./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:02:27,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:02:27,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:02:28,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:02:28,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:02:28,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:02:28,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:02:28,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:02:28,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:02:28,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:02:28,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:02:28,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:02:28,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:02:28,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:02:28,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:02:28,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:02:28,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:02:28,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:02:28,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:02:28,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:02:28,023 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:02:28,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:02:28,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:02:28,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:02:28,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:02:28,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:02:28,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:02:28,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:02:28,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:02:28,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:02:28,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:02:28,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:02:28,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:02:28,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:02:28,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:02:28,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:02:28,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:02:28,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:02:28,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:02:28,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:02:28,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:02:28,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:02:28,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 13:02:28,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:02:28,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:02:28,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:02:28,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:02:28,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:02:28,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:02:28,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:02:28,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:02:28,065 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:02:28,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:02:28,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:02:28,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:02:28,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:02:28,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:02:28,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:02:28,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:28,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:02:28,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:02:28,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 13:02:28,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 13:02:28,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 [2022-07-14 13:02:28,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:02:28,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:02:28,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:02:28,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:02:28,260 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:02:28,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-14 13:02:28,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e8899e7/cf7b56906cf64dbea9872050c67e1c76/FLAG70350e99f [2022-07-14 13:02:28,741 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:02:28,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-14 13:02:28,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e8899e7/cf7b56906cf64dbea9872050c67e1c76/FLAG70350e99f [2022-07-14 13:02:29,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e8899e7/cf7b56906cf64dbea9872050c67e1c76 [2022-07-14 13:02:29,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:02:29,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:02:29,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:29,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:02:29,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:02:29,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:29" (1/1) ... [2022-07-14 13:02:29,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28949e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:29, skipping insertion in model container [2022-07-14 13:02:29,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:29" (1/1) ... [2022-07-14 13:02:29,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:02:29,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:29,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-14 13:02:29,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-14 13:02:29,531 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-14 13:02:29,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-14 13:02:29,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:29,551 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 13:02:29,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@563ab36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:29, skipping insertion in model container [2022-07-14 13:02:29,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:29,553 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 13:02:29,555 INFO L158 Benchmark]: Toolchain (without parser) took 512.21ms. Allocated memory is still 109.1MB. Free memory was 74.5MB in the beginning and 70.8MB in the end (delta: 3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-14 13:02:29,555 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 13:02:29,557 INFO L158 Benchmark]: CACSL2BoogieTranslator took 510.29ms. Allocated memory is still 109.1MB. Free memory was 74.2MB in the beginning and 70.8MB in the end (delta: 3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 13:02:29,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 62.3MB in the beginning and 62.3MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 510.29ms. Allocated memory is still 109.1MB. Free memory was 74.2MB in the beginning and 70.8MB in the end (delta: 3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:02:31,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:02:31,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:02:31,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:02:31,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:02:31,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:02:31,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:02:31,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:02:31,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:02:31,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:02:31,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:02:31,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:02:31,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:02:31,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:02:31,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:02:31,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:02:31,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:02:31,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:02:31,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:02:31,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:02:31,328 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:02:31,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:02:31,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:02:31,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:02:31,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:02:31,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:02:31,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:02:31,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:02:31,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:02:31,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:02:31,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:02:31,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:02:31,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:02:31,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:02:31,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:02:31,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:02:31,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:02:31,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:02:31,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:02:31,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:02:31,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:02:31,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:02:31,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 13:02:31,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:02:31,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:02:31,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:02:31,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:02:31,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:02:31,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:02:31,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:02:31,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:02:31,377 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:02:31,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:02:31,378 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:02:31,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:02:31,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:02:31,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:02:31,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 13:02:31,379 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 13:02:31,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:02:31,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:02:31,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:02:31,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:02:31,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:02:31,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:31,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:02:31,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:02:31,381 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 13:02:31,381 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 13:02:31,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 13:02:31,381 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea247b245ebcaf5e735452e89c4110c7b9dc9b43836e98484a894783fc3462 [2022-07-14 13:02:31,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:02:31,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:02:31,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:02:31,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:02:31,662 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:02:31,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-14 13:02:31,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e55620/1833c1fe4a3d4123b30f2f8a4e46920f/FLAG6f73662af [2022-07-14 13:02:32,252 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:02:32,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i [2022-07-14 13:02:32,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e55620/1833c1fe4a3d4123b30f2f8a4e46920f/FLAG6f73662af [2022-07-14 13:02:32,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e55620/1833c1fe4a3d4123b30f2f8a4e46920f [2022-07-14 13:02:32,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:02:32,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:02:32,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:32,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:02:32,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:02:32,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:32" (1/1) ... [2022-07-14 13:02:32,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6375bdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:32, skipping insertion in model container [2022-07-14 13:02:32,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:02:32" (1/1) ... [2022-07-14 13:02:32,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:02:32,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:33,150 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-14 13:02:33,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-14 13:02:33,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-14 13:02:33,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-14 13:02:33,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:33,326 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 13:02:33,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:02:33,350 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-14 13:02:33,354 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44660,44673] [2022-07-14 13:02:33,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-14 13:02:33,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-14 13:02:33,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:33,414 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 13:02:33,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[44118,44131] [2022-07-14 13:02:33,457 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_FNV_test6-2.i[44660,44673] [2022-07-14 13:02:33,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56247,56260] [2022-07-14 13:02:33,481 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-2.i[56368,56381] [2022-07-14 13:02:33,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:02:33,540 INFO L208 MainTranslator]: Completed translation [2022-07-14 13:02:33,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33 WrapperNode [2022-07-14 