./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.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_SAX_test6-1.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 ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:14:54,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:14:54,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:14:54,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:14:54,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:14:54,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:14:54,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:14:54,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:14:54,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:14:54,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:14:54,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:14:54,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:14:54,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:14:54,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:14:54,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:14:54,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:14:54,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:14:54,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:14:54,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:14:55,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:14:55,010 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:14:55,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:14:55,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:14:55,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:14:55,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:14:55,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:14:55,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:14:55,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:14:55,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:14:55,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:14:55,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:14:55,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:14:55,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:14:55,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:14:55,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:14:55,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:14:55,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:14:55,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:14:55,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:14:55,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:14:55,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:14:55,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:14:55,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-22 00:14:55,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:14:55,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:14:55,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:14:55,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:14:55,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:14:55,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:14:55,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:14:55,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:14:55,086 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:14:55,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:14:55,087 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:14:55,088 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:14:55,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:14:55,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:14:55,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:14:55,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:14:55,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:14:55,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:14:55,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:14:55,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:14:55,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 [2022-07-22 00:14:55,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:14:55,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:14:55,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:14:55,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:14:55,646 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:14:55,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-07-22 00:14:55,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da141f851/efbfd16542134d99b6a15a261eea468c/FLAG212211f42 [2022-07-22 00:14:56,586 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:14:56,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-07-22 00:14:56,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da141f851/efbfd16542134d99b6a15a261eea468c/FLAG212211f42 [2022-07-22 00:14:56,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da141f851/efbfd16542134d99b6a15a261eea468c [2022-07-22 00:14:56,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:14:56,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:14:56,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:14:56,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:14:56,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:14:56,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:14:56" (1/1) ... [2022-07-22 00:14:56,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d086db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:14:56, skipping insertion in model container [2022-07-22 00:14:56,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:14:56" (1/1) ... [2022-07-22 00:14:56,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:14:56,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:14:57,433 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_SAX_test6-1.i[44118,44131] [2022-07-22 00:14:57,457 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_SAX_test6-1.i[44660,44673] [2022-07-22 00:14:57,617 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_SAX_test6-1.i[56247,56260] [2022-07-22 00:14:57,647 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_SAX_test6-1.i[56368,56381] [2022-07-22 00:14:57,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:14:57,674 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) [2022-07-22 00:14:57,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57faea52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:14:57, skipping insertion in model container [2022-07-22 00:14:57,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:14:57,678 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-22 00:14:57,684 INFO L158 Benchmark]: Toolchain (without parser) took 1034.26ms. Allocated memory is still 56.6MB. Free memory was 37.9MB in the beginning and 28.9MB in the end (delta: 8.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 00:14:57,686 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 46.1MB. Free memory was 28.0MB in the beginning and 27.9MB in the end (delta: 53.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:14:57,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1029.41ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 29.1MB in the end (delta: 8.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 00:14:57,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 46.1MB. Free memory was 28.0MB in the beginning and 27.9MB in the end (delta: 53.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1029.41ms. Allocated memory is still 56.6MB. Free memory was 37.7MB in the beginning and 29.1MB in the end (delta: 8.6MB). Peak memory consumption was 14.7MB. 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_SAX_test6-1.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 ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:15:00,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:15:00,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:15:00,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:15:00,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:15:00,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:15:00,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:15:00,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:15:00,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:15:00,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:15:00,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:15:00,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:15:00,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:15:00,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:15:00,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:15:00,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:15:00,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:15:00,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:15:00,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:15:00,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:15:00,510 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:15:00,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:15:00,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:15:00,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:15:00,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:15:00,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:15:00,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:15:00,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:15:00,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:15:00,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:15:00,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:15:00,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:15:00,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:15:00,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:15:00,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:15:00,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:15:00,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:15:00,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:15:00,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:15:00,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:15:00,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:15:00,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:15:00,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-22 00:15:00,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:15:00,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:15:00,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:15:00,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:15:00,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:15:00,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:15:00,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:15:00,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:15:00,604 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:15:00,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:15:00,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-22 00:15:00,606 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:15:00,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:15:00,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:15:00,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:15:00,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:15:00,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:15:00,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:15:00,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:15:00,609 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 00:15:00,609 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 00:15:00,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 00:15:00,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 [2022-07-22 00:15:01,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:15:01,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:15:01,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:15:01,158 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:15:01,158 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:15:01,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-07-22 00:15:01,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a42fc254/38c75afb1ea24119a189590972575590/FLAGffbafcdad [2022-07-22 00:15:02,116 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:15:02,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-07-22 00:15:02,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a42fc254/38c75afb1ea24119a189590972575590/FLAGffbafcdad [2022-07-22 00:15:02,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a42fc254/38c75afb1ea24119a189590972575590 [2022-07-22 00:15:02,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:15:02,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:15:02,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:15:02,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:15:02,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:15:02,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:15:02" (1/1) ... [2022-07-22 00:15:02,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5fa4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:02, skipping insertion in model container [2022-07-22 00:15:02,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:15:02" (1/1) ... [2022-07-22 00:15:02,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:15:02,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:15:03,127 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_SAX_test6-1.i[44118,44131] [2022-07-22 00:15:03,145 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_SAX_test6-1.i[44660,44673] [2022-07-22 00:15:03,330 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_SAX_test6-1.i[56247,56260] [2022-07-22 00:15:03,332 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_SAX_test6-1.i[56368,56381] [2022-07-22 00:15:03,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:15:03,370 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-22 00:15:03,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:15:03,417 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_SAX_test6-1.i[44118,44131] [2022-07-22 00:15:03,420 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_SAX_test6-1.i[44660,44673] [2022-07-22 00:15:03,504 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_SAX_test6-1.i[56247,56260] [2022-07-22 00:15:03,505 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_SAX_test6-1.i[56368,56381] [2022-07-22 00:15:03,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:15:03,537 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:15:03,581 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_SAX_test6-1.i[44118,44131] [2022-07-22 00:15:03,583 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_SAX_test6-1.i[44660,44673] [2022-07-22 00:15:03,677 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_SAX_test6-1.i[56247,56260] [2022-07-22 00:15:03,678 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_SAX_test6-1.i[56368,56381] [2022-07-22 