./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/uthash-2.0.2/uthash_FNV_test6-2.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 e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 23:53:21,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 23:53:21,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 23:53:21,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 23:53:21,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 23:53:21,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 23:53:21,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 23:53:21,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 23:53:21,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 23:53:21,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 23:53:21,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 23:53:21,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 23:53:21,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 23:53:21,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 23:53:21,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 23:53:21,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 23:53:21,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 23:53:21,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 23:53:21,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 23:53:21,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 23:53:21,983 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 23:53:21,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 23:53:21,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 23:53:21,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 23:53:21,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 23:53:21,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 23:53:21,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 23:53:21,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 23:53:21,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 23:53:21,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 23:53:21,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 23:53:21,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 23:53:21,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 23:53:21,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 23:53:21,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 23:53:21,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 23:53:21,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 23:53:21,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 23:53:21,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 23:53:21,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 23:53:21,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 23:53:22,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 23:53:22,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 23:53:22,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 23:53:22,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 23:53:22,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 23:53:22,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 23:53:22,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 23:53:22,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 23:53:22,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 23:53:22,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 23:53:22,035 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 23:53:22,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 23:53:22,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 23:53:22,036 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 23:53:22,037 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 23:53:22,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 23:53:22,037 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 23:53:22,037 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 23:53:22,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 23:53:22,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 23:53:22,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 23:53:22,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 23:53:22,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 [2022-07-21 23:53:22,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 23:53:22,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 23:53:22,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 23:53:22,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 23:53:22,317 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 23:53:22,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-21 23:53:22,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b911cea/e4af73ac59744f578fd6f555c587af1b/FLAG9bf44c9c4 [2022-07-21 23:53:22,761 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 23:53:22,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-21 23:53:22,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b911cea/e4af73ac59744f578fd6f555c587af1b/FLAG9bf44c9c4 [2022-07-21 23:53:23,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b911cea/e4af73ac59744f578fd6f555c587af1b [2022-07-21 23:53:23,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 23:53:23,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 23:53:23,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 23:53:23,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 23:53:23,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 23:53:23,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:23" (1/1) ... [2022-07-21 23:53:23,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da56ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:23, skipping insertion in model container [2022-07-21 23:53:23,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:23" (1/1) ... [2022-07-21 23:53:23,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 23:53:23,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 23:53:23,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-21 23:53:23,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-21 23:53:23,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-21 23:53:23,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-21 23:53:23,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 23:53:23,690 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 23:53:23,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12cb314e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:23, skipping insertion in model container [2022-07-21 23:53:23,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 23:53:23,691 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 23:53:23,693 INFO L158 Benchmark]: Toolchain (without parser) took 573.72ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 38.1MB in the end (delta: 6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 23:53:23,693 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 23:53:23,694 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.32ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 38.1MB in the end (delta: 5.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 23:53:23,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 67.1MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.32ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 38.1MB in the end (delta: 5.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.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 e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 23:53:25,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 23:53:25,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 23:53:25,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 23:53:25,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 23:53:25,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 23:53:25,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 23:53:25,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 23:53:25,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 23:53:25,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 23:53:25,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 23:53:25,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 23:53:25,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 23:53:25,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 23:53:25,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 23:53:25,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 23:53:25,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 23:53:25,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 23:53:25,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 23:53:25,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 23:53:25,283 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 23:53:25,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 23:53:25,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 23:53:25,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 23:53:25,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 23:53:25,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 23:53:25,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 23:53:25,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 23:53:25,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 23:53:25,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 23:53:25,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 23:53:25,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 23:53:25,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 23:53:25,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 23:53:25,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 23:53:25,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 23:53:25,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 23:53:25,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 23:53:25,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 23:53:25,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 23:53:25,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 23:53:25,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 23:53:25,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 23:53:25,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 23:53:25,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 23:53:25,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 23:53:25,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 23:53:25,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 23:53:25,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 23:53:25,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 23:53:25,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 23:53:25,333 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 23:53:25,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 23:53:25,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 23:53:25,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 23:53:25,336 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 23:53:25,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 23:53:25,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 23:53:25,340 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 23:53:25,340 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 23:53:25,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 23:53:25,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 23:53:25,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 23:53:25,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 23:53:25,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 23:53:25,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 23:53:25,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 23:53:25,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 23:53:25,342 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 23:53:25,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 23:53:25,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 23:53:25,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 [2022-07-21 23:53:25,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 23:53:25,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 23:53:25,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 23:53:25,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 23:53:25,630 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 23:53:25,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-21 23:53:25,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0e92912/9824954ef40f47f19fe9082565e1ee09/FLAG98a57c92f [2022-07-21 23:53:26,177 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 23:53:26,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-21 23:53:26,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0e92912/9824954ef40f47f19fe9082565e1ee09/FLAG98a57c92f [2022-07-21 23:53:26,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0e92912/9824954ef40f47f19fe9082565e1ee09 [2022-07-21 23:53:26,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 23:53:26,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 23:53:26,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 23:53:26,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 23:53:26,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 23:53:26,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:26" (1/1) ... [2022-07-21 23:53:26,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0c422d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:26, skipping insertion in model container [2022-07-21 23:53:26,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:26" (1/1) ... [2022-07-21 23:53:26,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 23:53:26,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 23:53:27,234 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-21 23:53:27,249 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-21 23:53:27,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-21 23:53:27,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-21 23:53:27,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 23:53:27,393 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 23:53:27,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 23:53:27,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-21 23:53:27,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-21 23:53:27,469 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-21 