13:02:33,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:02:33,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 13:02:33,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 13:02:33,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 13:02:33,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,660 INFO L137 Inliner]: procedures = 285, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1204 [2022-07-14 13:02:33,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 13:02:33,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 13:02:33,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 13:02:33,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 13:02:33,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 13:02:33,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 13:02:33,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 13:02:33,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 13:02:33,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (1/1) ... [2022-07-14 13:02:33,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:02:33,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:02:33,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 13:02:33,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 13:02:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 13:02:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 13:02:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-07-14 13:02:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-07-14 13:02:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-14 13:02:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-14 13:02:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 13:02:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 13:02:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-07-14 13:02:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-07-14 13:02:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 13:02:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-07-14 13:02:33,899 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-07-14 13:02:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 13:02:33,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 13:02:34,121 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 13:02:34,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 13:02:37,403 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 13:02:37,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 13:02:37,412 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2022-07-14 13:02:37,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:02:37 BoogieIcfgContainer [2022-07-14 13:02:37,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 13:02:37,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 13:02:37,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 13:02:37,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 13:02:37,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 01:02:32" (1/3) ... [2022-07-14 13:02:37,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f82e962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:02:37, skipping insertion in model container [2022-07-14 13:02:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:02:33" (2/3) ... [2022-07-14 13:02:37,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f82e962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:02:37, skipping insertion in model container [2022-07-14 13:02:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:02:37" (3/3) ... [2022-07-14 13:02:37,428 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test6-2.i [2022-07-14 13:02:37,439 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 13:02:37,439 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 634 error locations. [2022-07-14 13:02:37,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 13:02:37,506 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@53e6a088, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7dfd384 [2022-07-14 13:02:37,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 634 error locations. [2022-07-14 13:02:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-14 13:02:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:02:37,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:37,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:02:37,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2022-07-14 13:02:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:37,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795531875] [2022-07-14 13:02:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:37,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:37,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 13:02:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:02:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:37,786 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 [2022-07-14 13:02:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:37,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:37,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795531875] [2022-07-14 13:02:37,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795531875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:37,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:02:37,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210857523] [2022-07-14 13:02:37,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:37,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:37,853 INFO L87 Difference]: Start difference. First operand has 1280 states, 626 states have (on average 2.2444089456869007) internal successors, (1405), 1260 states have internal predecessors, (1405), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:39,169 INFO L93 Difference]: Finished difference Result 1537 states and 1627 transitions. [2022-07-14 13:02:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 13:02:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:39,192 INFO L225 Difference]: With dead ends: 1537 [2022-07-14 13:02:39,193 INFO L226 Difference]: Without dead ends: 1535 [2022-07-14 13:02:39,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:39,198 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 906 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:39,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1258 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-14 13:02:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-07-14 13:02:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1300. [2022-07-14 13:02:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 660 states have (on average 2.106060606060606) internal successors, (1390), 1281 states have internal predecessors, (1390), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-14 13:02:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1420 transitions. [2022-07-14 13:02:39,271 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1420 transitions. Word has length 3 [2022-07-14 13:02:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:39,272 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1420 transitions. [2022-07-14 13:02:39,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1420 transitions. [2022-07-14 13:02:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:02:39,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:39,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:02:39,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:39,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2022-07-14 13:02:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:39,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643208269] [2022-07-14 13:02:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:39,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:39,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:39,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 13:02:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:39,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:02:39,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:39,609 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 [2022-07-14 13:02:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:39,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:39,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643208269] [2022-07-14 13:02:39,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643208269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:39,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:39,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:02:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76972276] [2022-07-14 13:02:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:39,639 INFO L87 Difference]: Start difference. First operand 1300 states and 1420 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:42,276 INFO L93 Difference]: Finished difference Result 1891 states and 2058 transitions. [2022-07-14 13:02:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-14 13:02:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:42,282 INFO L225 Difference]: With dead ends: 1891 [2022-07-14 13:02:42,286 INFO L226 Difference]: Without dead ends: 1891 [2022-07-14 13:02:42,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:42,287 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 624 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:42,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1758 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-14 13:02:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-07-14 13:02:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1504. [2022-07-14 13:02:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 863 states have (on average 2.0880648899188876) internal successors, (1802), 1483 states have internal predecessors, (1802), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-14 13:02:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1836 transitions. [2022-07-14 13:02:42,320 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1836 transitions. Word has length 3 [2022-07-14 13:02:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:42,320 INFO L495 AbstractCegarLoop]: Abstraction has 1504 states and 1836 transitions. [2022-07-14 13:02:42,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1836 transitions. [2022-07-14 13:02:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:02:42,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:42,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:42,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:42,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2022-07-14 13:02:42,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946755642] [2022-07-14 13:02:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:42,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:42,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 13:02:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:42,674 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 [2022-07-14 13:02:42,679 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 [2022-07-14 13:02:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:02:42,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 13:02:42,734 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:02:42,734 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 [2022-07-14 13:02:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:42,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:42,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946755642] [2022-07-14 13:02:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946755642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:42,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418571412] [2022-07-14 13:02:42,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:42,760 INFO L87 Difference]: Start difference. First operand 1504 states and 1836 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:45,673 INFO L93 Difference]: Finished difference Result 2569 states and 2979 transitions. [2022-07-14 13:02:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:45,674 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 [2022-07-14 13:02:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:45,681 INFO L225 Difference]: With dead ends: 2569 [2022-07-14 13:02:45,682 INFO L226 Difference]: Without dead ends: 2569 [2022-07-14 13:02:45,682 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 [2022-07-14 13:02:45,688 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2002 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:45,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 1477 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-14 13:02:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-14 13:02:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1649. [2022-07-14 13:02:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1008 states have (on average 2.068452380952381) internal successors, (2085), 1628 states have internal predecessors, (2085), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-14 13:02:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2119 transitions. [2022-07-14 13:02:45,741 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2119 transitions. Word has length 8 [2022-07-14 13:02:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:45,741 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2119 transitions. [2022-07-14 13:02:45,744 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) [2022-07-14 13:02:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2119 transitions. [2022-07-14 13:02:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 13:02:45,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:45,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:45,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:45,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:45,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2022-07-14 13:02:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:45,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110198693] [2022-07-14 13:02:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:45,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:45,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:45,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:45,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 