./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.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_OAT_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:12:58,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:12:58,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:12:58,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:12:58,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:12:58,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:12:58,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:12:58,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:12:58,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:12:58,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:12:58,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:12:58,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:12:58,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:12:58,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:12:58,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:12:58,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:12:58,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:12:58,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:12:58,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:12:58,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:12:58,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:12:58,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:12:58,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:12:58,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:12:58,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:12:58,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:12:58,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:12:58,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:12:58,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:12:58,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:12:58,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:12:58,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:12:58,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:12:58,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:12:58,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:12:58,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:12:58,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:12:58,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:12:58,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:12:58,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:12:58,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:12:58,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:12:58,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 13:12:58,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:12:58,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:12:58,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:12:58,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:12:58,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:12:58,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:12:58,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:12:58,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:12:58,472 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:12:58,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:12:58,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:12:58,473 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:12:58,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:12:58,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:12:58,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:12:58,474 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:12:58,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:12:58,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:12:58,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:12:58,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:12:58,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:12:58,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:12:58,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:12:58,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:12:58,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:12:58,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:12:58,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:12:58,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:12:58,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 13:12:58,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 13:12:58,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2022-07-14 13:12:58,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:12:58,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:12:58,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:12:58,741 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:12:58,741 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:12:58,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2022-07-14 13:12:58,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f32eb5d/e979dea55c064e8580c8d97f661d2d2b/FLAG073a4fce0 [2022-07-14 13:12:59,337 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:12:59,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2022-07-14 13:12:59,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f32eb5d/e979dea55c064e8580c8d97f661d2d2b/FLAG073a4fce0 [2022-07-14 13:12:59,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f32eb5d/e979dea55c064e8580c8d97f661d2d2b [2022-07-14 13:12:59,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:12:59,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:12:59,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:12:59,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:12:59,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:12:59,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:12:59" (1/1) ... [2022-07-14 13:12:59,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a96057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:12:59, skipping insertion in model container [2022-07-14 13:12:59,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:12:59" (1/1) ... [2022-07-14 13:12:59,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:12:59,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:13:00,085 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_OAT_test10-1.i[33022,33035] [2022-07-14 13:13:00,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:13:00,282 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 13:13:00,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d8fd89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:00, skipping insertion in model container [2022-07-14 13:13:00,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:13:00,284 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 13:13:00,285 INFO L158 Benchmark]: Toolchain (without parser) took 676.72ms. Allocated memory is still 94.4MB. Free memory was 57.2MB in the beginning and 51.9MB in the end (delta: 5.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-14 13:13:00,286 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 65.2MB in the beginning and 65.2MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 13:13:00,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.37ms. Allocated memory is still 94.4MB. Free memory was 56.9MB in the beginning and 51.9MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 13:13:00,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 65.2MB in the beginning and 65.2MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.37ms. Allocated memory is still 94.4MB. Free memory was 56.9MB in the beginning and 51.9MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_OAT_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:13:02,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:13:02,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:13:02,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:13:02,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:13:02,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:13:02,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:13:02,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:13:02,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:13:02,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:13:02,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:13:02,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:13:02,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:13:02,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:13:02,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:13:02,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:13:02,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:13:02,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:13:02,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:13:02,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:13:02,180 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:13:02,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:13:02,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:13:02,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:13:02,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:13:02,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:13:02,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:13:02,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:13:02,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:13:02,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:13:02,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:13:02,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:13:02,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:13:02,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:13:02,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:13:02,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:13:02,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:13:02,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:13:02,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:13:02,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:13:02,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:13:02,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:13:02,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 13:13:02,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:13:02,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:13:02,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:13:02,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:13:02,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:13:02,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:13:02,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:13:02,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:13:02,251 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:13:02,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:13:02,252 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 13:13:02,253 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:13:02,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:13:02,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 13:13:02,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:13:02,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 