23:53:27,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-21 23:53:27,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 23:53:27,484 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 23:53:27,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-21 23:53:27,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-21 23:53:27,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-21 23:53:27,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-21 23:53:27,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 23:53:27,591 INFO L208 MainTranslator]: Completed translation [2022-07-21 23:53:27,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27 WrapperNode [2022-07-21 23:53:27,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 23:53:27,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 23:53:27,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 23:53:27,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 23:53:27,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,703 INFO L137 Inliner]: procedures = 285, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1204 [2022-07-21 23:53:27,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 23:53:27,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 23:53:27,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 23:53:27,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 23:53:27,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 23:53:27,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 23:53:27,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 23:53:27,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 23:53:27,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (1/1) ... [2022-07-21 23:53:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 23:53:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 23:53:27,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 23:53:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 23:53:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 23:53:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 23:53:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-21 23:53:27,861 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-21 23:53:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 23:53:27,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 23:53:27,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 23:53:27,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 23:53:27,862 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-21 23:53:27,862 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-21 23:53:27,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 23:53:27,862 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-21 23:53:27,862 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-21 23:53:27,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 23:53:27,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 23:53:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 23:53:28,028 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 23:53:28,029 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 23:53:31,189 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 23:53:31,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 23:53:31,224 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2022-07-21 23:53:31,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:53:31 BoogieIcfgContainer [2022-07-21 23:53:31,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 23:53:31,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 23:53:31,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 23:53:31,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 23:53:31,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:53:26" (1/3) ... [2022-07-21 23:53:31,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b4b8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:53:31, skipping insertion in model container [2022-07-21 23:53:31,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:27" (2/3) ... [2022-07-21 23:53:31,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b4b8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:53:31, skipping insertion in model container [2022-07-21 23:53:31,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:53:31" (3/3) ... [2022-07-21 23:53:31,247 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test6-2.i [2022-07-21 23:53:31,257 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 23:53:31,258 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 634 error locations. [2022-07-21 23:53:31,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 23:53:31,341 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f04129e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7257cd53 [2022-07-21 23:53:31,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 634 error locations. [2022-07-21 23:53:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 23:53:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 23:53:31,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:31,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 23:53:31,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-21 23:53:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796148501] [2022-07-21 23:53:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:31,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:31,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 23:53:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 23:53:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:31,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:31,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:31,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796148501] [2022-07-21 23:53:31,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796148501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:31,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:31,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 23:53:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711782454] [2022-07-21 23:53:31,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 23:53:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:31,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 23:53:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:31,609 INFO L87 Difference]: Start difference. First operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:33,588 INFO L93 Difference]: Finished difference Result 1537 states and 1627 transitions. [2022-07-21 23:53:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 23:53:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 23:53:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:33,606 INFO L225 Difference]: With dead ends: 1537 [2022-07-21 23:53:33,606 INFO L226 Difference]: Without dead ends: 1535 [2022-07-21 23:53:33,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:33,610 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 906 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:33,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1258 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-21 23:53:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-07-21 23:53:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1300. [2022-07-21 23:53:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 660 states have (on average 2.106060606060606) internal successors, (1390), 1281 states have internal predecessors, (1390), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 23:53:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1420 transitions. [2022-07-21 23:53:33,675 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1420 transitions. Word has length 3 [2022-07-21 23:53:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:33,676 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1420 transitions. [2022-07-21 23:53:33,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1420 transitions. [2022-07-21 23:53:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 23:53:33,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:33,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 23:53:33,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 23:53:33,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:33,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:33,885 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-21 23:53:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:33,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8708871] [2022-07-21 23:53:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:33,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:33,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:33,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:33,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 23:53:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 23:53:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:34,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:34,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:34,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8708871] [2022-07-21 23:53:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8708871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:34,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:34,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 23:53:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625362484] [2022-07-21 23:53:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:34,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 23:53:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 23:53:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:34,037 INFO L87 Difference]: Start difference. First operand 1300 states and 1420 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:36,569 INFO L93 Difference]: Finished difference Result 1891 states and 2058 transitions. [2022-07-21 23:53:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 23:53:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 23:53:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:36,575 INFO L225 Difference]: With dead ends: 1891 [2022-07-21 23:53:36,575 INFO L226 Difference]: Without dead ends: 1891 [2022-07-21 23:53:36,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:36,576 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 624 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:36,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1758 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-21 23:53:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-07-21 23:53:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1504. [2022-07-21 23:53:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 863 states have (on average 2.0880648899188876) internal successors, (1802), 1483 states have internal predecessors, (1802), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 23:53:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1836 transitions. [2022-07-21 23:53:36,611 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1836 transitions. Word has length 3 [2022-07-21 23:53:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:36,611 INFO L495 AbstractCegarLoop]: Abstraction has 1504 states and 1836 transitions. [2022-07-21 23:53:36,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1836 transitions. [2022-07-21 23:53:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 23:53:36,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:36,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:36,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:36,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-21 23:53:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981507363] [2022-07-21 23:53:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:36,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:36,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 23:53:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:36,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 23:53:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:36,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:36,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 23:53:37,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 23:53:37,043 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 23:53:37,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 12 [2022-07-21 23:53:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:37,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:37,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981507363] [2022-07-21 23:53:37,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981507363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:37,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:37,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 23:53:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107043429] [2022-07-21 23:53:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:37,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:37,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:37,067 INFO L87 Difference]: Start difference. First operand 1504 states and 1836 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:40,518 INFO L93 Difference]: Finished difference Result 2569 states and 2979 transitions. [2022-07-21 23:53:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 23:53:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 23:53:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:40,526 INFO L225 Difference]: With dead ends: 2569 [2022-07-21 23:53:40,526 INFO L226 Difference]: Without dead ends: 2569 [2022-07-21 23:53:40,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:40,527 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2002 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:40,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 1477 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-21 23:53:40,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-21 23:53:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1649. [2022-07-21 23:53:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1008 states have (on average 2.068452380952381) internal successors, (2085), 1628 states have internal predecessors, (2085), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 