13:02:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:46,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:02:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:46,067 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 [2022-07-14 13:02:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:46,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:46,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110198693] [2022-07-14 13:02:46,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110198693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:46,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031819848] [2022-07-14 13:02:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:46,084 INFO L87 Difference]: Start difference. First operand 1649 states and 2119 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:48,733 INFO L93 Difference]: Finished difference Result 2811 states and 3512 transitions. [2022-07-14 13:02:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:02:48,735 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 [2022-07-14 13:02:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:48,742 INFO L225 Difference]: With dead ends: 2811 [2022-07-14 13:02:48,748 INFO L226 Difference]: Without dead ends: 2811 [2022-07-14 13:02:48,748 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 [2022-07-14 13:02:48,751 INFO L413 NwaCegarLoop]: 1321 mSDtfsCounter, 2333 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:48,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 2579 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-14 13:02:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-14 13:02:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1604. [2022-07-14 13:02:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1008 states have (on average 2.009920634920635) internal successors, (2026), 1583 states have internal predecessors, (2026), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-14 13:02:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2060 transitions. [2022-07-14 13:02:48,799 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2060 transitions. Word has length 9 [2022-07-14 13:02:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:48,800 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2060 transitions. [2022-07-14 13:02:48,800 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) [2022-07-14 13:02:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2060 transitions. [2022-07-14 13:02:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 13:02:48,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:48,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:48,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:49,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2022-07-14 13:02:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:49,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909082610] [2022-07-14 13:02:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:49,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:49,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 13:02:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:49,124 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 [2022-07-14 13:02:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:49,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:49,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909082610] [2022-07-14 13:02:49,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909082610] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:49,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:49,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:49,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086150069] [2022-07-14 13:02:49,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:49,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:49,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:49,165 INFO L87 Difference]: Start difference. First operand 1604 states and 2060 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:52,174 INFO L93 Difference]: Finished difference Result 2440 states and 3105 transitions. [2022-07-14 13:02:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:52,175 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 [2022-07-14 13:02:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:52,181 INFO L225 Difference]: With dead ends: 2440 [2022-07-14 13:02:52,181 INFO L226 Difference]: Without dead ends: 2440 [2022-07-14 13:02:52,181 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 [2022-07-14 13:02:52,181 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 1581 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:52,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2720 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-14 13:02:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-14 13:02:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1594. [2022-07-14 13:02:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1008 states have (on average 1.9861111111111112) internal successors, (2002), 1573 states have internal predecessors, (2002), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-14 13:02:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2036 transitions. [2022-07-14 13:02:52,204 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2036 transitions. Word has length 9 [2022-07-14 13:02:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:52,204 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2036 transitions. [2022-07-14 13:02:52,204 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) [2022-07-14 13:02:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2036 transitions. [2022-07-14 13:02:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 13:02:52,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:52,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:52,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:52,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2022-07-14 13:02:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:52,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086659192] [2022-07-14 13:02:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:52,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:52,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 13:02:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:52,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:02:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:52,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:52,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086659192] [2022-07-14 13:02:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086659192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:52,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:52,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:52,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54258385] [2022-07-14 13:02:52,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:52,600 INFO L87 Difference]: Start difference. First operand 1594 states and 2036 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:53,157 INFO L93 Difference]: Finished difference Result 2264 states and 2809 transitions. [2022-07-14 13:02:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:02:53,158 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 [2022-07-14 13:02:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:53,164 INFO L225 Difference]: With dead ends: 2264 [2022-07-14 13:02:53,164 INFO L226 Difference]: Without dead ends: 2264 [2022-07-14 13:02:53,164 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 [2022-07-14 13:02:53,164 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 748 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:53,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 3873 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 13:02:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-07-14 13:02:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1852. [2022-07-14 13:02:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1263 states have (on average 1.990498812351544) internal successors, (2514), 1828 states have internal predecessors, (2514), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-14 13:02:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2554 transitions. [2022-07-14 13:02:53,190 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2554 transitions. Word has length 11 [2022-07-14 13:02:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:53,190 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2554 transitions. [2022-07-14 13:02:53,190 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) [2022-07-14 13:02:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2554 transitions. [2022-07-14 13:02:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 13:02:53,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:53,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:53,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:53,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2126591358, now seen corresponding path program 1 times [2022-07-14 13:02:53,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971706095] [2022-07-14 13:02:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:53,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:53,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:53,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 13:02:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:02:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:53,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:53,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:53,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:02:53,593 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-14 13:02:53,594 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 [2022-07-14 13:02:53,622 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-14 13:02:53,622 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 [2022-07-14 13:02:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:53,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:53,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971706095] [2022-07-14 13:02:53,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971706095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:53,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:53,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086313202] [2022-07-14 13:02:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:53,634 INFO L87 Difference]: Start difference. First operand 1852 states and 2554 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:54,656 INFO L93 Difference]: Finished difference Result 2000 states and 2409 transitions. [2022-07-14 13:02:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:54,657 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 [2022-07-14 13:02:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:54,662 INFO L225 Difference]: With dead ends: 2000 [2022-07-14 13:02:54,662 INFO L226 Difference]: Without dead ends: 2000 [2022-07-14 13:02:54,662 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 [2022-07-14 13:02:54,662 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 501 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:54,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 3873 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-14 13:02:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2022-07-14 13:02:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1494. [2022-07-14 13:02:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 907 states have (on average 1.9757442116868797) internal successors, (1792), 1472 states have internal predecessors, (1792), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:02:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1828 transitions. [2022-07-14 13:02:54,680 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1828 transitions. Word has length 14 [2022-07-14 13:02:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:54,680 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1828 transitions. [2022-07-14 13:02:54,681 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) [2022-07-14 13:02:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1828 transitions. [2022-07-14 13:02:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 13:02:54,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:54,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:02:54,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:54,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2022-07-14 13:02:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:54,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017306095] [2022-07-14 13:02:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:54,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:54,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:54,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:54,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 13:02:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 13:02:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:55,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:55,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:55,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017306095] [2022-07-14 13:02:55,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017306095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:55,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:55,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:02:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147801702] [2022-07-14 13:02:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:02:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:02:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:02:55,049 INFO L87 Difference]: Start difference. First operand 1494 states and 1828 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:55,069 INFO L93 Difference]: Finished difference Result 1434 states and 1742 transitions. [2022-07-14 13:02:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:02:55,070 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 [2022-07-14 13:02:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:55,073 INFO L225 Difference]: With dead ends: 1434 [2022-07-14 13:02:55,073 INFO L226 Difference]: Without dead ends: 1434 [2022-07-14 13:02:55,074 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 [2022-07-14 13:02:55,074 