00:15:03,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:15:03,778 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:15:03,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03 WrapperNode [2022-07-22 00:15:03,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:15:03,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:15:03,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:15:03,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:15:03,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:03,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:03,988 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1042 [2022-07-22 00:15:03,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:15:03,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:15:03,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:15:03,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:15:03,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:03,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:15:04,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:15:04,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:15:04,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:15:04,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (1/1) ... [2022-07-22 00:15:04,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:15:04,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:15:04,208 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) [2022-07-22 00:15:04,231 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 [2022-07-22 00:15:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-22 00:15:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-22 00:15:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 00:15:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-22 00:15:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-22 00:15:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 00:15:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 00:15:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 00:15:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 00:15:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-22 00:15:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-22 00:15:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 00:15:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-22 00:15:04,303 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-22 00:15:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:15:04,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:15:04,654 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:15:04,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:15:09,736 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:15:09,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:15:09,760 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2022-07-22 00:15:09,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:15:09 BoogieIcfgContainer [2022-07-22 00:15:09,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:15:09,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:15:09,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:15:09,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:15:09,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:15:02" (1/3) ... [2022-07-22 00:15:09,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469109ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:15:09, skipping insertion in model container [2022-07-22 00:15:09,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:15:03" (2/3) ... [2022-07-22 00:15:09,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469109ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:15:09, skipping insertion in model container [2022-07-22 00:15:09,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:15:09" (3/3) ... [2022-07-22 00:15:09,789 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-1.i [2022-07-22 00:15:09,817 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:15:09,818 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 531 error locations. [2022-07-22 00:15:09,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:15:09,920 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@21ba7287, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@eb6b5ea [2022-07-22 00:15:09,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 531 error locations. [2022-07-22 00:15:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 00:15:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-22 00:15:09,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:09,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-22 00:15:09,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-22 00:15:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:09,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858478188] [2022-07-22 00:15:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:09,980 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) [2022-07-22 00:15:10,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 00:15:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:15:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:10,358 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 [2022-07-22 00:15:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:10,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:10,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858478188] [2022-07-22 00:15:10,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858478188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:10,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:10,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:15:10,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137413354] [2022-07-22 00:15:10,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:10,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:15:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:15:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:15:10,457 INFO L87 Difference]: Start difference. First operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2022-07-22 00:15:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:11,887 INFO L93 Difference]: Finished difference Result 1162 states and 1229 transitions. [2022-07-22 00:15:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:15:11,890 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 [2022-07-22 00:15:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:11,914 INFO L225 Difference]: With dead ends: 1162 [2022-07-22 00:15:11,915 INFO L226 Difference]: Without dead ends: 1160 [2022-07-22 00:15:11,916 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 [2022-07-22 00:15:11,922 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 714 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:11,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1044 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 00:15:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-07-22 00:15:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1103. [2022-07-22 00:15:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 568 states have (on average 2.084507042253521) internal successors, (1184), 1086 states have internal predecessors, (1184), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1210 transitions. [2022-07-22 00:15:12,016 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1210 transitions. Word has length 3 [2022-07-22 00:15:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:12,017 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1210 transitions. [2022-07-22 00:15:12,017 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) [2022-07-22 00:15:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1210 transitions. [2022-07-22 00:15:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-22 00:15:12,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:12,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-22 00:15:12,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:12,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-22 00:15:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:12,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956013375] [2022-07-22 00:15:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:12,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:12,230 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) [2022-07-22 00:15:12,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 00:15:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:15:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:12,355 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 [2022-07-22 00:15:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:12,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:12,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956013375] [2022-07-22 00:15:12,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956013375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:12,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:12,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:15:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595316164] [2022-07-22 00:15:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:12,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:15:12,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:15:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:15:12,372 INFO L87 Difference]: Start difference. First operand 1103 states and 1210 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) [2022-07-22 00:15:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:14,352 INFO L93 Difference]: Finished difference Result 1497 states and 1638 transitions. [2022-07-22 00:15:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:15:14,352 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 [2022-07-22 00:15:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:14,357 INFO L225 Difference]: With dead ends: 1497 [2022-07-22 00:15:14,357 INFO L226 Difference]: Without dead ends: 1497 [2022-07-22 00:15:14,358 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 [2022-07-22 00:15:14,358 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 418 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:14,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1538 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 00:15:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-07-22 00:15:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1307. [2022-07-22 00:15:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 771 states have (on average 2.0700389105058368) internal successors, (1596), 1288 states have internal predecessors, (1596), 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) [2022-07-22 00:15:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1626 transitions. [2022-07-22 00:15:14,398 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1626 transitions. Word has length 3 [2022-07-22 00:15:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:14,399 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 1626 transitions. [2022-07-22 00:15:14,399 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) [2022-07-22 00:15:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1626 transitions. [2022-07-22 00:15:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:15:14,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:14,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:14,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-22 00:15:14,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:14,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-22 00:15:14,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803984642] [2022-07-22 00:15:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:14,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:14,613 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) [2022-07-22 00:15:14,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 00:15:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:15:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:14,776 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 [2022-07-22 00:15:14,790 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 [2022-07-22 00:15:14,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 00:15:14,846 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 [2022-07-22 00:15:14,855 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 00:15:14,855 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 [2022-07-22 00:15:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:14,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:14,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:14,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803984642] [2022-07-22 00:15:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803984642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:14,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:14,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:15:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115107455] [2022-07-22 00:15:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:14,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:14,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:14,877 INFO L87 Difference]: Start difference. First operand 1307 states and 1626 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) [2022-07-22 00:15:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:18,033 INFO L93 Difference]: Finished difference Result 1997 states and 2371 transitions. [2022-07-22 00:15:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:18,034 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 [2022-07-22 00:15:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:18,040 INFO L225 Difference]: With dead ends: 1997 [2022-07-22 00:15:18,040 INFO L226 Difference]: Without dead ends: 1997 [2022-07-22 00:15:18,040 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 [2022-07-22 00:15:18,044 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 719 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:18,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1587 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 00:15:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-07-22 00:15:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1452. [2022-07-22 00:15:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 916 states have (on average 2.0513100436681224) internal successors, (1879), 1433 states have internal predecessors, (1879), 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) [2022-07-22 00:15:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 1909 transitions. [2022-07-22 00:15:18,071 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 1909 transitions. Word has length 8 [2022-07-22 00:15:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:18,072 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 1909 transitions. [2022-07-22 00:15:18,072 