13:13:02,259 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 13:13:02,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 13:13:02,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:13:02,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 13:13:02,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 13:13:02,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 13:13:02,260 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 13:13:02,260 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:13:02,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:13:02,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:13:02,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:13:02,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:13:02,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:13:02,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:13:02,262 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 13:13:02,262 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 13:13:02,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 13:13:02,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2022-07-14 13:13:02,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:13:02,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:13:02,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:13:02,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:13:02,647 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:13:02,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2022-07-14 13:13:02,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4c9b716/c229fce4cd3f432ea8d85f6bcb9012da/FLAG6794068f8 [2022-07-14 13:13:03,403 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:13:03,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2022-07-14 13:13:03,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4c9b716/c229fce4cd3f432ea8d85f6bcb9012da/FLAG6794068f8 [2022-07-14 13:13:03,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4c9b716/c229fce4cd3f432ea8d85f6bcb9012da [2022-07-14 13:13:03,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:13:03,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:13:03,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:13:03,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:13:03,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:13:03,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:13:03" (1/1) ... [2022-07-14 13:13:03,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67fa7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:03, skipping insertion in model container [2022-07-14 13:13:03,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:13:03" (1/1) ... [2022-07-14 13:13:03,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:13:03,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:13:04,243 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_OAT_test10-1.i[33022,33035] [2022-07-14 13:13:04,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:13:04,449 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 13:13:04,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:13:04,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2022-07-14 13:13:04,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:13:04,571 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 13:13:04,598 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_OAT_test10-1.i[33022,33035] [2022-07-14 13:13:04,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:13:04,780 INFO L208 MainTranslator]: Completed translation [2022-07-14 13:13:04,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04 WrapperNode [2022-07-14 13:13:04,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:13:04,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 13:13:04,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 13:13:04,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 13:13:04,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:04,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:04,979 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2022-07-14 13:13:04,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 13:13:04,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 13:13:04,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 13:13:04,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 13:13:04,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:04,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 13:13:05,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 13:13:05,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 13:13:05,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 13:13:05,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (1/1) ... [2022-07-14 13:13:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:13:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:13:05,217 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 13:13:05,239 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 13:13:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 13:13:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-14 13:13:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-14 13:13:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 13:13:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-14 13:13:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-14 13:13:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-14 13:13:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 13:13:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 13:13:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 13:13:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 13:13:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 13:13:05,658 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 13:13:05,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 13:13:05,664 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-14 13:13:13,499 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 13:13:13,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 13:13:13,531 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2022-07-14 13:13:13,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:13:13 BoogieIcfgContainer [2022-07-14 13:13:13,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 13:13:13,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 13:13:13,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 13:13:13,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 13:13:13,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 01:13:03" (1/3) ... [2022-07-14 13:13:13,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1595ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:13:13, skipping insertion in model container [2022-07-14 13:13:13,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:13:04" (2/3) ... [2022-07-14 13:13:13,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1595ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:13:13, skipping insertion in model container [2022-07-14 13:13:13,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:13:13" (3/3) ... [2022-07-14 13:13:13,561 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-1.i [2022-07-14 13:13:13,575 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 13:13:13,576 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2022-07-14 13:13:13,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 13:13:13,664 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@4730bed2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47570ccb [2022-07-14 13:13:13,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2022-07-14 13:13:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 13:13:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:13:13,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:13,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:13:13,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-14 13:13:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:13,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530924979] [2022-07-14 13:13:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:13,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:13,704 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 13:13:13,705 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 13:13:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:13:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:13,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 13:13:14,003 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 13:13:14,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:14,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:14,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530924979] [2022-07-14 13:13:14,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530924979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:14,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:14,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:13:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621165069] [2022-07-14 13:13:14,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:14,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:14,040 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:13:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:17,432 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2022-07-14 13:13:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:17,435 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 13:13:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:17,458 INFO L225 Difference]: With dead ends: 2558 [2022-07-14 13:13:17,458 INFO L226 Difference]: Without dead ends: 2556 [2022-07-14 13:13:17,460 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 13:13:17,463 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:17,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-14 13:13:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-07-14 13:13:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2022-07-14 13:13:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-14 13:13:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2022-07-14 13:13:17,577 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2022-07-14 13:13:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:17,577 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2022-07-14 13:13:17,578 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 13:13:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2022-07-14 13:13:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 13:13:17,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:17,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 13:13:17,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 13:13:17,783 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 13:13:17,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-14 13:13:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180996824] [2022-07-14 13:13:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:17,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:17,787 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 13:13:17,802 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 