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1165 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:55,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1308 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:02:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-14 13:02:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1434. [2022-07-14 13:02:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 871 states have (on average 1.9586681974741675) internal successors, (1706), 1412 states have internal predecessors, (1706), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:02:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1742 transitions. [2022-07-14 13:02:55,116 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1742 transitions. Word has length 19 [2022-07-14 13:02:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:55,116 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1742 transitions. [2022-07-14 13:02:55,116 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) [2022-07-14 13:02:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1742 transitions. [2022-07-14 13:02:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 13:02:55,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:55,117 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] [2022-07-14 13:02:55,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:55,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2022-07-14 13:02:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:55,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506780939] [2022-07-14 13:02:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:55,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:55,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:55,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 13:02:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:02:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:55,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:55,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506780939] [2022-07-14 13:02:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506780939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:55,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315257124] [2022-07-14 13:02:55,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:02:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:02:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:02:55,486 INFO L87 Difference]: Start difference. First operand 1434 states and 1742 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:55,543 INFO L93 Difference]: Finished difference Result 1406 states and 1686 transitions. [2022-07-14 13:02:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:02:55,544 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 [2022-07-14 13:02:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:55,547 INFO L225 Difference]: With dead ends: 1406 [2022-07-14 13:02:55,547 INFO L226 Difference]: Without dead ends: 1406 [2022-07-14 13:02:55,548 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 [2022-07-14 13:02:55,548 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 1136 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:55,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 2450 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:02:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-07-14 13:02:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2022-07-14 13:02:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 855 states have (on average 1.9274853801169591) internal successors, (1648), 1382 states have internal predecessors, (1648), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:02:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1684 transitions. [2022-07-14 13:02:55,563 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1684 transitions. Word has length 21 [2022-07-14 13:02:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:55,563 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1684 transitions. [2022-07-14 13:02:55,563 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) [2022-07-14 13:02:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1684 transitions. [2022-07-14 13:02:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 13:02:55,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:55,564 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] [2022-07-14 13:02:55,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:55,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:55,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2022-07-14 13:02:55,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:55,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135848761] [2022-07-14 13:02:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:55,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:55,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:55,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:55,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 13:02:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:02:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:56,010 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 [2022-07-14 13:02:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:56,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:56,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135848761] [2022-07-14 13:02:56,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135848761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:56,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:56,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299580382] [2022-07-14 13:02:56,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:02:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:02:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:56,062 INFO L87 Difference]: Start difference. First operand 1404 states and 1684 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:02:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:02:58,720 INFO L93 Difference]: Finished difference Result 2572 states and 3080 transitions. [2022-07-14 13:02:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:02:58,721 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 [2022-07-14 13:02:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:02:58,726 INFO L225 Difference]: With dead ends: 2572 [2022-07-14 13:02:58,726 INFO L226 Difference]: Without dead ends: 2572 [2022-07-14 13:02:58,726 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 [2022-07-14 13:02:58,727 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 2421 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:02:58,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 2737 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-14 13:02:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-07-14 13:02:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1400. [2022-07-14 13:02:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 855 states have (on average 1.9181286549707601) internal successors, (1640), 1378 states have internal predecessors, (1640), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:02:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1676 transitions. [2022-07-14 13:02:58,744 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1676 transitions. Word has length 35 [2022-07-14 13:02:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:02:58,744 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1676 transitions. [2022-07-14 13:02:58,744 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) [2022-07-14 13:02:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1676 transitions. [2022-07-14 13:02:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 13:02:58,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:02:58,747 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] [2022-07-14 13:02:58,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 13:02:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:02:58,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:02:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:02:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2022-07-14 13:02:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:02:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5097574] [2022-07-14 13:02:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:02:58,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:02:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:02:58,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:02:58,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 13:02:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:02:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 13:02:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:02:59,136 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 [2022-07-14 13:02:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:02:59,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:02:59,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:02:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5097574] [2022-07-14 13:02:59,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5097574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:02:59,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:02:59,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:02:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138178052] [2022-07-14 13:02:59,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:02:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:02:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:02:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:02:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:02:59,252 INFO L87 Difference]: Start difference. First operand 1400 states and 1676 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:03:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:02,592 INFO L93 Difference]: Finished difference Result 2214 states and 2659 transitions. [2022-07-14 13:03:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:03:02,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-14 13:03:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:02,598 INFO L225 Difference]: With dead ends: 2214 [2022-07-14 13:03:02,598 INFO L226 Difference]: Without dead ends: 2214 [2022-07-14 13:03:02,605 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 [2022-07-14 13:03:02,606 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 2194 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:02,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2194 Valid, 3317 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-14 13:03:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-07-14 13:03:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1396. [2022-07-14 13:03:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 855 states have (on average 1.9087719298245613) internal successors, (1632), 1374 states have internal predecessors, (1632), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:03:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1668 transitions. [2022-07-14 13:03:02,625 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1668 transitions. Word has length 35 [2022-07-14 13:03:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:02,625 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1668 transitions. [2022-07-14 13:03:02,625 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) [2022-07-14 13:03:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1668 transitions. [2022-07-14 13:03:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 13:03:02,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:02,640 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] [2022-07-14 13:03:02,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:02,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2063645645, now seen corresponding path program 1 times [2022-07-14 13:03:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:02,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830258411] [2022-07-14 13:03:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:02,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:03:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 13:03:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:03:03,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:03,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:03,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830258411] [2022-07-14 13:03:03,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830258411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:03,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:03,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:03:03,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714095397] [2022-07-14 13:03:03,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:03,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:03:03,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:03:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:03:03,095 INFO L87 Difference]: Start difference. First operand 1396 states and 1668 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:03:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:03,136 INFO L93 Difference]: Finished difference Result 1384 states and 1648 transitions. [2022-07-14 13:03:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:03:03,137 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 [2022-07-14 13:03:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:03,145 INFO L225 Difference]: With dead ends: 1384 [2022-07-14 13:03:03,146 INFO L226 Difference]: Without dead ends: 1384 [2022-07-14 13:03:03,146 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 [2022-07-14 13:03:03,147 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 1112 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:03,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 2428 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:03:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-14 13:03:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-14 13:03:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 843 states have (on average 1.9122182680901543) internal successors, (1612), 1362 states have internal predecessors, (1612), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 