2021-12-22 00:10:19,816 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 00:10:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:10:19,817 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 430 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:10:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 00:10:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-12-22 00:10:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 76 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-12-22 00:10:19,820 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 36 [2021-12-22 00:10:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-12-22 00:10:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-12-22 00:10:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 00:10:19,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:19,822 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:19,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:20,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:20,033 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1979095631, now seen corresponding path program 1 times [2021-12-22 00:10:20,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:20,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133500670] [2021-12-22 00:10:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:20,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:20,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:20,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:20,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 00:10:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:20,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 00:10:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:20,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:20,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133500670] [2021-12-22 00:10:20,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133500670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:20,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:20,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:10:20,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759437563] [2021-12-22 00:10:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:20,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:10:20,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:10:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:10:20,281 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:20,311 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-12-22 00:10:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:10:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-22 00:10:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:20,312 INFO L225 Difference]: With dead ends: 83 [2021-12-22 00:10:20,312 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 00:10:20,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:10:20,313 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 21 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:20,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 304 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 00:10:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-22 00:10:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-12-22 00:10:20,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 36 [2021-12-22 00:10:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:20,317 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-12-22 00:10:20,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-12-22 00:10:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 00:10:20,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:20,318 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:20,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:20,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:20,529 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2103088419, now seen corresponding path program 1 times [2021-12-22 00:10:20,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:20,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644613577] [2021-12-22 00:10:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:20,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:20,532 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:20,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 00:10:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:10:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:20,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:20,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644613577] [2021-12-22 00:10:20,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644613577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:20,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:20,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:10:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892334336] [2021-12-22 00:10:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:10:20,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:10:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:10:20,775 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:20,811 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-12-22 00:10:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:10:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-22 00:10:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:20,812 INFO L225 Difference]: With dead ends: 83 [2021-12-22 00:10:20,812 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 00:10:20,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:10:20,812 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 27 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:20,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 354 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 00:10:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-22 00:10:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.253968253968254) internal successors, (79), 75 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:10:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-12-22 00:10:20,816 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 38 [2021-12-22 00:10:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:20,816 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-12-22 00:10:20,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:10:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-12-22 00:10:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:10:20,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:20,817 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:20,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:21,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:21,028 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash 633351514, now seen corresponding path program 1 times [2021-12-22 00:10:21,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636456201] [2021-12-22 00:10:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:21,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:21,030 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:21,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 00:10:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 00:10:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:21,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:21,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:21,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636456201] [2021-12-22 00:10:21,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636456201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:21,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:21,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 00:10:21,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952512562] [2021-12-22 00:10:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:21,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 00:10:21,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 00:10:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:10:21,420 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:21,630 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-12-22 00:10:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:10:21,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-22 00:10:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:21,631 INFO L225 Difference]: With dead ends: 109 [2021-12-22 00:10:21,631 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 00:10:21,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:10:21,632 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:21,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 223 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2021-12-22 00:10:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 00:10:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2021-12-22 00:10:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 86 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-12-22 00:10:21,636 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 46 [2021-12-22 00:10:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:21,636 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-12-22 00:10:21,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-12-22 00:10:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 00:10:21,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:21,636 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:21,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:21,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:21,837 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash 633351515, now seen corresponding path program 1 times [2021-12-22 00:10:21,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:21,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375612282] [2021-12-22 00:10:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:21,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:21,840 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:21,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 00:10:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 00:10:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:22,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:22,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:22,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375612282] [2021-12-22 00:10:22,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375612282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:22,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:22,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:10:22,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816996153] [2021-12-22 