13:13:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:13:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:17,971 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 13:13:17,983 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 13:13:17,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:17,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180996824] [2022-07-14 13:13:17,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180996824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:17,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:17,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:13:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740969352] [2022-07-14 13:13:17,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:17,999 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 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 13:13:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:22,314 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2022-07-14 13:13:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:22,315 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 13:13:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:22,325 INFO L225 Difference]: With dead ends: 2973 [2022-07-14 13:13:22,325 INFO L226 Difference]: Without dead ends: 2973 [2022-07-14 13:13:22,326 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 13:13:22,326 INFO L413 NwaCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:22,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-14 13:13:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-07-14 13:13:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2022-07-14 13:13:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-14 13:13:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2022-07-14 13:13:22,393 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2022-07-14 13:13:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:22,393 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2022-07-14 13:13:22,394 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 13:13:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2022-07-14 13:13:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 13:13:22,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:22,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:13:22,407 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 13:13:22,605 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 13:13:22,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:22,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-14 13:13:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244310556] [2022-07-14 13:13:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:22,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:13:22,616 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 13:13:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:13:22,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:22,833 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 13:13:22,839 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 13:13:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:13:22,894 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 13:13:22,903 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:13:22,903 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 13:13:22,922 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 13:13:22,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:22,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244310556] [2022-07-14 13:13:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244310556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:22,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502483428] [2022-07-14 13:13:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:22,926 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 13:13:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:29,465 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2022-07-14 13:13:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-07-14 13:13:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:29,499 INFO L225 Difference]: With dead ends: 4906 [2022-07-14 13:13:29,499 INFO L226 Difference]: Without dead ends: 4906 [2022-07-14 13:13:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 13:13:29,502 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:29,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-07-14 13:13:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2022-07-14 13:13:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2022-07-14 13:13:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2022-07-14 13:13:29,586 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2022-07-14 13:13:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:29,586 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2022-07-14 13:13:29,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 13:13:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2022-07-14 13:13:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:13:29,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:29,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:13:29,607 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 13:13:29,800 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 13:13:29,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-14 13:13:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:29,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577658880] [2022-07-14 13:13:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:29,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:29,803 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 13:13:29,805 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 13:13:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:13:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:29,951 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 13:13:29,967 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 13:13:29,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:29,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577658880] [2022-07-14 13:13:29,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577658880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:29,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:29,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:13:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253847001] [2022-07-14 13:13:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:29,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:29,970 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:32,761 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2022-07-14 13:13:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:32,780 INFO L225 Difference]: With dead ends: 4574 [2022-07-14 13:13:32,781 INFO L226 Difference]: Without dead ends: 4574 [2022-07-14 13:13:32,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:13:32,782 INFO L413 NwaCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:32,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-14 13:13:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2022-07-14 13:13:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2022-07-14 13:13:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2022-07-14 13:13:32,862 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2022-07-14 13:13:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:32,862 INFO L495 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2022-07-14 13:13:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2022-07-14 13:13:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:13:32,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:32,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:13:32,876 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 13:13:33,076 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 13:13:33,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-14 13:13:33,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:33,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618214783] [2022-07-14 13:13:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:33,080 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 13:13:33,082 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 13:13:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:13:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:33,250 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 13:13:33,272 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 13:13:33,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:33,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618214783] [2022-07-14 13:13:33,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618214783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:33,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:33,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:13:33,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373889707] [2022-07-14 13:13:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:33,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:33,275 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:37,142 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2022-07-14 13:13:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:37,157 INFO L225 Difference]: With dead ends: 4996 [2022-07-14 13:13:37,157 INFO L226 Difference]: Without dead ends: 4996 [2022-07-14 13:13:37,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:13:37,158 INFO L413 NwaCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:37,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-14 13:13:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2022-07-14 13:13:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2022-07-14 13:13:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2022-07-14 13:13:37,228 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2022-07-14 13:13:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:37,229 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2022-07-14 13:13:37,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 13:13:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2022-07-14 13:13:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 13:13:37,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:37,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:13:37,239 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 13:13:37,439 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 13:13:37,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-14 13:13:37,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940996102] [2022-07-14 13:13:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:37,442 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 13:13:37,443 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 13:13:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 13:13:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:37,603 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 13:13:37,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:37,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940996102] [2022-07-14 