13:03:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1648 transitions. [2022-07-14 13:03:03,162 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1648 transitions. Word has length 54 [2022-07-14 13:03:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:03,162 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1648 transitions. [2022-07-14 13:03:03,162 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) [2022-07-14 13:03:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1648 transitions. [2022-07-14 13:03:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 13:03:03,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:03,164 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] [2022-07-14 13:03:03,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:03,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:03,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -202859289, now seen corresponding path program 1 times [2022-07-14 13:03:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330265956] [2022-07-14 13:03:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:03,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:03:03,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 13:03:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 13:03:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:03,731 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 13:03:03,731 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 [2022-07-14 13:03:03,786 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 13:03:03,786 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 [2022-07-14 13:03:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:04,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:04,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:04,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330265956] [2022-07-14 13:03:04,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330265956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:04,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:04,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:03:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850846327] [2022-07-14 13:03:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:03:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:03:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:04,336 INFO L87 Difference]: Start difference. First operand 1384 states and 1648 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:03:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:04,441 INFO L93 Difference]: Finished difference Result 1394 states and 1661 transitions. [2022-07-14 13:03:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:03:04,442 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 [2022-07-14 13:03:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:04,445 INFO L225 Difference]: With dead ends: 1394 [2022-07-14 13:03:04,446 INFO L226 Difference]: Without dead ends: 1394 [2022-07-14 13:03:04,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:04,446 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 61 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:04,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 2495 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 570 Unchecked, 0.1s Time] [2022-07-14 13:03:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-07-14 13:03:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1389. [2022-07-14 13:03:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9090909090909092) internal successors, (1617), 1366 states have internal predecessors, (1617), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-14 13:03:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1655 transitions. [2022-07-14 13:03:04,460 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1655 transitions. Word has length 62 [2022-07-14 13:03:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:04,460 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1655 transitions. [2022-07-14 13:03:04,460 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) [2022-07-14 13:03:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1655 transitions. [2022-07-14 13:03:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 13:03:04,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:04,461 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] [2022-07-14 13:03:04,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:04,671 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash -202859288, now seen corresponding path program 1 times [2022-07-14 13:03:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:04,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546242950] [2022-07-14 13:03:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:04,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:04,674 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:03:04,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 13:03:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 13:03:05,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:03:05,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 13:03:05,142 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:03:05,142 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 [2022-07-14 13:03:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:05,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:05,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:05,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546242950] [2022-07-14 13:03:05,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546242950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:05,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:05,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:03:05,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232259108] [2022-07-14 13:03:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:05,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:03:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:03:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:05,524 INFO L87 Difference]: Start difference. First operand 1389 states and 1655 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:03:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:08,162 INFO L93 Difference]: Finished difference Result 1390 states and 1655 transitions. [2022-07-14 13:03:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:03:08,162 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 [2022-07-14 13:03:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:08,165 INFO L225 Difference]: With dead ends: 1390 [2022-07-14 13:03:08,165 INFO L226 Difference]: Without dead ends: 1390 [2022-07-14 13:03:08,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:03:08,166 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 111 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 3016 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:08,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 3016 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-14 13:03:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-07-14 13:03:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1389. [2022-07-14 13:03:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 847 states have (on average 1.9079102715466352) internal successors, (1616), 1366 states have internal predecessors, (1616), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-14 13:03:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1654 transitions. [2022-07-14 13:03:08,186 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1654 transitions. Word has length 62 [2022-07-14 13:03:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 1654 transitions. [2022-07-14 13:03:08,187 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) [2022-07-14 13:03:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1654 transitions. [2022-07-14 13:03:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 13:03:08,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:08,188 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] [2022-07-14 13:03:08,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:08,399 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1136013504, now seen corresponding path program 1 times [2022-07-14 13:03:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405644527] [2022-07-14 13:03:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:08,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:08,422 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) [2022-07-14 13:03:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 13:03:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:03:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:08,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:08,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405644527] [2022-07-14 13:03:08,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405644527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:08,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:08,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 13:03:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845602923] [2022-07-14 13:03:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:03:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:03:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:08,689 INFO L87 Difference]: Start difference. First operand 1389 states and 1654 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:03:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:08,789 INFO L93 Difference]: Finished difference Result 1403 states and 1668 transitions. [2022-07-14 13:03:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:03:08,789 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 [2022-07-14 13:03:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:08,799 INFO L225 Difference]: With dead ends: 1403 [2022-07-14 13:03:08,799 INFO L226 Difference]: Without dead ends: 1403 [2022-07-14 13:03:08,801 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 [2022-07-14 13:03:08,802 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 19 mSDsluCounter, 4732 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:08,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5918 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:03:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-07-14 13:03:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2022-07-14 13:03:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 856 states have (on average 1.9018691588785046) internal successors, (1628), 1376 states have internal predecessors, (1628), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-14 13:03:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1668 transitions. [2022-07-14 13:03:08,823 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1668 transitions. Word has length 68 [2022-07-14 13:03:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:08,824 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1668 transitions. [2022-07-14 13:03:08,824 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) [2022-07-14 13:03:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1668 transitions. [2022-07-14 13:03:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 13:03:08,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:08,825 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] [2022-07-14 13:03:08,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:09,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,035 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:09,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1078181117, now seen corresponding path program 1 times [2022-07-14 13:03:09,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:09,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014729426] [2022-07-14 13:03:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:09,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:09,039 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) [2022-07-14 13:03:09,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 13:03:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:03:09,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:09,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:09,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014729426] [2022-07-14 13:03:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014729426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:09,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:09,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:03:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780848775] [2022-07-14 13:03:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:03:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:03:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:09,391 INFO L87 Difference]: Start difference. First operand 1401 states and 1668 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 13:03:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:09,522 INFO L93 Difference]: Finished difference Result 1407 states and 1675 transitions. [2022-07-14 13:03:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:03:09,523 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 [2022-07-14 13:03:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:09,525 INFO L225 Difference]: With dead ends: 1407 [2022-07-14 13:03:09,525 INFO L226 Difference]: Without dead ends: 1407 [2022-07-14 13:03:09,525 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 [2022-07-14 13:03:09,525 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 23 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 4635 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 4635 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:03:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-07-14 13:03:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2022-07-14 13:03:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 858 states have (on average 1.8997668997668997) internal successors, (1630), 1378 states have internal predecessors, (1630), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-14 13:03:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-14 13:03:09,540 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 68 [2022-07-14 13:03:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:09,540 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-14 13:03:09,540 