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) [2022-07-22 00:15:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 1909 transitions. [2022-07-22 00:15:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:15:18,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:18,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:18,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:18,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-22 00:15:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345524038] [2022-07-22 00:15:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:18,297 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) [2022-07-22 00:15:18,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 00:15:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:15:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:18,418 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 [2022-07-22 00:15:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:18,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:18,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:18,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345524038] [2022-07-22 00:15:18,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345524038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:18,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:18,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:15:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316175627] [2022-07-22 00:15:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:18,443 INFO L87 Difference]: Start difference. First operand 1452 states and 1909 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) [2022-07-22 00:15:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:20,517 INFO L93 Difference]: Finished difference Result 2430 states and 3107 transitions. [2022-07-22 00:15:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:15:20,519 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 [2022-07-22 00:15:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:20,526 INFO L225 Difference]: With dead ends: 2430 [2022-07-22 00:15:20,526 INFO L226 Difference]: Without dead ends: 2430 [2022-07-22 00:15:20,526 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 [2022-07-22 00:15:20,529 INFO L413 NwaCegarLoop]: 1014 mSDtfsCounter, 2141 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:20,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2147 Valid, 1973 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 00:15:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2022-07-22 00:15:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1407. [2022-07-22 00:15:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 916 states have (on average 1.9868995633187774) internal successors, (1820), 1388 states have internal predecessors, (1820), 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) [2022-07-22 00:15:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1850 transitions. [2022-07-22 00:15:20,566 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1850 transitions. Word has length 9 [2022-07-22 00:15:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:20,566 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 1850 transitions. [2022-07-22 00:15:20,566 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) [2022-07-22 00:15:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1850 transitions. [2022-07-22 00:15:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:15:20,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:20,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:20,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:20,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:20,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-22 00:15:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:20,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270929325] [2022-07-22 00:15:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:20,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:20,777 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) [2022-07-22 00:15:20,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 00:15:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:20,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:15:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:20,902 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 [2022-07-22 00:15:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:20,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:20,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270929325] [2022-07-22 00:15:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270929325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:20,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:20,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:15:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724667195] [2022-07-22 00:15:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:20,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:20,940 INFO L87 Difference]: Start difference. First operand 1407 states and 1850 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) [2022-07-22 00:15:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:23,723 INFO L93 Difference]: Finished difference Result 2046 states and 2685 transitions. [2022-07-22 00:15:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:23,724 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 [2022-07-22 00:15:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:23,730 INFO L225 Difference]: With dead ends: 2046 [2022-07-22 00:15:23,730 INFO L226 Difference]: Without dead ends: 2046 [2022-07-22 00:15:23,730 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 [2022-07-22 00:15:23,731 INFO L413 NwaCegarLoop]: 1193 mSDtfsCounter, 1375 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:23,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2096 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 00:15:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-07-22 00:15:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1397. [2022-07-22 00:15:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 916 states have (on average 1.960698689956332) internal successors, (1796), 1378 states have internal predecessors, (1796), 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) [2022-07-22 00:15:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1826 transitions. [2022-07-22 00:15:23,768 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1826 transitions. Word has length 9 [2022-07-22 00:15:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:23,769 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1826 transitions. [2022-07-22 00:15:23,769 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) [2022-07-22 00:15:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1826 transitions. [2022-07-22 00:15:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 00:15:23,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:23,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:23,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:23,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:23,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-22 00:15:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635389535] [2022-07-22 00:15:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:23,981 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) [2022-07-22 00:15:23,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 00:15:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 00:15:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:24,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:24,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635389535] [2022-07-22 00:15:24,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635389535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:24,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405737919] [2022-07-22 00:15:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:24,143 INFO L87 Difference]: Start difference. First operand 1397 states and 1826 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) [2022-07-22 00:15:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:24,737 INFO L93 Difference]: Finished difference Result 1873 states and 2393 transitions. [2022-07-22 00:15:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:15:24,738 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 [2022-07-22 00:15:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:24,743 INFO L225 Difference]: With dead ends: 1873 [2022-07-22 00:15:24,743 INFO L226 Difference]: Without dead ends: 1873 [2022-07-22 00:15:24,744 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 [2022-07-22 00:15:24,744 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 546 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:24,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 3122 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 00:15:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-22 00:15:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1648. [2022-07-22 00:15:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1167 states have (on average 1.974293059125964) internal successors, (2304), 1629 states have internal predecessors, (2304), 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) [2022-07-22 00:15:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2334 transitions. [2022-07-22 00:15:24,773 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2334 transitions. Word has length 11 [2022-07-22 00:15:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:24,773 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2334 transitions. [2022-07-22 00:15:24,773 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) [2022-07-22 00:15:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2334 transitions. [2022-07-22 00:15:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 00:15:24,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:24,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:24,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:24,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:24,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2117571646, now seen corresponding path program 1 times [2022-07-22 00:15:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:24,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312692154] [2022-07-22 00:15:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:24,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:24,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:25,004 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) [2022-07-22 00:15:25,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 00:15:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:25,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:15:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:25,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 00:15:25,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 00:15:25,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 00:15:25,208 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-22 00:15:25,209 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 [2022-07-22 00:15:25,247 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-22 00:15:25,248 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 [2022-07-22 00:15:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:25,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:25,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:25,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312692154] [2022-07-22 00:15:25,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312692154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:25,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:25,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:25,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341222911] [2022-07-22 00:15:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:25,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:25,281 INFO L87 Difference]: Start difference. First operand 1648 states and 2334 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) [2022-07-22 00:15:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:26,417 INFO L93 Difference]: Finished difference Result 1654 states and 2037 transitions. [2022-07-22 00:15:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:26,419 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 [2022-07-22 00:15:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:26,423 INFO L225 Difference]: With dead ends: 1654 [2022-07-22 00:15:26,423 INFO L226 Difference]: Without dead ends: 1654 [2022-07-22 00:15:26,423 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 [2022-07-22 00:15:26,424 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 357 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:26,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 2977 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 00:15:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-07-22 00:15:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1290. [2022-07-22 00:15:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 811 states have (on average 1.9506781750924784) internal successors, (1582), 1273 states have internal predecessors, (1582), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1608 transitions. [2022-07-22 00:15:26,446 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1608 transitions. Word has length 14 [2022-07-22 00:15:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:26,446 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1608 transitions. [2022-07-22 00:15:26,446 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) [2022-07-22 00:15:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1608 transitions. [2022-07-22 00:15:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 00:15:26,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:26,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:15:26,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-22 00:15:26,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:26,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-22 00:15:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:26,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330623242] [2022-07-22 00:15:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:26,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:26,659 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) [2022-07-22 00:15:26,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 00:15:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:26,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 00:15:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:26,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:26,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:26,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330623242] [2022-07-22 