23:53:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2119 transitions. [2022-07-21 23:53:40,587 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2119 transitions. Word has length 8 [2022-07-21 23:53:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:40,587 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2119 transitions. [2022-07-21 23:53:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2119 transitions. [2022-07-21 23:53:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 23:53:40,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:40,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:40,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-21 23:53:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:40,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:40,797 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-21 23:53:40,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:40,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657086405] [2022-07-21 23:53:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:40,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:40,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:40,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 23:53:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 23:53:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:40,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:40,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:40,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657086405] [2022-07-21 23:53:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657086405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:40,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 23:53:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094562255] [2022-07-21 23:53:40,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:40,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:40,937 INFO L87 Difference]: Start difference. First operand 1649 states and 2119 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:43,555 INFO L93 Difference]: Finished difference Result 2811 states and 3512 transitions. [2022-07-21 23:53:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 23:53:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 23:53:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:43,564 INFO L225 Difference]: With dead ends: 2811 [2022-07-21 23:53:43,564 INFO L226 Difference]: Without dead ends: 2811 [2022-07-21 23:53:43,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:43,565 INFO L413 NwaCegarLoop]: 1321 mSDtfsCounter, 2333 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:43,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 2579 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 23:53:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-21 23:53:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1604. [2022-07-21 23:53:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1008 states have (on average 2.009920634920635) internal successors, (2026), 1583 states have internal predecessors, (2026), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 23:53:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2060 transitions. [2022-07-21 23:53:43,608 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2060 transitions. Word has length 9 [2022-07-21 23:53:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:43,608 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2060 transitions. [2022-07-21 23:53:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2060 transitions. [2022-07-21 23:53:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 23:53:43,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:43,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:43,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:43,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-21 23:53:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:43,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019332978] [2022-07-21 23:53:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:43,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:43,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:43,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 23:53:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 23:53:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:43,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:43,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:43,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019332978] [2022-07-21 23:53:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019332978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:43,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:43,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 23:53:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2933627] [2022-07-21 23:53:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:44,000 INFO L87 Difference]: Start difference. First operand 1604 states and 2060 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:47,190 INFO L93 Difference]: Finished difference Result 2440 states and 3105 transitions. [2022-07-21 23:53:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 23:53:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 23:53:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:47,197 INFO L225 Difference]: With dead ends: 2440 [2022-07-21 23:53:47,197 INFO L226 Difference]: Without dead ends: 2440 [2022-07-21 23:53:47,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:47,202 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1581 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:47,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2720 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-21 23:53:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-21 23:53:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1594. [2022-07-21 23:53:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1008 states have (on average 1.9861111111111112) internal successors, (2002), 1573 states have internal predecessors, (2002), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 23:53:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2036 transitions. [2022-07-21 23:53:47,232 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2036 transitions. Word has length 9 [2022-07-21 23:53:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:47,233 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2036 transitions. [2022-07-21 23:53:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2036 transitions. [2022-07-21 23:53:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 23:53:47,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:47,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:47,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:47,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:47,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-21 23:53:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:47,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417572102] [2022-07-21 23:53:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:47,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 23:53:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 23:53:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:47,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:47,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:47,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417572102] [2022-07-21 23:53:47,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417572102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:47,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:47,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461705085] [2022-07-21 23:53:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:47,655 INFO L87 Difference]: Start difference. First operand 1594 states and 2036 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:48,212 INFO L93 Difference]: Finished difference Result 2264 states and 2809 transitions. [2022-07-21 23:53:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 23:53:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 23:53:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:48,223 INFO L225 Difference]: With dead ends: 2264 [2022-07-21 23:53:48,224 INFO L226 Difference]: Without dead ends: 2264 [2022-07-21 23:53:48,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:48,238 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 748 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:48,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 3873 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 23:53:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-07-21 23:53:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1852. [2022-07-21 23:53:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1263 states have (on average 1.990498812351544) internal successors, (2514), 1828 states have internal predecessors, (2514), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 23:53:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2554 transitions. [2022-07-21 23:53:48,269 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2554 transitions. Word has length 11 [2022-07-21 23:53:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:48,269 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2554 transitions. [2022-07-21 23:53:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2554 transitions. [2022-07-21 23:53:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 23:53:48,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:48,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:48,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:48,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2126591358, now seen corresponding path program 1 times [2022-07-21 23:53:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:48,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890851193] [2022-07-21 23:53:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:48,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 23:53:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 23:53:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:48,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 23:53:48,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 23:53:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 23:53:48,713 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-21 23:53:48,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-07-21 23:53:48,745 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-21 23:53:48,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2022-07-21 23:53:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:48,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:48,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890851193] [2022-07-21 23:53:48,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890851193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:48,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:48,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987042337] [2022-07-21 23:53:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:48,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:48,757 INFO L87 Difference]: Start difference. First operand 1852 states and 2554 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:49,926 INFO L93 Difference]: Finished difference Result 2000 states and 2409 transitions. [2022-07-21 23:53:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 23:53:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 23:53:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:49,933 INFO L225 Difference]: With dead ends: 2000 [2022-07-21 23:53:49,933 INFO L226 Difference]: Without dead ends: 2000 [2022-07-21 23:53:49,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:49,935 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 501 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:49,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 3873 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 23:53:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2022-07-21 23:53:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1494. [2022-07-21 23:53:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 907 states have (on average 1.9757442116868797) internal successors, (1792), 1472 states have internal predecessors, (1792), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1828 transitions. [2022-07-21 23:53:49,961 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1828 transitions. Word has length 14 [2022-07-21 23:53:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:49,961 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1828 transitions. [2022-07-21 23:53:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1828 transitions. [2022-07-21 23:53:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 23:53:49,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:49,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:50,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:50,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-21 23:53:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57450625] [2022-07-21 23:53:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:50,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:50,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:50,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 23:53:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 23:53:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:50,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:50,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57450625] [2022-07-21 23:53:50,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57450625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:50,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 23:53:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181776695] [2022-07-21 23:53:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 23:53:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 23:53:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:50,352 INFO L87 Difference]: Start