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) [2022-07-14 13:03:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-14 13:03:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 13:03:09,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:09,541 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] [2022-07-14 13:03:09,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:09,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash 396897840, now seen corresponding path program 1 times [2022-07-14 13:03:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698410035] [2022-07-14 13:03:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:09,754 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) [2022-07-14 13:03:09,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 13:03:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:03:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:10,106 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 [2022-07-14 13:03:10,192 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 13:03:10,192 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 [2022-07-14 13:03:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:10,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:10,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:10,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698410035] [2022-07-14 13:03:10,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698410035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:10,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:10,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:03:10,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965855350] [2022-07-14 13:03:10,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:10,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:03:10,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:03:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:03:10,201 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:03:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:13,243 INFO L93 Difference]: Finished difference Result 2560 states and 3059 transitions. [2022-07-14 13:03:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:03:13,245 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 [2022-07-14 13:03:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:13,249 INFO L225 Difference]: With dead ends: 2560 [2022-07-14 13:03:13,249 INFO L226 Difference]: Without dead ends: 2560 [2022-07-14 13:03:13,249 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 [2022-07-14 13:03:13,250 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1622 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:13,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 3997 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2727 Invalid, 0 Unknown, 945 Unchecked, 3.0s Time] [2022-07-14 13:03:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-07-14 13:03:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1403. [2022-07-14 13:03:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 858 states have (on average 1.8986013986013985) internal successors, (1629), 1377 states have internal predecessors, (1629), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-14 13:03:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1670 transitions. [2022-07-14 13:03:13,290 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1670 transitions. Word has length 73 [2022-07-14 13:03:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:13,290 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1670 transitions. [2022-07-14 13:03:13,290 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) [2022-07-14 13:03:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1670 transitions. [2022-07-14 13:03:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 13:03:13,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:13,291 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] [2022-07-14 13:03:13,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:13,502 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 396897841, now seen corresponding path program 1 times [2022-07-14 13:03:13,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:13,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655239364] [2022-07-14 13:03:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:13,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:13,505 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) [2022-07-14 13:03:13,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 13:03:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 13:03:13,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:13,882 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 [2022-07-14 13:03:13,888 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 [2022-07-14 13:03:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:03:14,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 13:03:14,169 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:03:14,169 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 [2022-07-14 13:03:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:14,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:14,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:14,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655239364] [2022-07-14 13:03:14,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655239364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:14,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:14,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 13:03:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466116639] [2022-07-14 13:03:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 13:03:14,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:14,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 13:03:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:03:14,182 INFO L87 Difference]: Start difference. First operand 1403 states and 1670 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:03:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:18,788 INFO L93 Difference]: Finished difference Result 2630 states and 3192 transitions. [2022-07-14 13:03:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 13:03:18,788 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 [2022-07-14 13:03:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:18,791 INFO L225 Difference]: With dead ends: 2630 [2022-07-14 13:03:18,792 INFO L226 Difference]: Without dead ends: 2630 [2022-07-14 13:03:18,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:03:18,792 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2395 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 5029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:18,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2401 Valid, 3459 Invalid, 5029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3685 Invalid, 0 Unknown, 1309 Unchecked, 4.5s Time] [2022-07-14 13:03:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2022-07-14 13:03:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1397. [2022-07-14 13:03:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 1371 states have internal predecessors, (1623), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-14 13:03:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1664 transitions. [2022-07-14 13:03:18,815 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1664 transitions. Word has length 73 [2022-07-14 13:03:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:18,816 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1664 transitions. [2022-07-14 13:03:18,816 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) [2022-07-14 13:03:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1664 transitions. [2022-07-14 13:03:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-14 13:03:18,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:18,817 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] [2022-07-14 13:03:18,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:19,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:19,029 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1622258381, now seen corresponding path program 1 times [2022-07-14 13:03:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:19,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868712046] [2022-07-14 13:03:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:19,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:19,032 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) [2022-07-14 13:03:19,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 13:03:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 13:03:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:19,329 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 [2022-07-14 13:03:19,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 13:03:19,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 13:03:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:19,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:19,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868712046] [2022-07-14 13:03:19,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868712046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:19,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:19,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 13:03:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337960464] [2022-07-14 13:03:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:19,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 13:03:19,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 13:03:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:03:19,382 INFO L87 Difference]: Start difference. First operand 1397 states and 1664 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:03:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:22,312 INFO L93 Difference]: Finished difference Result 1405 states and 1672 transitions. [2022-07-14 13:03:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 13:03:22,312 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 [2022-07-14 13:03:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:22,314 INFO L225 Difference]: With dead ends: 1405 [2022-07-14 13:03:22,314 INFO L226 Difference]: Without dead ends: 1405 [2022-07-14 13:03:22,315 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 [2022-07-14 13:03:22,316 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 23 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:22,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4931 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-14 13:03:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-07-14 13:03:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1404. [2022-07-14 13:03:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.8833718244803694) internal successors, (1631), 1377 states have internal predecessors, (1631), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-14 13:03:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1672 transitions. [2022-07-14 13:03:22,355 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1672 transitions. Word has length 80 [2022-07-14 13:03:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:22,355 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1672 transitions. [2022-07-14 13:03:22,355 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) [2022-07-14 13:03:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1672 transitions. [2022-07-14 13:03:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 13:03:22,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:22,356 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] [2022-07-14 13:03:22,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-14 13:03:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:22,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1249597809, now seen corresponding path program 1 times [2022-07-14 13:03:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:22,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803488911] [2022-07-14 13:03:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:22,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:22,569 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) [2022-07-14 13:03:22,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 13:03:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 13:03:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:22,863 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 [2022-07-14 13:03:22,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 13:03:22,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 13:03:22,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 13:03:22,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 13:03:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:22,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:22,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803488911] [2022-07-14 13:03:22,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803488911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 13:03:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099393429] [2022-07-14 13:03:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 13:03:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 13:03:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-14 13:03:22,986 INFO L87 Difference]: Start difference. First operand 1404 states and 1672 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:03:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:27,468 INFO L93 Difference]: Finished difference Result 1404 states and 1671 transitions. [2022-07-14 13:03:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 13:03:27,469 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 [2022-07-14 13:03:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:27,471 INFO L225 Difference]: With dead ends: 1404 [2022-07-14 13:03:27,472 INFO L226 Difference]: Without dead ends: 1404 [2022-07-14 13:03:27,472 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 [2022-07-14 13:03:27,472 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 19 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:27,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5949 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-14 13:03:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-07-14 13:03:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1404. [2022-07-14 