00:15:26,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330623242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:26,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:26,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:15:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173955032] [2022-07-22 00:15:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:15:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:15:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:15:26,815 INFO L87 Difference]: Start difference. First operand 1290 states and 1608 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) [2022-07-22 00:15:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:26,845 INFO L93 Difference]: Finished difference Result 1230 states and 1522 transitions. [2022-07-22 00:15:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:15:26,846 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 [2022-07-22 00:15:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:26,849 INFO L225 Difference]: With dead ends: 1230 [2022-07-22 00:15:26,849 INFO L226 Difference]: Without dead ends: 1230 [2022-07-22 00:15:26,849 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 [2022-07-22 00:15:26,850 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 959 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1096 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 [2022-07-22 00:15:26,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1096 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:15:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-07-22 00:15:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2022-07-22 00:15:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 775 states have (on average 1.9303225806451614) internal successors, (1496), 1213 states have internal predecessors, (1496), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1522 transitions. [2022-07-22 00:15:26,869 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1522 transitions. Word has length 19 [2022-07-22 00:15:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:26,870 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1522 transitions. [2022-07-22 00:15:26,870 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) [2022-07-22 00:15:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1522 transitions. [2022-07-22 00:15:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 00:15:26,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:26,871 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] [2022-07-22 00:15:26,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:27,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:27,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-22 00:15:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:27,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322169602] [2022-07-22 00:15:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:27,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:27,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:27,081 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) [2022-07-22 00:15:27,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 00:15:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:27,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:15:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:27,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:27,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322169602] [2022-07-22 00:15:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322169602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:27,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293323972] [2022-07-22 00:15:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:27,245 INFO L87 Difference]: Start difference. First operand 1230 states and 1522 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) [2022-07-22 00:15:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:27,297 INFO L93 Difference]: Finished difference Result 1202 states and 1466 transitions. [2022-07-22 00:15:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:27,298 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 [2022-07-22 00:15:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:27,301 INFO L225 Difference]: With dead ends: 1202 [2022-07-22 00:15:27,301 INFO L226 Difference]: Without dead ends: 1202 [2022-07-22 00:15:27,301 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 [2022-07-22 00:15:27,302 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 930 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 2028 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 [2022-07-22 00:15:27,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 2028 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:15:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-07-22 00:15:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1200. [2022-07-22 00:15:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 759 states have (on average 1.8945981554677207) internal successors, (1438), 1183 states have internal predecessors, (1438), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1464 transitions. [2022-07-22 00:15:27,315 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1464 transitions. Word has length 21 [2022-07-22 00:15:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:27,316 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1464 transitions. [2022-07-22 00:15:27,316 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) [2022-07-22 00:15:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1464 transitions. [2022-07-22 00:15:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 00:15:27,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:27,317 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] [2022-07-22 00:15:27,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:27,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-22 00:15:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:27,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738007583] [2022-07-22 00:15:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:27,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:27,530 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) [2022-07-22 00:15:27,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 00:15:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 00:15:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:27,681 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 [2022-07-22 00:15:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:27,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:27,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738007583] [2022-07-22 00:15:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738007583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:27,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35730737] [2022-07-22 00:15:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:15:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:15:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:15:27,735 INFO L87 Difference]: Start difference. First operand 1200 states and 1464 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) [2022-07-22 00:15:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:30,125 INFO L93 Difference]: Finished difference Result 2184 states and 2665 transitions. [2022-07-22 00:15:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:15:30,127 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 [2022-07-22 00:15:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:30,132 INFO L225 Difference]: With dead ends: 2184 [2022-07-22 00:15:30,132 INFO L226 Difference]: Without dead ends: 2184 [2022-07-22 00:15:30,132 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 [2022-07-22 00:15:30,133 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 2037 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:30,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 2019 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 00:15:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-07-22 00:15:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1196. [2022-07-22 00:15:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 759 states have (on average 1.8840579710144927) internal successors, (1430), 1179 states have internal predecessors, (1430), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1456 transitions. [2022-07-22 00:15:30,155 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1456 transitions. Word has length 35 [2022-07-22 00:15:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:30,156 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 1456 transitions. [2022-07-22 00:15:30,156 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) [2022-07-22 00:15:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1456 transitions. [2022-07-22 00:15:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 00:15:30,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:30,159 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] [2022-07-22 00:15:30,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:30,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-22 00:15:30,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:30,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659266986] [2022-07-22 00:15:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:30,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:30,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:30,370 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) [2022-07-22 00:15:30,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 00:15:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:15:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:30,566 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 [2022-07-22 00:15:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:30,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:30,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659266986] [2022-07-22 00:15:30,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659266986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:30,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:30,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944686804] [2022-07-22 00:15:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:15:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:15:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:15:30,694 INFO L87 Difference]: Start difference. First operand 1196 states and 1456 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) [2022-07-22 00:15:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:33,770 INFO L93 Difference]: Finished difference Result 1806 states and 2219 transitions. [2022-07-22 00:15:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:15:33,771 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 [2022-07-22 00:15:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:33,775 INFO L225 Difference]: With dead ends: 1806 [2022-07-22 00:15:33,775 INFO L226 Difference]: Without dead ends: 1806 [2022-07-22 00:15:33,775 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 [2022-07-22 00:15:33,776 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 1782 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:33,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1782 Valid, 2595 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 00:15:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-07-22 00:15:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1192. [2022-07-22 00:15:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 759 states have (on average 1.8735177865612649) internal successors, (1422), 1175 states have internal predecessors, (1422), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1448 transitions. [2022-07-22 00:15:33,793 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1448 transitions. Word has length 35 [2022-07-22 00:15:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:33,794 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1448 transitions. [2022-07-22 00:15:33,794 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) [2022-07-22 00:15:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1448 transitions. [2022-07-22 00:15:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 00:15:33,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:33,799 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] [2022-07-22 00:15:33,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:34,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:34,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2063927218, now seen corresponding path program 1 times [2022-07-22 00:15:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949399313] [2022-07-22 00:15:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:34,014 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) [2022-07-22 00:15:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 00:15:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:34,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:15:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:34,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:34,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:34,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949399313] [2022-07-22 00:15:34,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949399313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:34,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:34,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465199124] [2022-07-22 00:15:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:15:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:15:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:15:34,258 INFO L87 Difference]: Start difference. First operand 1192 states and 1448 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) [2022-07-22 00:15:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:34,312 INFO L93 Difference]: Finished difference Result 1180 states and 1428 transitions. [2022-07-22 00:15:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:34,313 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 [2022-07-22 00:15:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:34,317 INFO L225 Difference]: With dead ends: 1180 [2022-07-22 00:15:34,317 INFO L226 Difference]: Without dead ends: 1180 [2022-07-22 00:15:34,318 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 [2022-07-22 00:15:34,319 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 906 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2006 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 [2022-07-22 00:15:34,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 2006 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:15:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-22 