00:10:22,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:22,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:10:22,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:10:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:10:22,421 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:22,766 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-12-22 00:10:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:10:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-22 00:10:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:22,768 INFO L225 Difference]: With dead ends: 97 [2021-12-22 00:10:22,768 INFO L226 Difference]: Without dead ends: 97 [2021-12-22 00:10:22,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-22 00:10:22,768 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 126 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:22,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 332 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2021-12-22 00:10:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-22 00:10:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-12-22 00:10:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 86 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 00:10:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-12-22 00:10:22,772 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 46 [2021-12-22 00:10:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:22,772 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-12-22 00:10:22,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-12-22 00:10:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 00:10:22,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:22,773 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:22,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:22,980 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 438707658, now seen corresponding path program 1 times [2021-12-22 00:10:22,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412881024] [2021-12-22 00:10:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:22,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:22,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:22,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 00:10:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:10:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:23,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:23,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412881024] [2021-12-22 00:10:23,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412881024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:23,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:23,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:10:23,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170289275] [2021-12-22 00:10:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:10:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:10:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:10:23,351 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:10:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:23,428 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-12-22 00:10:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:10:23,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-22 00:10:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:23,429 INFO L225 Difference]: With dead ends: 97 [2021-12-22 00:10:23,429 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:10:23,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:10:23,430 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 45 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:23,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 418 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:10:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:10:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-22 00:10:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 84 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-22 00:10:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-22 00:10:23,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 51 [2021-12-22 00:10:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:23,434 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-22 00:10:23,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:10:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-22 00:10:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 00:10:23,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:23,435 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:23,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:23,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:23,647 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash 885076734, now seen corresponding path program 1 times [2021-12-22 00:10:23,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:23,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400597878] [2021-12-22 00:10:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:23,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:23,649 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 00:10:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 00:10:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:23,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:24,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:24,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:24,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400597878] [2021-12-22 00:10:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400597878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:24,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:24,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:10:24,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236711786] [2021-12-22 00:10:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:24,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:10:24,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:10:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:10:24,097 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:24,441 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-12-22 00:10:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:10:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-22 00:10:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:24,443 INFO L225 Difference]: With dead ends: 119 [2021-12-22 00:10:24,443 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 00:10:24,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-22 00:10:24,444 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:24,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 278 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2021-12-22 00:10:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 00:10:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-12-22 00:10:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 100 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 00:10:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-12-22 00:10:24,447 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 52 [2021-12-22 00:10:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:24,447 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-12-22 00:10:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-12-22 00:10:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 00:10:24,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:24,448 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:24,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:24,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:24,656 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 885076735, now seen corresponding path program 1 times [2021-12-22 00:10:24,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755894771] [2021-12-22 00:10:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:24,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:24,659 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:24,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-22 00:10:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 00:10:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:24,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:25,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:25,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755894771] [2021-12-22 00:10:25,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755894771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:25,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:25,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 00:10:25,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144444964] [2021-12-22 00:10:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:25,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:10:25,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:10:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:10:25,316 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:25,646 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2021-12-22 00:10:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:10:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-22 00:10:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:25,648 INFO L225 Difference]: With dead ends: 131 [2021-12-22 00:10:25,648 INFO L226 Difference]: Without dead ends: 131 [2021-12-22 00:10:25,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:10:25,649 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 345 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-12-22 00:10:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-22 00:10:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-12-22 00:10:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 116 states have internal predecessors, (130), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 00:10:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2021-12-22 00:10:25,655 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 52 [2021-12-22 00:10:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:25,655 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2021-12-22 00:10:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2021-12-22 00:10:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 00:10:25,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:25,656 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:25,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:25,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:25,867 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 516809115, now