13:13:37,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940996102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:37,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:37,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623906403] [2022-07-14 13:13:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:37,607 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 13:13:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:37,647 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2022-07-14 13:13:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 13:13:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:37,668 INFO L225 Difference]: With dead ends: 3541 [2022-07-14 13:13:37,668 INFO L226 Difference]: Without dead ends: 3541 [2022-07-14 13:13:37,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 13:13:37,670 INFO L413 NwaCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 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 13:13:37,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2022-07-14 13:13:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2022-07-14 13:13:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2022-07-14 13:13:37,735 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2022-07-14 13:13:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:37,735 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2022-07-14 13:13:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 13:13:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2022-07-14 13:13:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 13:13:37,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:37,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:13:37,753 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 13:13:37,945 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 13:13:37,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-14 13:13:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:37,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146688591] [2022-07-14 13:13:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:37,948 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 13:13:37,950 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 13:13:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:13:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:38,109 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 13:13:38,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:38,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146688591] [2022-07-14 13:13:38,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146688591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:38,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:38,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:13:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99361064] [2022-07-14 13:13:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:38,113 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13:13:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:38,201 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2022-07-14 13:13:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:38,202 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), 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 13 [2022-07-14 13:13:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:38,220 INFO L225 Difference]: With dead ends: 3513 [2022-07-14 13:13:38,221 INFO L226 Difference]: Without dead ends: 3513 [2022-07-14 13:13:38,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:13:38,222 INFO L413 NwaCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 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 13:13:38,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-07-14 13:13:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-07-14 13:13:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2022-07-14 13:13:38,293 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2022-07-14 13:13:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:38,294 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2022-07-14 13:13:38,294 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), 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 13:13:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2022-07-14 13:13:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 13:13:38,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:38,296 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] [2022-07-14 13:13:38,309 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 13:13:38,504 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 13:13:38,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-14 13:13:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:38,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345734334] [2022-07-14 13:13:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:38,507 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 13:13:38,508 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 13:13:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:38,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 13:13:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:38,710 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 13:13:38,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:38,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:38,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345734334] [2022-07-14 13:13:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345734334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:38,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:38,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946869115] [2022-07-14 13:13:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:38,713 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:13:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:38,761 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2022-07-14 13:13:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-07-14 13:13:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:38,773 INFO L225 Difference]: With dead ends: 4760 [2022-07-14 13:13:38,773 INFO L226 Difference]: Without dead ends: 4760 [2022-07-14 13:13:38,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 13:13:38,774 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 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 13:13:38,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-07-14 13:13:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2022-07-14 13:13:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2022-07-14 13:13:38,863 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2022-07-14 13:13:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:38,864 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2022-07-14 13:13:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:13:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2022-07-14 13:13:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 13:13:38,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:38,866 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] [2022-07-14 13:13:38,880 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 13:13:39,076 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 13:13:39,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-14 13:13:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495423134] [2022-07-14 13:13:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:39,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:39,082 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 13:13:39,084 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 13:13:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 13:13:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:39,295 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 13:13:39,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:39,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495423134] [2022-07-14 13:13:39,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495423134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:39,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:39,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013579758] [2022-07-14 13:13:39,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:39,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:13:39,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:13:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:13:39,298 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:13:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:39,348 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2022-07-14 13:13:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:13:39,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-07-14 13:13:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:39,359 INFO L225 Difference]: With dead ends: 4593 [2022-07-14 13:13:39,360 INFO L226 Difference]: Without dead ends: 4593 [2022-07-14 13:13:39,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 13:13:39,362 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 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 13:13:39,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-07-14 13:13:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2022-07-14 13:13:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2022-07-14 13:13:39,422 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2022-07-14 13:13:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:39,422 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2022-07-14 13:13:39,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:13:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2022-07-14 13:13:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 13:13:39,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:39,425 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] [2022-07-14 13:13:39,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-14 13:13:39,635 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 13:13:39,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-14 13:13:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:39,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811754775] [2022-07-14 13:13:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:39,638 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 13:13:39,640 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 13:13:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:13:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:39,834 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 13:13:39,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:39,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811754775] [2022-07-14 13:13:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811754775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:39,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:13:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86565569] [2022-07-14 13:13:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:39,835 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 