00:15:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2022-07-22 00:15:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 747 states have (on average 1.8768406961178046) internal successors, (1402), 1163 states have internal predecessors, (1402), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 00:15:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1428 transitions. [2022-07-22 00:15:34,334 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1428 transitions. Word has length 54 [2022-07-22 00:15:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:34,334 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1428 transitions. [2022-07-22 00:15:34,334 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) [2022-07-22 00:15:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1428 transitions. [2022-07-22 00:15:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 00:15:34,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:34,336 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] [2022-07-22 00:15:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:34,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:34,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash -203140862, now seen corresponding path program 1 times [2022-07-22 00:15:34,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:34,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60491783] [2022-07-22 00:15:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:34,549 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) [2022-07-22 00:15:34,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 00:15:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:34,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:15:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:34,878 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-22 00:15:34,878 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 [2022-07-22 00:15:34,924 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-22 00:15:34,925 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 [2022-07-22 00:15:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:35,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:35,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60491783] [2022-07-22 00:15:35,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60491783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:35,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:35,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391025328] [2022-07-22 00:15:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 00:15:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 00:15:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:15:35,571 INFO L87 Difference]: Start difference. First operand 1180 states and 1428 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) [2022-07-22 00:15:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:37,552 INFO L93 Difference]: Finished difference Result 2632 states and 3156 transitions. [2022-07-22 00:15:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:15:37,552 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 [2022-07-22 00:15:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:37,558 INFO L225 Difference]: With dead ends: 2632 [2022-07-22 00:15:37,559 INFO L226 Difference]: Without dead ends: 2632 [2022-07-22 00:15:37,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 00:15:37,559 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 1419 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1284 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:37,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1419 Valid, 3021 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1051 Invalid, 0 Unknown, 1284 Unchecked, 1.9s Time] [2022-07-22 00:15:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-22 00:15:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 1617. [2022-07-22 00:15:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1169 states have (on average 1.872540633019675) internal successors, (2189), 1588 states have internal predecessors, (2189), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 00:15:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2239 transitions. [2022-07-22 00:15:37,596 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2239 transitions. Word has length 62 [2022-07-22 00:15:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:37,597 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 2239 transitions. [2022-07-22 00:15:37,597 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) [2022-07-22 00:15:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2239 transitions. [2022-07-22 00:15:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 00:15:37,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:37,598 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] [2022-07-22 00:15:37,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-22 00:15:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:37,808 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash -203140861, now seen corresponding path program 1 times [2022-07-22 00:15:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:37,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116441875] [2022-07-22 00:15:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:37,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:37,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:37,811 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) [2022-07-22 00:15:37,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 00:15:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 00:15:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 00:15:38,171 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 [2022-07-22 00:15:38,207 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:15:38,207 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 [2022-07-22 00:15:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:38,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:38,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116441875] [2022-07-22 00:15:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116441875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:38,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:38,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:15:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802811837] [2022-07-22 00:15:38,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:38,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 00:15:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 00:15:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:15:38,555 INFO L87 Difference]: Start difference. First operand 1617 states and 2239 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) [2022-07-22 00:15:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:40,913 INFO L93 Difference]: Finished difference Result 1623 states and 2246 transitions. [2022-07-22 00:15:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:15:40,913 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 [2022-07-22 00:15:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:40,927 INFO L225 Difference]: With dead ends: 1623 [2022-07-22 00:15:40,927 INFO L226 Difference]: Without dead ends: 1623 [2022-07-22 00:15:40,928 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 [2022-07-22 00:15:40,928 INFO L413 NwaCegarLoop]: 960 mSDtfsCounter, 111 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:40,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2476 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 00:15:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-07-22 00:15:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1622. [2022-07-22 00:15:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1173 states have (on average 1.8695652173913044) internal successors, (2193), 1592 states have internal predecessors, (2193), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 00:15:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2245 transitions. [2022-07-22 00:15:40,987 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2245 transitions. Word has length 62 [2022-07-22 00:15:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:40,988 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2245 transitions. [2022-07-22 00:15:40,988 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) [2022-07-22 00:15:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2245 transitions. [2022-07-22 00:15:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 00:15:40,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:40,989 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] [2022-07-22 00:15:41,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:41,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1864793253, now seen corresponding path program 1 times [2022-07-22 00:15:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967529971] [2022-07-22 00:15:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:41,203 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) [2022-07-22 00:15:41,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 00:15:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 00:15:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:41,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:41,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967529971] [2022-07-22 00:15:41,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967529971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:41,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:41,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 00:15:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338582615] [2022-07-22 00:15:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:41,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 00:15:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 00:15:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:15:41,484 INFO L87 Difference]: Start difference. First operand 1622 states and 2245 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) [2022-07-22 00:15:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:41,591 INFO L93 Difference]: Finished difference Result 1648 states and 2272 transitions. [2022-07-22 00:15:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:15:41,591 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 [2022-07-22 00:15:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:41,596 INFO L225 Difference]: With dead ends: 1648 [2022-07-22 00:15:41,596 INFO L226 Difference]: Without dead ends: 1648 [2022-07-22 00:15:41,598 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 [2022-07-22 00:15:41,598 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 19 mSDsluCounter, 3890 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4865 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 [2022-07-22 00:15:41,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 4865 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:15:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-07-22 00:15:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1646. [2022-07-22 00:15:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1191 states have (on average 1.8606213266162888) internal successors, (2216), 1612 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 11 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 00:15:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2272 transitions. [2022-07-22 00:15:41,626 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2272 transitions. Word has length 68 [2022-07-22 00:15:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:41,626 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 2272 transitions. [2022-07-22 00:15:41,627 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) [2022-07-22 00:15:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2272 transitions. [2022-07-22 00:15:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 00:15:41,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:41,632 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] [2022-07-22 00:15:41,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:41,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:41,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1913615011, now seen corresponding path program 1 times [2022-07-22 00:15:41,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:41,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452104649] [2022-07-22 00:15:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:41,860 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) [2022-07-22 00:15:41,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 00:15:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:15:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:42,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:42,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452104649] [2022-07-22 00:15:42,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452104649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:42,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:42,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 00:15:42,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226675731] [2022-07-22 00:15:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:42,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 00:15:42,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 00:15:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:15:42,264 INFO L87 Difference]: Start difference. First operand 1646 states and 2272 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) [2022-07-22 00:15:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:42,392 INFO L93 Difference]: Finished difference Result 1658 states and 2286 transitions. [2022-07-22 00:15:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:15:42,393 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 [2022-07-22 00:15:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:42,397 INFO L225 Difference]: With dead ends: 1658 [2022-07-22 00:15:42,397 INFO L226 Difference]: Without dead ends: 1658 [2022-07-22 00:15:42,397 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 [2022-07-22 00:15:42,398 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 23 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:42,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3799 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:15:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-07-22 00:15:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1649. [2022-07-22 00:15:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1193 states have (on average 1.859178541492037) internal successors, (2218), 1614 states have internal predecessors, (2218), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 