seen corresponding path program 1 times [2021-12-22 00:10:25,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:25,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546221837] [2021-12-22 00:10:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:25,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:25,870 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:25,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-22 00:10:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 00:10:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:26,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:10:26,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546221837] [2021-12-22 00:10:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546221837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:10:26,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:10:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 00:10:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803538465] [2021-12-22 00:10:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:10:26,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:10:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:10:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:10:26,596 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:26,910 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-12-22 00:10:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:10:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-12-22 00:10:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:26,912 INFO L225 Difference]: With dead ends: 130 [2021-12-22 00:10:26,912 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 00:10:26,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-22 00:10:26,913 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:26,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 429 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2021-12-22 00:10:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 00:10:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2021-12-22 00:10:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 116 states have internal predecessors, (129), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 00:10:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-12-22 00:10:26,916 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 55 [2021-12-22 00:10:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:26,916 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-12-22 00:10:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:10:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-12-22 00:10:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 00:10:26,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:26,917 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:26,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:27,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:27,133 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1999474558, now seen corresponding path program 1 times [2021-12-22 00:10:27,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:27,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082345595] [2021-12-22 00:10:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:27,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:27,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:27,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-22 00:10:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 00:10:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:27,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:10:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:27,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 00:10:27,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082345595] [2021-12-22 00:10:27,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082345595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:10:27,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:10:27,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-12-22 00:10:27,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843996979] [2021-12-22 00:10:27,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:10:27,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:10:27,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:10:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:10:27,795 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 00:10:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:28,117 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2021-12-22 00:10:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:10:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-12-22 00:10:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:28,119 INFO L225 Difference]: With dead ends: 137 [2021-12-22 00:10:28,119 INFO L226 Difference]: Without dead ends: 137 [2021-12-22 00:10:28,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-12-22 00:10:28,119 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:28,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 329 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 220 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-22 00:10:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-22 00:10:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-12-22 00:10:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 120 states have internal predecessors, (130), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 00:10:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-12-22 00:10:28,123 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 59 [2021-12-22 00:10:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-12-22 00:10:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 00:10:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-12-22 00:10:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 00:10:28,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:28,124 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-22 00:10:28,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:10:28,339 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1197288958, now seen corresponding path program 1 times [2021-12-22 00:10:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898741001] [2021-12-22 00:10:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:28,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:28,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:28,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-22 00:10:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-22 00:10:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:28,854 INFO L387 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 14 treesize of output 10 [2021-12-22 00:10:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:28,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 24 [2021-12-22 00:10:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:28,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:28,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:29,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-22 00:10:34,822 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1756 (_ BitVec 32)) (v_ArrVal_1757 (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_1756) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_1757)) |c_#memory_$Pointer$.offset|)) is different from true [2021-12-22 00:10:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:34,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 00:10:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:35,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 45 [2021-12-22 00:10:35,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:10:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:35,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:36,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898741001] [2021-12-22 00:10:36,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898741001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:10:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314230440] [2021-12-22 00:10:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:36,217 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:10:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:10:36,219 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:10:36,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-22 00:10:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-22 00:10:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:37,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:10:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 24 [2021-12-22 00:10:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 24 [2021-12-22 00:10:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:37,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-22 00:10:40,699 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1756 (_ BitVec 32)) (v_ArrVal_1953 (_ BitVec 32))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_1756) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_1953)))) is different from true [2021-12-22 00:10:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:40,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 00:10:40,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 39 [2021-12-22 00:10:40,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:10:40,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 00:10:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:41,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:42,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [314230440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:10:42,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:10:42,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 44 [2021-12-22 00:10:42,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793425448] [2021-12-22 00:10:42,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:10:42,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-22 00:10:42,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:10:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-22 00:10:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3198, Unknown=3, NotChecked=230, Total=3660 [2021-12-22 00:10:42,883 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 45 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 42 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 00:10:47,471 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1756 (_ BitVec 32)) (v_ArrVal_1757 (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_1756) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_1757)) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1756 (_ BitVec 32)) (v_ArrVal_1953 (_ BitVec 32))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_1756) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_1953))))) is different from true [2021-12-22 00:10:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:10:48,665 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-12-22 00:10:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 00:10:48,665 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 42 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-12-22 00:10:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:10:48,666 INFO L225 Difference]: With dead ends: 129 [2021-12-22 00:10:48,666 INFO L226 Difference]: Without dead ends: 129 [2021-12-22 00:10:48,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=556, Invalid=7284, Unknown=4, NotChecked=528, Total=8372 [2021-12-22 00:10:48,668 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 211 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:10:48,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 610 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1548 Invalid, 0 Unknown, 253 Unchecked, 2.1s Time] [2021-12-22 00:10:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-22 00:10:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-22 00:10:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 118 states have internal predecessors, (126), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 00:10:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-12-22 00:10:48,672 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 58 [2021-12-22 00:10:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:10:48,673 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-12-22 00:10:48,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 42 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 00:10:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-12-22 00:10:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 00:10:48,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:10:48,674 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:10:48,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-22 00:10:48,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-12-22 00:10:49,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-22 00:10:49,088 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:10:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:10:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1538748096, now seen corresponding path program 1 times [2021-12-22 00:10:49,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:10:49,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813298318] [2021-12-22 00:10:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:49,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:10:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:10:49,091 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:10:49,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-22 00:10:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-22 00:10:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:49,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:10:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:49,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:49,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:50,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-22 00:10:55,744 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2147 (_ BitVec 32)) (v_ArrVal_2145 (_ BitVec 32))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2145) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2147)))) is different from true [2021-12-22 00:10:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 00:10:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:55,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 45 [2021-12-22 00:10:56,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:10:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:10:56,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:10:56,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:10:56,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813298318] [2021-12-22 00:10:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813298318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:10:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [195943641] [2021-12-22 00:10:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:10:56,975 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:10:56,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:10:56,976 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:10:56,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-22 00:10:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:10:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-22 00:10:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:10:57,549 INFO L387 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 14 treesize of output 10 [2021-12-22 00:10:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:57,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:57,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:57,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:58,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-12-22 00:10:58,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-12-22 00:10:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:10:58,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-22 00:11:01,426 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2344 (_ BitVec 32)) (v_ArrVal_2145 (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2145) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2344)) |c_#memory_$Pointer$.base|)) is different from true [2021-12-22 00:11:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:11:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:11:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:11:01,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 00:11:01,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 39 [2021-12-22 00:11:01,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:11:01,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 00:11:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:11:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:11:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [195943641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:11:03,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:11:03,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 46 [2021-12-22 00:11:03,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748210592] [2021-12-22 00:11:03,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:11:03,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 00:11:03,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:11:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 00:11:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3299, Unknown=3, NotChecked=234, Total=3782 [2021-12-22 00:11:03,338 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 43 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 00:11:07,310 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2344 (_ BitVec 32)) (v_ArrVal_2145 (_ BitVec 32))) (= (store |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2145) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2344)) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_2147 (_ BitVec 32)) (v_ArrVal_2145 (_ BitVec 32))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_ArrVal_2145) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_ArrVal_2147))))) is different from true [2021-12-22 00:11:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:11:08,384 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2021-12-22 00:11:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 00:11:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 43 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-12-22 00:11:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:11:08,385 INFO L225 Difference]: With dead ends: 123 [2021-12-22 00:11:08,385 INFO L226 Difference]: Without dead ends: 121 [2021-12-22 00:11:08,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=477, Invalid=5231, Unknown=4, NotChecked=450, Total=6162 [2021-12-22 00:11:08,387 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 193 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:11:08,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 442 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1386 Invalid, 0 Unknown, 232 Unchecked, 2.2s Time] [2021-12-22 00:11:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-22 00:11:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-22 00:11:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 110 states have internal predecessors, (114), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 00:11:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2021-12-22 00:11:08,393 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 59 [2021-12-22 00:11:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:11:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2021-12-22 00:11:08,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 43 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 00:11:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2021-12-22 00:11:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 00:11:08,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:11:08,395 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:11:08,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-12-22 00:11:08,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-22 00:11:08,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:11:08,796 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 18 more)] === [2021-12-22 00:11:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:11:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash 130971687, now seen corresponding path program 1 times [2021-12-22 00:11:08,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:11:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191737511] [2021-12-22 00:11:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:11:08,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:11:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:11:08,798 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:11:08,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-22 00:11:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:11:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 00:11:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:11:09,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5