difference. First operand 1494 states and 1828 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:50,369 INFO L93 Difference]: Finished difference Result 1434 states and 1742 transitions. [2022-07-21 23:53:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 23:53:50,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 23:53:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:50,373 INFO L225 Difference]: With dead ends: 1434 [2022-07-21 23:53:50,373 INFO L226 Difference]: Without dead ends: 1434 [2022-07-21 23:53:50,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 23:53:50,374 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1165 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:50,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1308 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 23:53:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-21 23:53:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1434. [2022-07-21 23:53:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 871 states have (on average 1.9586681974741675) internal successors, (1706), 1412 states have internal predecessors, (1706), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1742 transitions. [2022-07-21 23:53:50,389 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1742 transitions. Word has length 19 [2022-07-21 23:53:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1742 transitions. [2022-07-21 23:53:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1742 transitions. [2022-07-21 23:53:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 23:53:50,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:50,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:50,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:50,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:50,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-21 23:53:50,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:50,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938965015] [2022-07-21 23:53:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:50,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:50,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:50,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:50,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 23:53:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:50,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 23:53:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:50,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:50,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938965015] [2022-07-21 23:53:50,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938965015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:50,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:50,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102201341] [2022-07-21 23:53:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:50,800 INFO L87 Difference]: Start difference. First operand 1434 states and 1742 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:50,870 INFO L93 Difference]: Finished difference Result 1406 states and 1686 transitions. [2022-07-21 23:53:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 23:53:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 23:53:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:50,874 INFO L225 Difference]: With dead ends: 1406 [2022-07-21 23:53:50,874 INFO L226 Difference]: Without dead ends: 1406 [2022-07-21 23:53:50,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:50,876 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 1136 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:50,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 2450 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 23:53:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-07-21 23:53:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2022-07-21 23:53:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 855 states have (on average 1.9274853801169591) internal successors, (1648), 1382 states have internal predecessors, (1648), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1684 transitions. [2022-07-21 23:53:50,889 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1684 transitions. Word has length 21 [2022-07-21 23:53:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:50,890 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1684 transitions. [2022-07-21 23:53:50,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1684 transitions. [2022-07-21 23:53:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 23:53:50,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:50,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:50,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:51,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:51,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-21 23:53:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:51,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506321705] [2022-07-21 23:53:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:51,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:51,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 23:53:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 23:53:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:51,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:51,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:51,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506321705] [2022-07-21 23:53:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506321705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:51,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:51,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:51,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698708089] [2022-07-21 23:53:51,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 23:53:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 23:53:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:51,348 INFO L87 Difference]: Start difference. First operand 1404 states and 1684 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:53,933 INFO L93 Difference]: Finished difference Result 2572 states and 3080 transitions. [2022-07-21 23:53:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 23:53:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-21 23:53:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:53,942 INFO L225 Difference]: With dead ends: 2572 [2022-07-21 23:53:53,943 INFO L226 Difference]: Without dead ends: 2572 [2022-07-21 23:53:53,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 23:53:53,943 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 2421 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:53,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 2737 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 23:53:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-07-21 23:53:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1400. [2022-07-21 23:53:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 855 states have (on average 1.9181286549707601) internal successors, (1640), 1378 states have internal predecessors, (1640), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1676 transitions. [2022-07-21 23:53:53,959 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1676 transitions. Word has length 35 [2022-07-21 23:53:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:53,959 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1676 transitions. [2022-07-21 23:53:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1676 transitions. [2022-07-21 23:53:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 23:53:53,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:53,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:53:53,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:54,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:54,169 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-21 23:53:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:54,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201353908] [2022-07-21 23:53:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:54,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:54,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:54,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:54,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 23:53:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 23:53:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:54,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:53:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:54,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:54,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:54,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201353908] [2022-07-21 23:53:54,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201353908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:54,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:54,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465894546] [2022-07-21 23:53:54,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 23:53:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 23:53:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:54,468 INFO L87 Difference]: Start difference. First operand 1400 states and 1676 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:57,592 INFO L93 Difference]: Finished difference Result 2214 states and 2659 transitions. [2022-07-21 23:53:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 23:53:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-21 23:53:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:57,598 INFO L225 Difference]: With dead ends: 2214 [2022-07-21 23:53:57,598 INFO L226 Difference]: Without dead ends: 2214 [2022-07-21 23:53:57,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 23:53:57,599 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 2194 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:57,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2194 Valid, 3317 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-21 23:53:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-07-21 23:53:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1396. [2022-07-21 23:53:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 855 states have (on average 1.9087719298245613) internal successors, (1632), 1374 states have internal predecessors, (1632), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1668 transitions. [2022-07-21 23:53:57,616 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1668 transitions. Word has length 35 [2022-07-21 23:53:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:57,616 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1668 transitions. [2022-07-21 23:53:57,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1668 transitions. [2022-07-21 23:53:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 23:53:57,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:57,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-21 23:53:57,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:57,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2063645645, now seen corresponding path program 1 times [2022-07-21 23:53:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:57,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569677955] [2022-07-21 23:53:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:57,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:57,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:57,842 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:57,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 23:53:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 23:53:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:58,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:58,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569677955] [2022-07-21 23:53:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569677955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:58,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:58,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370372290] [2022-07-21 23:53:58,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 23:53:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 23:53:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 23:53:58,085 INFO L87 Difference]: Start difference. First operand 1396 states and 1668 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:58,121 INFO L93 Difference]: Finished difference Result 1384 states and 1648 transitions. [2022-07-21 23:53:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 23:53:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 23:53:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:58,125 INFO L225 Difference]: With dead ends: 1384 [2022-07-21 23:53:58,125 INFO L226 Difference]: Without dead ends: 1384 [2022-07-21 23:53:58,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:53:58,126 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 1112 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:58,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 2428 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 23:53:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-21 23:53:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-21 23:53:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 843 states have (on average 1.9122182680901543) internal successors, (1612), 1362 states have internal predecessors, (1612), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 23:53:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1648 transitions. [2022-07-21 23:53:58,139 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1648 transitions. Word has length 54 [2022-07-21 23:53:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:58,139 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1648 transitions. [2022-07-21 23:53:58,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1648 transitions. [2022-07-21 23:53:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 23:53:58,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:58,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-21 