00:15:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2275 transitions. [2022-07-22 00:15:42,431 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2275 transitions. Word has length 68 [2022-07-22 00:15:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:42,431 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2275 transitions. [2022-07-22 00:15:42,431 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) [2022-07-22 00:15:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2275 transitions. [2022-07-22 00:15:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 00:15:42,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:42,432 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] [2022-07-22 00:15:42,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:42,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999061, now seen corresponding path program 1 times [2022-07-22 00:15:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309677964] [2022-07-22 00:15:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:42,646 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) [2022-07-22 00:15:42,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 00:15:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:15:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:43,026 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 [2022-07-22 00:15:43,151 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-22 00:15:43,151 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 [2022-07-22 00:15:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:43,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:43,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309677964] [2022-07-22 00:15:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309677964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:43,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:43,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 00:15:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202460387] [2022-07-22 00:15:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 00:15:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 00:15:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:15:43,160 INFO L87 Difference]: Start difference. First operand 1649 states and 2275 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) [2022-07-22 00:15:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:45,610 INFO L93 Difference]: Finished difference Result 2771 states and 3753 transitions. [2022-07-22 00:15:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:15:45,611 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 [2022-07-22 00:15:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:45,616 INFO L225 Difference]: With dead ends: 2771 [2022-07-22 00:15:45,616 INFO L226 Difference]: Without dead ends: 2771 [2022-07-22 00:15:45,616 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 [2022-07-22 00:15:45,617 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1430 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 2987 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2110 Invalid, 0 Unknown, 691 Unchecked, 2.4s Time] [2022-07-22 00:15:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-07-22 00:15:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1648. [2022-07-22 00:15:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1193 states have (on average 1.8575020955574182) internal successors, (2216), 1613 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 00:15:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2273 transitions. [2022-07-22 00:15:45,638 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2273 transitions. Word has length 73 [2022-07-22 00:15:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:45,639 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2273 transitions. [2022-07-22 00:15:45,639 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) [2022-07-22 00:15:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2273 transitions. [2022-07-22 00:15:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 00:15:45,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:45,643 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] [2022-07-22 00:15:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:45,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999062, now seen corresponding path program 1 times [2022-07-22 00:15:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:45,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436844829] [2022-07-22 00:15:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:45,857 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) [2022-07-22 00:15:45,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 00:15:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 00:15:46,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:46,256 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 [2022-07-22 00:15:46,262 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 [2022-07-22 00:15:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 00:15:48,511 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 [2022-07-22 00:15:48,517 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 00:15:48,518 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 [2022-07-22 00:15:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:48,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:48,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:48,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436844829] [2022-07-22 00:15:48,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436844829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:48,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:48,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 00:15:48,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100839153] [2022-07-22 00:15:48,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:48,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 00:15:48,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:48,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 00:15:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2022-07-22 00:15:48,531 INFO L87 Difference]: Start difference. First operand 1648 states and 2273 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) [2022-07-22 00:15:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:53,211 INFO L93 Difference]: Finished difference Result 2842 states and 3878 transitions. [2022-07-22 00:15:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 00:15:53,212 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 [2022-07-22 00:15:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:53,215 INFO L225 Difference]: With dead ends: 2842 [2022-07-22 00:15:53,215 INFO L226 Difference]: Without dead ends: 2842 [2022-07-22 00:15:53,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-07-22 00:15:53,216 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 1644 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 3697 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 4788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:53,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 3361 Invalid, 4788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3697 Invalid, 0 Unknown, 1064 Unchecked, 4.6s Time] [2022-07-22 00:15:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-07-22 00:15:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1644. [2022-07-22 00:15:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1197 states have (on average 1.8412698412698412) internal successors, (2204), 1609 states have internal predecessors, (2204), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 00:15:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2261 transitions. [2022-07-22 00:15:53,235 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2261 transitions. Word has length 73 [2022-07-22 00:15:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:53,236 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 2261 transitions. [2022-07-22 00:15:53,236 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) [2022-07-22 00:15:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2261 transitions. [2022-07-22 00:15:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 00:15:53,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:53,237 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] [2022-07-22 00:15:53,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 00:15:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:53,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash 816968073, now seen corresponding path program 1 times [2022-07-22 00:15:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:53,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520998625] [2022-07-22 00:15:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:53,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:53,452 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) [2022-07-22 00:15:53,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 00:15:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:53,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 00:15:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:53,736 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 [2022-07-22 00:15:53,748 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 [2022-07-22 00:15:53,779 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 [2022-07-22 00:15:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:53,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:53,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520998625] [2022-07-22 00:15:53,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520998625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:53,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:53,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 00:15:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47968091] [2022-07-22 00:15:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 00:15:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 00:15:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 00:15:53,804 INFO L87 Difference]: Start difference. First operand 1644 states and 2261 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) [2022-07-22 00:15:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:15:56,407 INFO L93 Difference]: Finished difference Result 1659 states and 2277 transitions. [2022-07-22 00:15:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 00:15:56,407 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 [2022-07-22 00:15:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:15:56,410 INFO L225 Difference]: With dead ends: 1659 [2022-07-22 00:15:56,410 INFO L226 Difference]: Without dead ends: 1659 [2022-07-22 00:15:56,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 00:15:56,410 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 23 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 00:15:56,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4082 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 00:15:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-22 00:15:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1658. [2022-07-22 00:15:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.836228287841191) internal successors, (2220), 1621 states have internal predecessors, (2220), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 00:15:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2277 transitions. [2022-07-22 00:15:56,443 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2277 transitions. Word has length 80 [2022-07-22 00:15:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:15:56,443 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2277 transitions. [2022-07-22 00:15:56,444 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) [2022-07-22 00:15:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2277 transitions. [2022-07-22 00:15:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 00:15:56,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:15:56,445 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] [2022-07-22 00:15:56,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-22 00:15:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:15:56,656 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:15:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:15:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash -443793445, now seen corresponding path program 1 times [2022-07-22 00:15:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:15:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136453049] [2022-07-22 00:15:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:15:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:15:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:15:56,658 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) [2022-07-22 00:15:56,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 00:15:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:15:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 00:15:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:15:56,957 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 [2022-07-22 00:15:56,984 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 [2022-07-22 00:15:56,994 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 [2022-07-22 00:15:57,032 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 [2022-07-22 00:15:57,035 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 [2022-07-22 00:15:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:15:57,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:15:57,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:15:57,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136453049] [2022-07-22 00:15:57,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136453049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:15:57,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:15:57,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 00:15:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507608837] [2022-07-22 00:15:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:15:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:15:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:15:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:15:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 00:15:57,080 INFO L87 Difference]: Start difference. First operand 1658 states and 2277 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) [2022-07-22 00:16:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:00,991 INFO L93 Difference]: Finished difference Result 1658 states and 2275 transitions. [2022-07-22 00:16:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 00:16:00,992 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 [2022-07-22 00:16:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:00,994 