13:13:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:39,933 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2022-07-14 13:13:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:39,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2022-07-14 13:13:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:39,943 INFO L225 Difference]: With dead ends: 4558 [2022-07-14 13:13:39,944 INFO L226 Difference]: Without dead ends: 4558 [2022-07-14 13:13:39,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 13:13:39,945 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 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 13:13:39,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-14 13:13:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2022-07-14 13:13:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2022-07-14 13:13:40,016 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2022-07-14 13:13:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2022-07-14 13:13:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 13:13:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2022-07-14 13:13:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 13:13:40,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:40,020 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] [2022-07-14 13:13:40,039 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 13:13:40,233 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 13:13:40,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-14 13:13:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:40,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477214065] [2022-07-14 13:13:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:40,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:40,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:40,237 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 13:13:40,239 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 13:13:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:13:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:40,464 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 13:13:40,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:40,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477214065] [2022-07-14 13:13:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477214065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:40,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:13:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516920931] [2022-07-14 13:13:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:40,466 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 13:13:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:40,551 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2022-07-14 13:13:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2022-07-14 13:13:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:40,561 INFO L225 Difference]: With dead ends: 4485 [2022-07-14 13:13:40,562 INFO L226 Difference]: Without dead ends: 4485 [2022-07-14 13:13:40,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 13:13:40,562 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 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 13:13:40,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:13:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-07-14 13:13:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2022-07-14 13:13:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2022-07-14 13:13:40,622 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2022-07-14 13:13:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:40,624 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2022-07-14 13:13:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 13:13:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2022-07-14 13:13:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 13:13:40,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:40,627 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] [2022-07-14 13:13:40,642 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 13:13:40,837 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 13:13:40,838 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-14 13:13:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633820460] [2022-07-14 13:13:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:40,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:40,840 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 13:13:40,842 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 13:13:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:41,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:13:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:41,031 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 13:13:41,075 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 13:13:41,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:41,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:41,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633820460] [2022-07-14 13:13:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633820460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:41,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:41,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345654826] [2022-07-14 13:13:41,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:41,077 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 13:13:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:43,560 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2022-07-14 13:13:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2022-07-14 13:13:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:43,568 INFO L225 Difference]: With dead ends: 3502 [2022-07-14 13:13:43,568 INFO L226 Difference]: Without dead ends: 3502 [2022-07-14 13:13:43,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 13:13:43,569 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:43,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-14 13:13:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-07-14 13:13:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2022-07-14 13:13:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2022-07-14 13:13:43,618 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2022-07-14 13:13:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:43,618 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2022-07-14 13:13:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 13:13:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2022-07-14 13:13:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 13:13:43,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:43,619 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] [2022-07-14 13:13:43,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-14 13:13:43,827 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 13:13:43,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-14 13:13:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:43,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646452033] [2022-07-14 13:13:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:43,831 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 13:13:43,834 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 13:13:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:13:44,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:44,032 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 13:13:44,161 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 13:13:44,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:44,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:44,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646452033] [2022-07-14 13:13:44,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646452033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:44,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:44,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240359326] [2022-07-14 13:13:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:44,163 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 13:13:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:48,143 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2022-07-14 13:13:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:13:48,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2022-07-14 13:13:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:48,153 INFO L225 Difference]: With dead ends: 3925 [2022-07-14 13:13:48,153 INFO L226 Difference]: Without dead ends: 3925 [2022-07-14 13:13:48,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 13:13:48,154 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:48,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-14 13:13:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2022-07-14 13:13:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2022-07-14 13:13:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2022-07-14 13:13:48,205 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2022-07-14 13:13:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:48,206 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2022-07-14 13:13:48,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 13:13:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2022-07-14 13:13:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 13:13:48,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:48,207 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] [2022-07-14 13:13:48,216 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 13:13:48,416 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 13:13:48,417 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-14 13:13:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219002277] [2022-07-14 13:13:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:48,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:48,420 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 13:13:48,422 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 13:13:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:13:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:48,656 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 13:13:48,728 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 13:13:48,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:48,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:48,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219002277] [2022-07-14 13:13:48,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219002277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:48,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:48,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949721977] [2022-07-14 13:13:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:48,730 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:13:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:53,024 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2022-07-14 13:13:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-07-14 13:13:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:53,036 INFO L225 Difference]: With dead ends: 6304 [2022-07-14 13:13:53,036 