23:53:58,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:58,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash -202859289, now seen corresponding path program 1 times [2022-07-21 23:53:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269058491] [2022-07-21 23:53:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:58,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:58,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:58,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 23:53:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 23:53:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:58,694 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 23:53:58,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-21 23:53:58,754 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 23:53:58,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2022-07-21 23:53:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:53:59,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:53:59,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:53:59,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269058491] [2022-07-21 23:53:59,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269058491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:53:59,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:53:59,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:53:59,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052728661] [2022-07-21 23:53:59,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:53:59,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 23:53:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:53:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 23:53:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:53:59,264 INFO L87 Difference]: Start difference. First operand 1384 states and 1648 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:53:59,361 INFO L93 Difference]: Finished difference Result 1394 states and 1661 transitions. [2022-07-21 23:53:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 23:53:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 23:53:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:53:59,365 INFO L225 Difference]: With dead ends: 1394 [2022-07-21 23:53:59,365 INFO L226 Difference]: Without dead ends: 1394 [2022-07-21 23:53:59,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:53:59,366 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 61 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:53:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 2495 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 570 Unchecked, 0.1s Time] [2022-07-21 23:53:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-07-21 23:53:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1389. [2022-07-21 23:53:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9090909090909092) internal successors, (1617), 1366 states have internal predecessors, (1617), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 23:53:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1655 transitions. [2022-07-21 23:53:59,378 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1655 transitions. Word has length 62 [2022-07-21 23:53:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:53:59,379 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1655 transitions. [2022-07-21 23:53:59,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:53:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1655 transitions. [2022-07-21 23:53:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 23:53:59,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:53:59,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-21 23:53:59,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 23:53:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:53:59,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:53:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:53:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -202859288, now seen corresponding path program 1 times [2022-07-21 23:53:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:53:59,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442635695] [2022-07-21 23:53:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:53:59,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:53:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:53:59,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:53:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 23:53:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:53:59,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 23:53:59,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:53:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 23:53:59,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 23:53:59,978 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 23:53:59,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 23:54:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:00,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:00,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442635695] [2022-07-21 23:54:00,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442635695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:00,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:00,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 23:54:00,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580610797] [2022-07-21 23:54:00,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:00,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 23:54:00,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 23:54:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:54:00,326 INFO L87 Difference]: Start difference. First operand 1389 states and 1655 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:54:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:03,011 INFO L93 Difference]: Finished difference Result 1390 states and 1655 transitions. [2022-07-21 23:54:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 23:54:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 23:54:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:03,015 INFO L225 Difference]: With dead ends: 1390 [2022-07-21 23:54:03,015 INFO L226 Difference]: Without dead ends: 1390 [2022-07-21 23:54:03,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 23:54:03,016 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 111 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 3016 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:03,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 3016 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-21 23:54:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-07-21 23:54:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1389. [2022-07-21 23:54:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9079102715466352) internal successors, (1616), 1366 states have internal predecessors, (1616), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 23:54:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1654 transitions. [2022-07-21 23:54:03,031 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1654 transitions. Word has length 62 [2022-07-21 23:54:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:03,032 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1654 transitions. [2022-07-21 23:54:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:54:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1654 transitions. [2022-07-21 23:54:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 23:54:03,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:03,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2022-07-21 23:54:03,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 23:54:03,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:03,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1136013504, now seen corresponding path program 1 times [2022-07-21 23:54:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:03,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88198352] [2022-07-21 23:54:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:03,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:03,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:03,246 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) [2022-07-21 23:54:03,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 23:54:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 23:54:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:03,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:03,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88198352] [2022-07-21 23:54:03,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88198352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:03,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:03,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 23:54:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879536515] [2022-07-21 23:54:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 23:54:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 23:54:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:54:03,531 INFO L87 Difference]: Start difference. First operand 1389 states and 1654 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:54:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:03,630 INFO L93 Difference]: Finished difference Result 1403 states and 1668 transitions. [2022-07-21 23:54:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 23:54:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 23:54:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:03,646 INFO L225 Difference]: With dead ends: 1403 [2022-07-21 23:54:03,646 INFO L226 Difference]: Without dead ends: 1403 [2022-07-21 23:54:03,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 23:54:03,647 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 19 mSDsluCounter, 4732 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:03,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5918 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 23:54:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-07-21 23:54:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2022-07-21 23:54:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 856 states have (on average 1.9018691588785046) internal successors, (1628), 1376 states have internal predecessors, (1628), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 23:54:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1668 transitions. [2022-07-21 23:54:03,665 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1668 transitions. Word has length 68 [2022-07-21 23:54:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:03,666 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1668 transitions. [2022-07-21 23:54:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 23:54:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1668 transitions. [2022-07-21 23:54:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 23:54:03,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:03,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2022-07-21 23:54:03,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:03,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:03,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1078181117, now seen corresponding path program 1 times [2022-07-21 23:54:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:03,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065962219] [2022-07-21 23:54:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:03,882 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) [2022-07-21 23:54:03,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 23:54:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 23:54:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:04,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:04,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065962219] [2022-07-21 23:54:04,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065962219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:04,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:04,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 23:54:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094925368] [2022-07-21 23:54:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 23:54:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 23:54:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:54:04,248 INFO L87 Difference]: Start difference. First operand 1401 states and 1668 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 23:54:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:04,360 INFO L93 Difference]: Finished difference Result 1407 states and 1675 transitions. [2022-07-21 23:54:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 23:54:04,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 68 [2022-07-21 23:54:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:04,364 INFO L225 Difference]: With dead ends: 1407 [2022-07-21 23:54:04,364 INFO L226 Difference]: Without dead ends: 1407 [2022-07-21 23:54:04,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 23:54:04,365 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 23 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 4635 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:04,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 4635 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 23:54:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-07-21 23:54:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2022-07-21 23:54:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 858 states have (on average 1.8997668997668997) internal successors, (1630), 1378 states have internal predecessors, (1630), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-21 23:54:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-21 23:54:04,378 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 68 [2022-07-21 23:54:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:04,379 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-21 23:54:04,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 23:54:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-21 