INFO L225 Difference]: With dead ends: 1658 [2022-07-22 00:16:00,994 INFO L226 Difference]: Without dead ends: 1658 [2022-07-22 00:16:00,995 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 [2022-07-22 00:16:00,996 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 19 mSDsluCounter, 3924 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:00,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 4880 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-22 00:16:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-07-22 00:16:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2022-07-22 00:16:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.8345740281224152) internal successors, (2218), 1621 states have internal predecessors, (2218), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 00:16:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2275 transitions. [2022-07-22 00:16:01,013 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2275 transitions. Word has length 81 [2022-07-22 00:16:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:01,013 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2275 transitions. [2022-07-22 00:16:01,013 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) [2022-07-22 00:16:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2275 transitions. [2022-07-22 00:16:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 00:16:01,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:01,014 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] [2022-07-22 00:16:01,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:01,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:01,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash 540063607, now seen corresponding path program 1 times [2022-07-22 00:16:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:01,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137374757] [2022-07-22 00:16:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:16:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:01,227 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) [2022-07-22 00:16:01,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 00:16:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:16:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 00:16:01,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:01,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:16:01,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137374757] [2022-07-22 00:16:01,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137374757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:16:01,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:16:01,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 00:16:01,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781083874] [2022-07-22 00:16:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:16:01,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:16:01,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:16:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:16:01,530 INFO L87 Difference]: Start difference. First operand 1658 states and 2275 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) [2022-07-22 00:16:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:01,583 INFO L93 Difference]: Finished difference Result 1674 states and 2293 transitions. [2022-07-22 00:16:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:16:01,584 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 [2022-07-22 00:16:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:01,587 INFO L225 Difference]: With dead ends: 1674 [2022-07-22 00:16:01,587 INFO L226 Difference]: Without dead ends: 1668 [2022-07-22 00:16:01,587 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 [2022-07-22 00:16:01,588 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 10 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3840 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:01,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3840 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:16:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-07-22 00:16:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1668. [2022-07-22 00:16:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1217 states have (on average 1.8307313064913722) internal successors, (2228), 1631 states have internal predecessors, (2228), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:16:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2287 transitions. [2022-07-22 00:16:01,643 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2287 transitions. Word has length 88 [2022-07-22 00:16:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:01,644 INFO L495 AbstractCegarLoop]: Abstraction has 1668 states and 2287 transitions. [2022-07-22 00:16:01,644 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) [2022-07-22 00:16:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2287 transitions. [2022-07-22 00:16:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 00:16:01,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:01,645 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] [2022-07-22 00:16:01,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:01,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:01,856 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1380796229, now seen corresponding path program 1 times [2022-07-22 00:16:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775774240] [2022-07-22 00:16:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:16:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:01,858 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) [2022-07-22 00:16:01,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 00:16:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:16:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:16:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:02,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:02,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775774240] [2022-07-22 00:16:02,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775774240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:16:02,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:16:02,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-22 00:16:02,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259786294] [2022-07-22 00:16:02,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:16:02,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 00:16:02,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:02,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 00:16:02,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 00:16:02,340 INFO L87 Difference]: Start difference. First operand 1668 states and 2287 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) [2022-07-22 00:16:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:02,533 INFO L93 Difference]: Finished difference Result 1694 states and 2317 transitions. [2022-07-22 00:16:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 00:16:02,554 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 [2022-07-22 00:16:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:02,557 INFO L225 Difference]: With dead ends: 1694 [2022-07-22 00:16:02,558 INFO L226 Difference]: Without dead ends: 1682 [2022-07-22 00:16:02,559 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 [2022-07-22 00:16:02,559 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 50 mSDsluCounter, 5759 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6726 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:02,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6726 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:16:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-07-22 00:16:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1676. [2022-07-22 00:16:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1225 states have (on average 1.826938775510204) internal successors, (2238), 1639 states have internal predecessors, (2238), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:16:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2297 transitions. [2022-07-22 00:16:02,582 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2297 transitions. Word has length 89 [2022-07-22 00:16:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:02,583 INFO L495 AbstractCegarLoop]: Abstraction has 1676 states and 2297 transitions. [2022-07-22 00:16:02,583 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) [2022-07-22 00:16:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2297 transitions. [2022-07-22 00:16:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 00:16:02,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:02,584 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] [2022-07-22 00:16:02,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:02,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:02,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 180173559, now seen corresponding path program 2 times [2022-07-22 00:16:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218060341] [2022-07-22 00:16:02,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:16:02,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:02,817 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) [2022-07-22 00:16:02,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 00:16:03,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:16:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:16:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:16:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:03,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:03,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218060341] [2022-07-22 00:16:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218060341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:16:03,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:16:03,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 00:16:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408988503] [2022-07-22 00:16:03,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:16:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 00:16:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 00:16:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:16:03,761 INFO L87 Difference]: Start difference. First operand 1676 states and 2297 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) [2022-07-22 00:16:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:04,330 INFO L93 Difference]: Finished difference Result 1730 states and 2365 transitions. [2022-07-22 00:16:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 00:16:04,338 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 [2022-07-22 00:16:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:04,341 INFO L225 Difference]: With dead ends: 1730 [2022-07-22 00:16:04,341 INFO L226 Difference]: Without dead ends: 1718 [2022-07-22 00:16:04,342 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 [2022-07-22 00:16:04,342 INFO L413 NwaCegarLoop]: 973 mSDtfsCounter, 88 mSDsluCounter, 6763 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 7736 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:04,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 7736 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:16:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-07-22 00:16:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1694. [2022-07-22 00:16:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1243 states have (on average 1.819790828640386) internal successors, (2262), 1657 states have internal predecessors, (2262), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:16:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2321 transitions. [2022-07-22 00:16:04,402 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2321 transitions. Word has length 92 [2022-07-22 00:16:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:04,403 INFO L495 AbstractCegarLoop]: Abstraction has 1694 states and 2321 transitions. [2022-07-22 00:16:04,403 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) [2022-07-22 00:16:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2321 transitions. [2022-07-22 00:16:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 00:16:04,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:04,405 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] [2022-07-22 00:16:04,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:04,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:04,617 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash -231196617, now seen corresponding path program 3 times [2022-07-22 00:16:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:04,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795903263] [2022-07-22 00:16:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:16:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:04,620 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) [2022-07-22 00:16:04,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-22 00:16:05,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 00:16:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:16:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 00:16:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:05,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:06,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:06,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795903263] [2022-07-22 00:16:06,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795903263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:16:06,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:16:06,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-22 00:16:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820909106] [2022-07-22 00:16:06,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:16:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 00:16:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 00:16:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-22 00:16:06,543 INFO L87 Difference]: Start difference. First operand 1694 states and 2321 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) [2022-07-22 00:16:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:09,554 INFO L93 Difference]: Finished difference Result 1802 states and 2469 transitions. [2022-07-22 00:16:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 00:16:09,555 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 [2022-07-22 00:16:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:09,558 INFO L225 Difference]: With dead ends: 1802 [2022-07-22 00:16:09,559 INFO L226 Difference]: Without dead ends: 1784 [2022-07-22 00:16:09,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 00:16:09,560 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 195 mSDsluCounter, 