INFO L226 Difference]: Without dead ends: 6304 [2022-07-14 13:13:53,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 13:13:53,037 INFO L413 NwaCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:53,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-14 13:13:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-07-14 13:13:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2022-07-14 13:13:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2022-07-14 13:13:53,096 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2022-07-14 13:13:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:53,096 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2022-07-14 13:13:53,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:13:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2022-07-14 13:13:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 13:13:53,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:53,097 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] [2022-07-14 13:13:53,115 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 13:13:53,308 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 13:13:53,308 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-14 13:13:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:53,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40425311] [2022-07-14 13:13:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:53,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:53,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:53,311 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 13:13:53,313 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 13:13:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:13:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:53,550 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 13:13:53,709 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 13:13:53,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:53,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40425311] [2022-07-14 13:13:53,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40425311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:53,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:53,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645376323] [2022-07-14 13:13:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:53,711 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:13:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:13:59,319 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2022-07-14 13:13:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:13:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-07-14 13:13:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:13:59,327 INFO L225 Difference]: With dead ends: 5973 [2022-07-14 13:13:59,327 INFO L226 Difference]: Without dead ends: 5973 [2022-07-14 13:13:59,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 13:13:59,328 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:13:59,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-14 13:13:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2022-07-14 13:13:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2022-07-14 13:13:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2498 states have (on average 1.8254603682946358) internal successors, (4560), 3226 states have internal predecessors, (4560), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:13:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2022-07-14 13:13:59,387 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2022-07-14 13:13:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:13:59,388 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2022-07-14 13:13:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:13:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2022-07-14 13:13:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 13:13:59,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:13:59,389 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] [2022-07-14 13:13:59,399 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 13:13:59,599 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 13:13:59,599 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:13:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:13:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-14 13:13:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:13:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645042890] [2022-07-14 13:13:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:13:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:13:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:13:59,601 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 13:13:59,603 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 13:13:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:13:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:13:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:13:59,814 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 13:13:59,872 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 13:13:59,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:13:59,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:13:59,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645042890] [2022-07-14 13:13:59,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645042890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:13:59,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:13:59,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:13:59,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181662921] [2022-07-14 13:13:59,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:13:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:13:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:13:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:13:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:13:59,877 INFO L87 Difference]: Start difference. First operand 3251 states and 4610 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:14:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:04,287 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2022-07-14 13:14:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:14:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-07-14 13:14:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:04,297 INFO L225 Difference]: With dead ends: 6748 [2022-07-14 13:14:04,297 INFO L226 Difference]: Without dead ends: 6748 [2022-07-14 13:14:04,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 13:14:04,298 INFO L413 NwaCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:04,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-14 13:14:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2022-07-14 13:14:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2022-07-14 13:14:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8166533226581265) internal successors, (4538), 3223 states have internal predecessors, (4538), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:14:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2022-07-14 13:14:04,364 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2022-07-14 13:14:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:04,364 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2022-07-14 13:14:04,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:14:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2022-07-14 13:14:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 13:14:04,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:04,366 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] [2022-07-14 13:14:04,380 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 13:14:04,575 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 13:14:04,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-14 13:14:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:04,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8037705] [2022-07-14 13:14:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:04,579 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 13:14:04,582 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 13:14:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:14:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:04,795 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 13:14:04,930 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 13:14:04,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:04,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:04,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8037705] [2022-07-14 13:14:04,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8037705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:04,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:04,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:14:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091957376] [2022-07-14 13:14:04,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:04,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:04,931 INFO L87 Difference]: Start difference. First operand 3248 states and 4588 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:14:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:09,635 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2022-07-14 13:14:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-07-14 13:14:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:09,641 INFO L225 Difference]: With dead ends: 4807 [2022-07-14 13:14:09,641 INFO L226 Difference]: Without dead ends: 4807 [2022-07-14 13:14:09,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 13:14:09,641 INFO L413 NwaCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:09,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-14 13:14:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-07-14 13:14:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2022-07-14 13:14:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8134507606084869) internal successors, (4530), 3223 states have internal predecessors, (4530), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:14:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2022-07-14 13:14:09,693 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2022-07-14 13:14:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:09,693 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2022-07-14 13:14:09,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:14:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2022-07-14 13:14:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 13:14:09,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:09,694 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] [2022-07-14 13:14:09,705 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 13:14:09,904 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 13:14:09,905 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-14 13:14:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:09,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141357982] [2022-07-14 13:14:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:09,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:09,908 