13:03:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 866 states have (on average 1.882217090069284) internal successors, (1630), 1377 states have internal predecessors, (1630), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-07-14 13:03:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1671 transitions. [2022-07-14 13:03:27,491 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1671 transitions. Word has length 81 [2022-07-14 13:03:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:27,491 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 1671 transitions. [2022-07-14 13:03:27,491 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) [2022-07-14 13:03:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1671 transitions. [2022-07-14 13:03:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-14 13:03:27,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:27,492 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] [2022-07-14 13:03:27,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:27,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:27,703 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash -63374884, now seen corresponding path program 1 times [2022-07-14 13:03:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963540189] [2022-07-14 13:03:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:27,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:27,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:27,705 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) [2022-07-14 13:03:27,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 13:03:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 13:03:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:28,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:03:28,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963540189] [2022-07-14 13:03:28,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963540189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:03:28,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:03:28,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:03:28,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851013072] [2022-07-14 13:03:28,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:03:28,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:03:28,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:03:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:03:28,021 INFO L87 Difference]: Start difference. First operand 1404 states and 1671 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 13:03:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:28,070 INFO L93 Difference]: Finished difference Result 1412 states and 1680 transitions. [2022-07-14 13:03:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:03:28,071 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 [2022-07-14 13:03:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:28,073 INFO L225 Difference]: With dead ends: 1412 [2022-07-14 13:03:28,073 INFO L226 Difference]: Without dead ends: 1409 [2022-07-14 13:03:28,074 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 [2022-07-14 13:03:28,074 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 13 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:28,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3514 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:03:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-14 13:03:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2022-07-14 13:03:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 870 states have (on average 1.8793103448275863) internal successors, (1635), 1382 states have internal predecessors, (1635), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:03:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1677 transitions. [2022-07-14 13:03:28,092 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1677 transitions. Word has length 88 [2022-07-14 13:03:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:28,093 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1677 transitions. [2022-07-14 13:03:28,093 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) [2022-07-14 13:03:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1677 transitions. [2022-07-14 13:03:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 13:03:28,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:28,094 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] [2022-07-14 13:03:28,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:28,304 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -407790698, now seen corresponding path program 1 times [2022-07-14 13:03:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707485280] [2022-07-14 13:03:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:03:28,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:28,307 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) [2022-07-14 13:03:28,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 13:03:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:03:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:03:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:28,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:28,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707485280] [2022-07-14 13:03:28,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707485280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:28,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:28,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 13:03:28,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011346561] [2022-07-14 13:03:28,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:28,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 13:03:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:28,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 13:03:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 13:03:28,775 INFO L87 Difference]: Start difference. First operand 1409 states and 1677 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:28,949 INFO L93 Difference]: Finished difference Result 1422 states and 1692 transitions. [2022-07-14 13:03:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 13:03:28,951 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 [2022-07-14 13:03:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:28,953 INFO L225 Difference]: With dead ends: 1422 [2022-07-14 13:03:28,953 INFO L226 Difference]: Without dead ends: 1416 [2022-07-14 13:03:28,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-07-14 13:03:28,954 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 45 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:28,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 5863 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:03:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-07-14 13:03:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1413. [2022-07-14 13:03:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 874 states have (on average 1.8764302059496567) internal successors, (1640), 1386 states have internal predecessors, (1640), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:03:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1682 transitions. [2022-07-14 13:03:28,969 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1682 transitions. Word has length 89 [2022-07-14 13:03:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:28,969 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1682 transitions. [2022-07-14 13:03:28,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1682 transitions. [2022-07-14 13:03:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-14 13:03:28,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:28,986 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] [2022-07-14 13:03:28,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-14 13:03:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:29,196 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1714460764, now seen corresponding path program 2 times [2022-07-14 13:03:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:29,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154473090] [2022-07-14 13:03:29,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:03:29,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:29,198 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) [2022-07-14 13:03:29,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 13:03:29,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:03:29,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 13:03:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:30,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154473090] [2022-07-14 13:03:30,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154473090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:30,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:30,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-14 13:03:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21835883] [2022-07-14 13:03:30,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 13:03:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 13:03:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-14 13:03:30,090 INFO L87 Difference]: Start difference. First operand 1413 states and 1682 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:30,629 INFO L93 Difference]: Finished difference Result 1440 states and 1716 transitions. [2022-07-14 13:03:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 13:03:30,630 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 [2022-07-14 13:03:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:30,647 INFO L225 Difference]: With dead ends: 1440 [2022-07-14 13:03:30,648 INFO L226 Difference]: Without dead ends: 1434 [2022-07-14 13:03:30,648 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 [2022-07-14 13:03:30,649 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 95 mSDsluCounter, 10571 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 11754 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:30,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 11754 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 13:03:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-07-14 13:03:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1422. [2022-07-14 13:03:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 883 states have (on average 1.870894677236693) internal successors, (1652), 1395 states have internal predecessors, (1652), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:03:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1694 transitions. [2022-07-14 13:03:30,673 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1694 transitions. Word has length 92 [2022-07-14 13:03:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:30,673 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1694 transitions. [2022-07-14 13:03:30,673 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) [2022-07-14 13:03:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1694 transitions. [2022-07-14 13:03:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-14 13:03:30,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:30,674 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] [2022-07-14 13:03:30,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:30,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:30,885 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1774326244, now seen corresponding path program 3 times [2022-07-14 13:03:30,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:30,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327801455] [2022-07-14 13:03:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:03:30,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:30,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:30,888 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) [2022-07-14 13:03:30,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 13:03:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 13:03:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 13:03:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:31,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:32,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327801455] [2022-07-14 13:03:32,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327801455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:32,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:32,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-14 13:03:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946483378] [2022-07-14 13:03:32,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 13:03:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 13:03:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-07-14 13:03:32,419 INFO L87 Difference]: Start difference. First operand 1422 states and 1694 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:34,983 INFO L93 Difference]: Finished difference Result 1476 states and 1768 transitions. [2022-07-14 13:03:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 13:03:34,984 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 [2022-07-14 13:03:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:34,986 INFO L225 Difference]: With dead ends: 1476 [2022-07-14 13:03:34,986 INFO L226 Difference]: Without dead ends: 1467 [2022-07-14 13:03:34,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 13:03:34,987 INFO L413 NwaCegarLoop]: 1195 mSDtfsCounter, 241 mSDsluCounter, 15439 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 16634 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:34,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 16634 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 13:03:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-07-14 13:03:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1440. [2022-07-14 13:03:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 901 states have (on average 1.8590455049944505) internal successors, (1675), 1413 states have internal predecessors, (1675), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:03:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1717 transitions. [2022-07-14 13:03:34,997 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1717 transitions. Word has length 98 [2022-07-14 13:03:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:34,997 