12709 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 13694 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:09,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 13694 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 00:16:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-07-22 00:16:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1730. [2022-07-22 00:16:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1279 states have (on average 1.8045347928068804) internal successors, (2308), 1693 states have internal predecessors, (2308), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:16:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2367 transitions. [2022-07-22 00:16:09,602 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2367 transitions. Word has length 98 [2022-07-22 00:16:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:09,603 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2367 transitions. [2022-07-22 00:16:09,603 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) [2022-07-22 00:16:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2367 transitions. [2022-07-22 00:16:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-22 00:16:09,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:09,604 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] [2022-07-22 00:16:09,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:09,820 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash 922313399, now seen corresponding path program 4 times [2022-07-22 00:16:09,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:09,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130206813] [2022-07-22 00:16:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:16:09,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:09,827 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) [2022-07-22 00:16:09,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 00:16:10,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:16:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:16:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 00:16:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:10,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:16:12,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130206813] [2022-07-22 00:16:12,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130206813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:16:12,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:16:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 00:16:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313661425] [2022-07-22 00:16:12,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:16:12,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 00:16:12,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 00:16:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 00:16:12,608 INFO L87 Difference]: Start difference. First operand 1730 states and 2367 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) [2022-07-22 00:16:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:16:23,659 INFO L93 Difference]: Finished difference Result 1936 states and 2637 transitions. [2022-07-22 00:16:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 00:16:23,660 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 [2022-07-22 00:16:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:16:23,668 INFO L225 Difference]: With dead ends: 1936 [2022-07-22 00:16:23,669 INFO L226 Difference]: Without dead ends: 1924 [2022-07-22 00:16:23,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4121, Invalid=9921, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 00:16:23,684 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 478 mSDsluCounter, 26903 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 27910 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:16:23,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 27910 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 00:16:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-07-22 00:16:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1798. [2022-07-22 00:16:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1347 states have (on average 1.78173719376392) internal successors, (2400), 1761 states have internal predecessors, (2400), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:16:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2459 transitions. [2022-07-22 00:16:23,732 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2459 transitions. Word has length 110 [2022-07-22 00:16:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:16:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2459 transitions. [2022-07-22 00:16:23,733 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) [2022-07-22 00:16:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2459 transitions. [2022-07-22 00:16:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 00:16:23,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:16:23,735 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] [2022-07-22 00:16:23,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-22 00:16:23,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:16:23,936 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:16:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:16:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 897981943, now seen corresponding path program 5 times [2022-07-22 00:16:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:16:23,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025488278] [2022-07-22 00:16:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:16:23,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:16:23,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:16:23,952 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) [2022-07-22 00:16:24,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-22 00:16:25,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-22 00:16:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:16:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 00:16:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:25,840 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 [2022-07-22 00:16:26,020 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-22 00:16:26,021 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 [2022-07-22 00:16:26,063 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 [2022-07-22 00:16:26,862 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 [2022-07-22 00:16:29,367 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:16:29,367 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 [2022-07-22 00:16:29,416 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 [2022-07-22 00:16:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-22 00:16:29,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:29,968 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2663 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_2663) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-22 00:16:29,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:16:29,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025488278] [2022-07-22 00:16:29,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025488278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:16:29,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916416485] [2022-07-22 00:16:29,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:16:29,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 00:16:29,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 00:16:29,975 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) [2022-07-22 00:16:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-22 00:18:19,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-22 00:18:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:18:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-22 00:18:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:18:19,405 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 [2022-07-22 00:18:19,491 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-22 00:18:19,491 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 [2022-07-22 00:18:19,501 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 [2022-07-22 00:18:19,544 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 [2022-07-22 00:18:20,985 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:18:20,986 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 [2022-07-22 00:18:21,032 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 [2022-07-22 00:18:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-22 00:18:21,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:18:21,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916416485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:18:21,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:18:21,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-22 00:18:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118246707] [2022-07-22 00:18:21,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:18:21,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 00:18:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:18:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 00:18:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=215, Unknown=18, NotChecked=30, Total=306 [2022-07-22 00:18:21,312 INFO L87 Difference]: Start difference. First operand 1798 states and 2459 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) [2022-07-22 00:18:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:18:28,014 INFO L93 Difference]: Finished difference Result 3156 states and 4275 transitions. [2022-07-22 00:18:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 00:18:28,015 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 [2022-07-22 00:18:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:18:28,020 INFO L225 Difference]: With dead ends: 3156 [2022-07-22 00:18:28,020 INFO L226 Difference]: Without dead ends: 3156 [2022-07-22 00:18:28,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 165 SyntacticMatches, 90 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=97, Invalid=480, Unknown=27, NotChecked=46, Total=650 [2022-07-22 00:18:28,020 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 1615 mSDsluCounter, 8109 mSDsCounter, 0 mSdLazyCounter, 5435 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 8971 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5539 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:18:28,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 8971 Invalid, 11004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5435 Invalid, 0 Unknown, 5539 Unchecked, 6.4s Time] [2022-07-22 00:18:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2022-07-22 00:18:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 1795. [2022-07-22 00:18:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1347 states have (on average 1.77728285077951) internal successors, (2394), 1758 states have internal predecessors, (2394), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2022-07-22 00:18:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2453 transitions. [2022-07-22 00:18:28,041 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2453 transitions. Word has length 132 [2022-07-22 00:18:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:18:28,042 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2453 transitions. [2022-07-22 00:18:28,042 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) [2022-07-22 00:18:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2453 transitions. [2022-07-22 00:18:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 00:18:28,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:18:28,043 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] [2022-07-22 00:18:28,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-22 00:18:28,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-22 00:18:28,463 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 [2022-07-22 00:18:28,463 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 528 more)] === [2022-07-22 00:18:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:18:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 897981944, now seen corresponding path program 1 times [2022-07-22 00:18:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:18:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967893883] [2022-07-22 00:18:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:18:28,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:18:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:18:28,466 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) [2022-07-22 00:18:28,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-22 00:18:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:18:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-22 00:18:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:18:29,311 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 [2022-07-22 00:18:29,500 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 [2022-07-22 00:18:29,531 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 00:18:29,532 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 [2022-07-22 00:18:29,555 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 [2022-07-22 00:18:29,564 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 [2022-07-22 00:18:29,656 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 [2022-07-22 00:18:29,659 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 [2022-07-22 00:18:30,976 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 [2022-07-22 00:18:31,012 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:18:31,012 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 [2022-07-22 00:18:31,016 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 [2022-07-22 00:18:31,056 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 [2022-07-22 00:18:31,060 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 [2022-07-22 00:18:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-22 00:18:31,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:18:31,890 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 [2022-07-22 00:18:31,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:18:31,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967893883] [2022-07-22 00:18:31,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967893883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:18:31,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1866252129] [2022-07-22 00:18:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:18:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 00:18:31,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 00:18:31,897 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) [2022-07-22 00:18:31,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process