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 13:14:09,910 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 13:14:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:14:10,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:10,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:10,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141357982] [2022-07-14 13:14:10,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141357982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:10,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:10,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797941916] [2022-07-14 13:14:10,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:10,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:10,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:10,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:10,137 INFO L87 Difference]: Start difference. First operand 3248 states and 4580 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 13:14:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:10,195 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2022-07-14 13:14:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 40 [2022-07-14 13:14:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:10,200 INFO L225 Difference]: With dead ends: 3236 [2022-07-14 13:14:10,200 INFO L226 Difference]: Without dead ends: 3236 [2022-07-14 13:14:10,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 13:14:10,201 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 756 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4622 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 13:14:10,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 4622 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:14:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-07-14 13:14:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2022-07-14 13:14:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2486 states have (on average 1.8125502815768302) internal successors, (4506), 3211 states have internal predecessors, (4506), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-14 13:14:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2022-07-14 13:14:10,254 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2022-07-14 13:14:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:10,254 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2022-07-14 13:14:10,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 13:14:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2022-07-14 13:14:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 13:14:10,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:10,255 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] [2022-07-14 13:14:10,268 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 13:14:10,465 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 13:14:10,466 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-14 13:14:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:10,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148299584] [2022-07-14 13:14:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:10,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:10,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:10,469 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 13:14:10,510 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 13:14:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:10,856 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 13:14:10,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:10,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148299584] [2022-07-14 13:14:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148299584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:10,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:14:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462103943] [2022-07-14 13:14:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:14:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:14:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:14:10,858 INFO L87 Difference]: Start difference. First operand 3236 states and 4556 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 13:14:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:11,022 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2022-07-14 13:14:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:14:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-07-14 13:14:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:11,030 INFO L225 Difference]: With dead ends: 4684 [2022-07-14 13:14:11,031 INFO L226 Difference]: Without dead ends: 4684 [2022-07-14 13:14:11,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 13:14:11,032 INFO L413 NwaCegarLoop]: 1820 mSDtfsCounter, 1180 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:11,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 3502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:14:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-07-14 13:14:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2022-07-14 13:14:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3266 states have (on average 1.7988364972443356) internal successors, (5875), 3988 states have internal predecessors, (5875), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-14 13:14:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2022-07-14 13:14:11,097 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2022-07-14 13:14:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:11,097 INFO L495 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2022-07-14 13:14:11,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 13:14:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2022-07-14 13:14:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 13:14:11,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:11,099 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] [2022-07-14 13:14:11,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:11,308 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 13:14:11,308 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:11,309 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-14 13:14:11,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161139425] [2022-07-14 13:14:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:11,312 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 13:14:11,315 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 13:14:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:11,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:11,622 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 13:14:11,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:11,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:11,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161139425] [2022-07-14 13:14:11,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161139425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:11,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:11,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022198442] [2022-07-14 13:14:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:11,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:11,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:11,624 INFO L87 Difference]: Start difference. First operand 4020 states and 5939 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 13:14:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:11,694 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2022-07-14 13:14:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-07-14 13:14:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:11,702 INFO L225 Difference]: With dead ends: 4959 [2022-07-14 13:14:11,702 INFO L226 Difference]: Without dead ends: 4959 [2022-07-14 13:14:11,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 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 13:14:11,703 INFO L413 NwaCegarLoop]: 2867 mSDtfsCounter, 1755 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 6826 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 13:14:11,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 6826 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:14:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-07-14 13:14:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2022-07-14 13:14:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3224 states have (on average 1.8005583126550868) internal successors, (5805), 3946 states have internal predecessors, (5805), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-14 13:14:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2022-07-14 13:14:11,790 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2022-07-14 13:14:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:11,791 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2022-07-14 13:14:11,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 13:14:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2022-07-14 13:14:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 13:14:11,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:11,792 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 13:14:11,804 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 13:14:12,003 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 13:14:12,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-14 13:14:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:12,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062332534] [2022-07-14 13:14:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:12,007 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 13:14:12,008 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 13:14:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:12,310 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 13:14:12,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:12,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:12,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062332534] [2022-07-14 13:14:12,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062332534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:12,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:12,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460914858] [2022-07-14 13:14:12,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:12,312 INFO L87 Difference]: Start difference. First operand 3978 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:14:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:12,383 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2022-07-14 13:14:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-07-14 13:14:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:12,390 INFO L225 Difference]: With dead ends: 4695 [2022-07-14 13:14:12,391 INFO L226 Difference]: Without dead ends: 4695 [2022-07-14 13:14:12,391 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 13:14:12,392 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 1746 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 6955 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 