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1717 transitions. [2022-07-14 13:03:34,997 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) [2022-07-14 13:03:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1717 transitions. [2022-07-14 13:03:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-14 13:03:34,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:34,998 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] [2022-07-14 13:03:35,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:35,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:35,211 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash -824268388, now seen corresponding path program 4 times [2022-07-14 13:03:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:35,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546545027] [2022-07-14 13:03:35,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 13:03:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:35,213 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) [2022-07-14 13:03:35,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 13:03:35,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 13:03:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 13:03:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:36,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:03:37,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:37,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546545027] [2022-07-14 13:03:37,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546545027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:03:37,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:03:37,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-14 13:03:37,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888110148] [2022-07-14 13:03:37,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:03:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 13:03:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:03:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 13:03:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 13:03:37,535 INFO L87 Difference]: Start difference. First operand 1440 states and 1717 transitions. Second operand has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 52 states have internal predecessors, (132), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 13:03:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:03:44,872 INFO L93 Difference]: Finished difference Result 1543 states and 1852 transitions. [2022-07-14 13:03:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-14 13:03:44,872 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 [2022-07-14 13:03:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:03:44,874 INFO L225 Difference]: With dead ends: 1543 [2022-07-14 13:03:44,874 INFO L226 Difference]: Without dead ends: 1537 [2022-07-14 13:03:44,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4121, Invalid=9921, Unknown=0, NotChecked=0, Total=14042 [2022-07-14 13:03:44,878 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 540 mSDsluCounter, 29073 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 30290 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:03:44,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 30290 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-14 13:03:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-07-14 13:03:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1474. [2022-07-14 13:03:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 935 states have (on average 1.8406417112299465) internal successors, (1721), 1447 states have internal predecessors, (1721), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:03:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1763 transitions. [2022-07-14 13:03:44,890 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1763 transitions. Word has length 110 [2022-07-14 13:03:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:03:44,891 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1763 transitions. [2022-07-14 13:03:44,891 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) [2022-07-14 13:03:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1763 transitions. [2022-07-14 13:03:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 13:03:44,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:03:44,892 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] [2022-07-14 13:03:44,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 13:03:45,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:03:45,105 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:03:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:03:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349148, now seen corresponding path program 5 times [2022-07-14 13:03:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:03:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549028735] [2022-07-14 13:03:45,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:03:45,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:03:45,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:03:45,108 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) [2022-07-14 13:03:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 13:03:46,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:03:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:03:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 13:03:46,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:03:46,418 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 [2022-07-14 13:03:46,510 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:03:46,510 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 [2022-07-14 13:03:46,526 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 [2022-07-14 13:03:46,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-14 13:03:47,946 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:03:47,947 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 [2022-07-14 13:03:47,968 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 [2022-07-14 13:03:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-14 13:03:47,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:03:48,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:03:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549028735] [2022-07-14 13:03:48,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549028735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:03:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171482631] [2022-07-14 13:03:48,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:03:48,205 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:03:48,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:03:48,208 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) [2022-07-14 13:03:48,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 13:05:13,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:05:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:05:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-14 13:05:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:05:13,569 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 [2022-07-14 13:05:13,690 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:05:13,691 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 [2022-07-14 13:05:13,700 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 [2022-07-14 13:05:13,755 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 [2022-07-14 13:05:15,253 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:05:15,253 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 [2022-07-14 13:05:15,282 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 [2022-07-14 13:05:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-07-14 13:05:15,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:05:15,487 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3142 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3142) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))) is different from false [2022-07-14 13:05:15,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [171482631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:05:15,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:05:15,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-07-14 13:05:15,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047323124] [2022-07-14 13:05:15,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:05:15,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 13:05:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:05:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 13:05:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=215, Unknown=18, NotChecked=30, Total=306 [2022-07-14 13:05:15,489 INFO L87 Difference]: Start difference. First operand 1474 states and 1763 transitions. Second operand has 14 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:05:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:05:21,360 INFO L93 Difference]: Finished difference Result 2790 states and 3320 transitions. [2022-07-14 13:05:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 13:05:21,361 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 [2022-07-14 13:05:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:05:21,365 INFO L225 Difference]: With dead ends: 2790 [2022-07-14 13:05:21,365 INFO L226 Difference]: Without dead ends: 2790 [2022-07-14 13:05:21,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 165 SyntacticMatches, 90 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=97, Invalid=480, Unknown=27, NotChecked=46, Total=650 [2022-07-14 13:05:21,366 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 1973 mSDsluCounter, 7662 mSDsCounter, 0 mSdLazyCounter, 5662 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 8568 SdHoareTripleChecker+Invalid, 9799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4102 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:05:21,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1978 Valid, 8568 Invalid, 9799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5662 Invalid, 0 Unknown, 4102 Unchecked, 5.6s Time] [2022-07-14 13:05:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2022-07-14 13:05:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1471. [2022-07-14 13:05:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 935 states have (on average 1.8374331550802139) internal successors, (1718), 1444 states have internal predecessors, (1718), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-14 13:05:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1760 transitions. [2022-07-14 13:05:21,379 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1760 transitions. Word has length 132 [2022-07-14 13:05:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:05:21,379 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1760 transitions. [2022-07-14 13:05:21,379 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) [2022-07-14 13:05:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1760 transitions. [2022-07-14 13:05:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 13:05:21,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:05:21,380 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] [2022-07-14 13:05:21,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-07-14 13:05:21,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 13:05:21,781 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 [2022-07-14 13:05:21,781 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_mallocErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alt_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 631 more)] === [2022-07-14 13:05:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:05:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1958349149, now seen corresponding path program 1 times [2022-07-14 13:05:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:05:21,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212923625] [2022-07-14 13:05:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:05:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:05:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:05:21,783 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) [2022-07-14 13:05:21,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 13:05:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:05:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-14 13:05:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:05:22,720 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 [2022-07-14 13:05:22,896 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 [2022-07-14 13:05:22,924 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:05:22,924 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 [2022-07-14 13:05:22,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 13:05:22,947 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 [2022-07-14 13:05:23,042 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 [2022-07-14 13:05:23,044 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 [2022-07-14 13:05:24,303 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 [2022-07-14 13:05:24,331 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:05:24,332 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 [2022-07-14 13:05:24,335 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 [2022-07-14 13:05:24,373 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 [2022-07-14 13:05:24,377 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 [2022-07-14 13:05:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2022-07-14 13:05:24,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:05:25,145 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 [2022-07-14 13:05:25,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:05:25,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212923625] [2022-07-14 13:05:25,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212923625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:05:25,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031194598] [2022-07-14 13:05:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:05:25,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:05:25,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:05:25,151 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) [2022-07-14 13:05:25,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process