23:54:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 23:54:04,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:04,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:04,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:04,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:04,590 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash 396897840, now seen corresponding path program 1 times [2022-07-21 23:54:04,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:04,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553896646] [2022-07-21 23:54:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:04,593 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) [2022-07-21 23:54:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 23:54:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 23:54:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:04,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:05,040 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 23:54:05,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 23:54:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:05,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:05,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553896646] [2022-07-21 23:54:05,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553896646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:05,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:05,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 23:54:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064905941] [2022-07-21 23:54:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 23:54:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 23:54:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:54:05,050 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:08,096 INFO L93 Difference]: Finished difference Result 2560 states and 3059 transitions. [2022-07-21 23:54:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 23:54:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-07-21 23:54:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:08,102 INFO L225 Difference]: With dead ends: 2560 [2022-07-21 23:54:08,102 INFO L226 Difference]: Without dead ends: 2560 [2022-07-21 23:54:08,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 23:54:08,102 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1622 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:08,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 3997 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2727 Invalid, 0 Unknown, 945 Unchecked, 3.0s Time] [2022-07-21 23:54:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-07-21 23:54:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1403. [2022-07-21 23:54:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 858 states have (on average 1.8986013986013985) internal successors, (1629), 1377 states have internal predecessors, (1629), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-21 23:54:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1670 transitions. [2022-07-21 23:54:08,157 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1670 transitions. Word has length 73 [2022-07-21 23:54:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:08,157 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1670 transitions. [2022-07-21 23:54:08,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1670 transitions. [2022-07-21 23:54:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 23:54:08,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:08,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:08,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:08,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:08,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 396897841, now seen corresponding path program 1 times [2022-07-21 23:54:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:08,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207028927] [2022-07-21 23:54:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:08,367 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) [2022-07-21 23:54:08,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 23:54:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 23:54:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:08,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:08,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 23:54:09,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 23:54:09,044 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 23:54:09,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 12 [2022-07-21 23:54:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:09,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:09,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207028927] [2022-07-21 23:54:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207028927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 23:54:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423479176] [2022-07-21 23:54:09,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 23:54:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 23:54:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 23:54:09,061 INFO L87 Difference]: Start difference. First operand 1403 states and 1670 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:14,020 INFO L93 Difference]: Finished difference Result 2630 states and 3192 transitions. [2022-07-21 23:54:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 23:54:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-07-21 23:54:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:14,024 INFO L225 Difference]: With dead ends: 2630 [2022-07-21 23:54:14,024 INFO L226 Difference]: Without dead ends: 2630 [2022-07-21 23:54:14,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 23:54:14,025 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2395 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 5029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:14,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2401 Valid, 3459 Invalid, 5029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3685 Invalid, 0 Unknown, 1309 Unchecked, 4.9s Time] [2022-07-21 23:54:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2022-07-21 23:54:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1397. [2022-07-21 23:54:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 1371 states have internal predecessors, (1623), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-21 23:54:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1664 transitions. [2022-07-21 23:54:14,039 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1664 transitions. Word has length 73 [2022-07-21 23:54:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:14,039 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1664 transitions. [2022-07-21 23:54:14,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1664 transitions. [2022-07-21 23:54:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 23:54:14,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:14,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:14,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-21 23:54:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:14,252 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1622258381, now seen corresponding path program 1 times [2022-07-21 23:54:14,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:14,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402339968] [2022-07-21 23:54:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:14,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:14,255 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) [2022-07-21 23:54:14,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 23:54:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 23:54:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:14,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:14,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:54:14,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 23:54:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:14,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:14,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402339968] [2022-07-21 23:54:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402339968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:14,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:14,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 23:54:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314170047] [2022-07-21 23:54:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 23:54:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 23:54:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 23:54:14,571 INFO L87 Difference]: Start difference. First operand 1397 states and 1664 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 23:54:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:17,477 INFO L93 Difference]: Finished difference Result 1405 states and 1672 transitions. [2022-07-21 23:54:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 23:54:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2022-07-21 23:54:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:17,486 INFO L225 Difference]: With dead ends: 1405 [2022-07-21 23:54:17,487 INFO L226 Difference]: Without dead ends: 1405 [2022-07-21 23:54:17,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 23:54:17,487 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 23 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:17,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4931 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-21 23:54:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-07-21 23:54:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1404. [2022-07-21 23:54:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.8833718244803694) internal successors, (1631), 1377 states have internal predecessors, (1631), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-21 23:54:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1672 transitions. [2022-07-21 23:54:17,512 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1672 transitions. Word has length 80 [2022-07-21 23:54:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:17,512 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1672 transitions. [2022-07-21 23:54:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 23:54:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1672 transitions. [2022-07-21 23:54:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 23:54:17,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:17,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:17,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-21 23:54:17,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:17,725 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1249597809, now seen corresponding path program 1 times [2022-07-21 23:54:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:17,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39218867] [2022-07-21 23:54:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:17,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:17,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:17,727 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) [2022-07-21 23:54:17,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 23:54:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:17,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 23:54:18,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:18,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:18,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:54:18,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:54:18,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 23:54:18,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 23:54:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:18,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:18,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39218867] [2022-07-21 23:54:18,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39218867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:18,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:18,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 23:54:18,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630181700] [2022-07-21 23:54:18,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:18,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 23:54:18,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 23:54:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 23:54:18,134 INFO L87 Difference]: Start difference. First operand 1404 states and 1672 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:22,445 INFO L93 Difference]: Finished difference Result 1404 states and 1671 transitions. [2022-07-21 23:54:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 23:54:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 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 81 [2022-07-21 23:54:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:22,449 INFO L225 Difference]: With dead ends: 1404 [2022-07-21 23:54:22,449 INFO L226 Difference]: Without dead ends: 1404 [2022-07-21 23:54:22,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-21 23:54:22,450 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 19 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:22,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5949 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-21 23:54:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-07-21 23:54:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2022-07-21 23:54:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.882217090069284) internal successors, (1630), 1377 states have internal predecessors, (1630), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-21 23:54:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-21 23:54:22,464 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 81 [2022-07-21 23:54:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:22,465 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-21 23:54:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 23:54:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-21 23:54:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 23:54:22,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:22,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:22,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:22,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:22,676 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash -63374884, now seen corresponding path program 1 times [2022-07-21 23:54:22,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:22,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652248002] [2022-07-21 23:54:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:22,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:22,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:22,679 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) [2022-07-21 23:54:22,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 23:54:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 23:54:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:23,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 23:54:23,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:23,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652248002] [2022-07-21 23:54:23,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652248002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 23:54:23,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 23:54:23,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 23:54:23,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209015876] [2022-07-21 23:54:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 23:54:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 23:54:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 23:54:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 23:54:23,030 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 23:54:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:23,078 INFO L93 Difference]: Finished difference Result 1412 states and 1680 transitions. [2022-07-21 23:54:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 23:54:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2022-07-21 23:54:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:23,081 INFO L225 Difference]: With dead ends: 1412 [2022-07-21 23:54:23,082 INFO L226 Difference]: Without dead ends: 1409 [2022-07-21 23:54:23,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 23:54:23,082 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 13 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:23,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3514 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 23:54:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-21 23:54:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2022-07-21 23:54:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 870 states have (on average 1.8793103448275863) internal successors, (1635), 1382 states have internal predecessors, (1635), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:54:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1677 transitions. [2022-07-21 23:54:23,098 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1677 transitions. Word has length 88 [2022-07-21 23:54:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:23,099 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1677 transitions. [2022-07-21 23:54:23,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 23:54:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1677 transitions. [2022-07-21 23:54:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 23:54:23,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:23,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 23:54:23,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:23,310 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -407790698, now seen corresponding path program 1 times [2022-07-21 23:54:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:23,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838336718] [2022-07-21 23:54:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:54:23,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:23,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:23,313 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) [2022-07-21 23:54:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 23:54:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:54:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 23:54:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:23,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:54:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:23,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:23,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838336718] [2022-07-21 23:54:23,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838336718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 23:54:23,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 23:54:23,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 23:54:23,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080427476] [2022-07-21 23:54:23,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 23:54:23,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 23:54:23,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:23,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 23:54:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 23:54:23,765 INFO L87 Difference]: Start difference. First operand 1409 states and 1677 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:23,954 INFO L93 Difference]: Finished difference Result 1422 states and 1692 transitions. [2022-07-21 23:54:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 23:54:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 89 [2022-07-21 23:54:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:23,957 INFO L225 Difference]: With dead ends: 1422 [2022-07-21 23:54:23,957 INFO L226 Difference]: Without dead ends: 1416 [2022-07-21 23:54:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-07-21 23:54:23,958 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 45 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 5863 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 23:54:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-07-21 23:54:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1413. [2022-07-21 23:54:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 874 states have (on average 1.8764302059496567) internal successors, (1640), 1386 states have internal predecessors, (1640), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:54:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1682 transitions. [2022-07-21 23:54:23,968 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1682 transitions. Word has length 89 [2022-07-21 23:54:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1682 transitions. [2022-07-21 23:54:23,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1682 transitions. [2022-07-21 23:54:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 23:54:23,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:23,969 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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, 1, 1] [2022-07-21 23:54:23,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:24,180 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1714460764, now seen corresponding path program 2 times [2022-07-21 23:54:24,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:24,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382943080] [2022-07-21 23:54:24,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 23:54:24,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:24,183 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) [2022-07-21 23:54:24,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 23:54:24,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 23:54:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 23:54:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 23:54:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:24,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:54:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:25,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382943080] [2022-07-21 23:54:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382943080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 23:54:25,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 23:54:25,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-21 23:54:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570973500] [2022-07-21 23:54:25,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 23:54:25,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 23:54:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 23:54:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-21 23:54:25,058 INFO L87 Difference]: Start difference. First operand 1413 states and 1682 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:25,656 INFO L93 Difference]: Finished difference Result 1440 states and 1716 transitions. [2022-07-21 23:54:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 23:54:25,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2022-07-21 23:54:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:25,659 INFO L225 Difference]: With dead ends: 1440 [2022-07-21 23:54:25,659 INFO L226 Difference]: Without dead ends: 1434 [2022-07-21 23:54:25,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2022-07-21 23:54:25,660 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 95 mSDsluCounter, 10571 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 11754 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:25,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 11754 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 23:54:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-21 23:54:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1422. [2022-07-21 23:54:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 883 states have (on average 1.870894677236693) internal successors, (1652), 1395 states have internal predecessors, (1652), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:54:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1694 transitions. [2022-07-21 23:54:25,671 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1694 transitions. Word has length 92 [2022-07-21 23:54:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:25,671 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1694 transitions. [2022-07-21 23:54:25,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1694 transitions. [2022-07-21 23:54:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 23:54:25,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:25,672 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 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, 1, 1] [2022-07-21 23:54:25,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:25,884 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1774326244, now seen corresponding path program 3 times [2022-07-21 23:54:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780103181] [2022-07-21 23:54:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 23:54:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:25,887 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) [2022-07-21 23:54:25,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 23:54:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 23:54:26,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 23:54:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 23:54:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:26,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:54:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:27,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780103181] [2022-07-21 23:54:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780103181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 23:54:27,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 23:54:27,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-21 23:54:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989405034] [2022-07-21 23:54:27,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 23:54:27,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 23:54:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 23:54:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-21 23:54:27,556 INFO L87 Difference]: Start difference. First operand 1422 states and 1694 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:30,254 INFO L93 Difference]: Finished difference Result 1476 states and 1768 transitions. [2022-07-21 23:54:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 23:54:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 98 [2022-07-21 23:54:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:30,257 INFO L225 Difference]: With dead ends: 1476 [2022-07-21 23:54:30,257 INFO L226 Difference]: Without dead ends: 1467 [2022-07-21 23:54:30,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 23:54:30,258 INFO L413 NwaCegarLoop]: 1195 mSDtfsCounter, 241 mSDsluCounter, 15439 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 16634 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 16634 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 23:54:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-07-21 23:54:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1440. [2022-07-21 23:54:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 901 states have (on average 1.8590455049944505) internal successors, (1675), 1413 states have internal predecessors, (1675), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:54:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1717 transitions. [2022-07-21 23:54:30,275 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1717 transitions. Word has length 98 [2022-07-21 23:54:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:30,275 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1717 transitions. [2022-07-21 23:54:30,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1717 transitions. [2022-07-21 23:54:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-21 23:54:30,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:30,276 INFO L195 NwaCegarLoop]: trace histogram [22, 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, 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, 1, 1] [2022-07-21 23:54:30,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:30,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:30,489 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash -824268388, now seen corresponding path program 4 times [2022-07-21 23:54:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:30,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691649363] [2022-07-21 23:54:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 23:54:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:30,492 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 23:54:30,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 23:54:30,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 23:54:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 23:54:30,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 23:54:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:31,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:54:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 23:54:32,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691649363] [2022-07-21 23:54:32,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691649363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 23:54:32,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 23:54:32,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-21 23:54:32,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352251414] [2022-07-21 23:54:32,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 23:54:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 23:54:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:54:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 23:54:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 23:54:32,923 INFO L87 Difference]: Start difference. First operand 1440 states and 1717 transitions. Second operand has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:54:40,756 INFO L93 Difference]: Finished difference Result 1543 states and 1852 transitions. [2022-07-21 23:54:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-21 23:54:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 110 [2022-07-21 23:54:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:54:40,759 INFO L225 Difference]: With dead ends: 1543 [2022-07-21 23:54:40,759 INFO L226 Difference]: Without dead ends: 1537 [2022-07-21 23:54:40,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4121, Invalid=9921, Unknown=0, NotChecked=0, Total=14042 [2022-07-21 23:54:40,762 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 540 mSDsluCounter, 29073 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 30290 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 23:54:40,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 30290 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-21 23:54:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-07-21 23:54:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1474. [2022-07-21 23:54:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 935 states have (on average 1.8406417112299465) internal successors, (1721), 1447 states have internal predecessors, (1721), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:54:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1763 transitions. [2022-07-21 23:54:40,777 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1763 transitions. Word has length 110 [2022-07-21 23:54:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:54:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1763 transitions. [2022-07-21 23:54:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 23:54:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1763 transitions. [2022-07-21 23:54:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-21 23:54:40,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:54:40,779 INFO L195 NwaCegarLoop]: trace histogram [44, 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, 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, 1, 1] [2022-07-21 23:54:40,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 23:54:41,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 23:54:41,007 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:54:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:54:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349148, now seen corresponding path program 5 times [2022-07-21 23:54:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:54:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219756508] [2022-07-21 23:54:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 23:54:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:54:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:54:41,010 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) [2022-07-21 23:54:41,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 23:54:42,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-21 23:54:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 23:54:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 23:54:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:54:42,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:54:42,580 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 23:54:42,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-21 23:54:42,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:54:42,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 23:54:44,156 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 23:54:44,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-21 23:54:44,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-21 23:54:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-21 23:54:44,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:54:44,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:54:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219756508] [2022-07-21 23:54:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219756508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 23:54:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882327998] [2022-07-21 23:54:44,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 23:54:44,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 23:54:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 23:54:44,503 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) [2022-07-21 23:54:44,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-21 23:56:12,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-21 23:56:12,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 23:56:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 23:56:13,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:56:13,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:56:13,197 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 23:56:13,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-21 23:56:13,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:56:13,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 23:56:14,566 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 23:56:14,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-21 23:56:14,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-21 23:56:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-21 23:56:14,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:56:14,806 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3142 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3142) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-21 23:56:14,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882327998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 23:56:14,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 23:56:14,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-21 23:56:14,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941895822] [2022-07-21 23:56:14,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 23:56:14,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 23:56:14,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 23:56:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 23:56:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=215, Unknown=18, NotChecked=30, Total=306 [2022-07-21 23:56:14,810 INFO L87 Difference]: Start difference. First operand 1474 states and 1763 transitions. Second operand has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 23:56:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 23:56:20,797 INFO L93 Difference]: Finished difference Result 2790 states and 3320 transitions. [2022-07-21 23:56:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 23:56:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 132 [2022-07-21 23:56:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 23:56:20,802 INFO L225 Difference]: With dead ends: 2790 [2022-07-21 23:56:20,802 INFO L226 Difference]: Without dead ends: 2790 [2022-07-21 23:56:20,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 165 SyntacticMatches, 90 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=480, Unknown=27, NotChecked=46, Total=650 [2022-07-21 23:56:20,803 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 1973 mSDsluCounter, 7662 mSDsCounter, 0 mSdLazyCounter, 5662 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 8568 SdHoareTripleChecker+Invalid, 9799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4102 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-21 23:56:20,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1978 Valid, 8568 Invalid, 9799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5662 Invalid, 0 Unknown, 4102 Unchecked, 5.7s Time] [2022-07-21 23:56:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2022-07-21 23:56:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1471. [2022-07-21 23:56:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 935 states have (on average 1.8374331550802139) internal successors, (1718), 1444 states have internal predecessors, (1718), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 23:56:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1760 transitions. [2022-07-21 23:56:20,831 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1760 transitions. Word has length 132 [2022-07-21 23:56:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 23:56:20,831 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1760 transitions. [2022-07-21 23:56:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 23:56:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1760 transitions. [2022-07-21 23:56:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-21 23:56:20,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 23:56:20,832 INFO L195 NwaCegarLoop]: trace histogram [44, 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, 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, 1, 1] [2022-07-21 23:56:20,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-21 23:56:21,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 23:56:21,263 WARN L477 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 [2022-07-21 23:56:21,263 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-21 23:56:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 23:56:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349149, now seen corresponding path program 1 times [2022-07-21 23:56:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 23:56:21,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900968664] [2022-07-21 23:56:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:56:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 23:56:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 23:56:21,266 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) [2022-07-21 23:56:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 23:56:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 23:56:22,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-21 23:56:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 23:56:22,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:56:22,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 23:56:22,450 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 23:56:22,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 12 [2022-07-21 23:56:22,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:56:22,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 23:56:22,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 23:56:22,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-07-21 23:56:23,945 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3621))) (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3620) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_31 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_31)))) is different from true [2022-07-21 23:56:23,978 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 23:56:23,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-21 23:56:23,982 INFO L390 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 24 [2022-07-21 23:56:24,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 23:56:24,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-07-21 23:56:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-21 23:56:24,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 23:56:24,852 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3713 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_3712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2022-07-21 23:56:24,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 23:56:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900968664] [2022-07-21 23:56:24,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900968664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 23:56:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310758400] [2022-07-21 23:56:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 23:56:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 23:56:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 23:56:24,859 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 23:56:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process