13:14:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 6955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:14:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-07-14 13:14:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2022-07-14 13:14:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3206 states have (on average 1.8013100436681222) internal successors, (5775), 3928 states have internal predecessors, (5775), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-14 13:14:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2022-07-14 13:14:12,444 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2022-07-14 13:14:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:12,444 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2022-07-14 13:14:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:14:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2022-07-14 13:14:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 13:14:12,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:12,446 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] [2022-07-14 13:14:12,462 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 13:14:12,658 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 13:14:12,659 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2022-07-14 13:14:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:12,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404487596] [2022-07-14 13:14:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:12,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:12,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:12,661 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 13:14:12,664 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 13:14:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 13:14:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:14:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 13:14:12,980 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-14 13:14:12,980 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 29 treesize of output 36 [2022-07-14 13:14:13,023 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-14 13:14:13,024 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 60 treesize of output 20 [2022-07-14 13:14:13,053 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 13:14:13,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:13,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404487596] [2022-07-14 13:14:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404487596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:13,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:13,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570108274] [2022-07-14 13:14:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:13,056 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 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 13:14:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:14,447 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2022-07-14 13:14:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 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 57 [2022-07-14 13:14:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:14,452 INFO L225 Difference]: With dead ends: 3926 [2022-07-14 13:14:14,452 INFO L226 Difference]: Without dead ends: 3926 [2022-07-14 13:14:14,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:14:14,453 INFO L413 NwaCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 1.3s Time] [2022-07-14 13:14:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-07-14 13:14:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2022-07-14 13:14:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3172 states have (on average 1.8095838587641866) internal successors, (5740), 3894 states have internal predecessors, (5740), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-14 13:14:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2022-07-14 13:14:14,505 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2022-07-14 13:14:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:14,505 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2022-07-14 13:14:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 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 13:14:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2022-07-14 13:14:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 13:14:14,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:14,506 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] [2022-07-14 13:14:14,521 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 13:14:14,718 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 13:14:14,718 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-14 13:14:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142705753] [2022-07-14 13:14:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:14,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:14,720 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 13:14:14,722 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 13:14:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:15,157 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 13:14:15,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:15,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142705753] [2022-07-14 13:14:15,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142705753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:15,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:14:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740866240] [2022-07-14 13:14:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:14:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:14:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:14:15,159 INFO L87 Difference]: Start difference. First operand 3926 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 13:14:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:15,351 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2022-07-14 13:14:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:14:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2022-07-14 13:14:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:15,361 INFO L225 Difference]: With dead ends: 5186 [2022-07-14 13:14:15,361 INFO L226 Difference]: Without dead ends: 5186 [2022-07-14 13:14:15,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 13:14:15,362 INFO L413 NwaCegarLoop]: 1948 mSDtfsCounter, 870 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:15,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 3621 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 13:14:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-07-14 13:14:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2022-07-14 13:14:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4083 states have (on average 1.7891256429096252) internal successors, (7305), 4802 states have internal predecessors, (7305), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2022-07-14 13:14:15,452 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2022-07-14 13:14:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:15,452 INFO L495 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2022-07-14 13:14:15,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 13:14:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2022-07-14 13:14:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 13:14:15,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:15,453 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 13:14:15,474 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 13:14:15,674 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 13:14:15,675 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-14 13:14:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:15,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869512124] [2022-07-14 13:14:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:15,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:15,678 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 13:14:15,680 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 13:14:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 13:14:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:16,074 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 13:14:16,078 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 13:14:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 13:14:16,418 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 13:14:16,429 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:14:16,429 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 11 treesize of output 11 [2022-07-14 13:14:16,438 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 13:14:16,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:16,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:16,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869512124] [2022-07-14 13:14:16,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869512124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:16,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:16,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:14:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824451554] [2022-07-14 13:14:16,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:16,441 INFO L87 Difference]: Start difference. First operand 4843 states and 7387 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 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 13:14:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:20,019 INFO L93 Difference]: Finished difference Result 6874 states and 10400 transitions. [2022-07-14 13:14:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2022-07-14 13:14:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:20,031 INFO L225 Difference]: With dead ends: 6874 [2022-07-14 13:14:20,032 INFO L226 Difference]: Without dead ends: 6874 [2022-07-14 13:14:20,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 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 13:14:20,032 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 4069 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:20,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 1047 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-14 13:14:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2022-07-14 13:14:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 4603. [2022-07-14 13:14:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 3927 states have (on average 1.7122485357779476) internal successors, (6724), 4562 states have internal predecessors, (6724), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6806 transitions. [2022-07-14 13:14:20,103 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6806 transitions. Word has length 62 [2022-07-14 13:14:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:20,103 INFO L495 AbstractCegarLoop]: Abstraction has 4603 states and 6806 transitions. [2022-07-14 13:14:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 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 13:14:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6806 transitions. [2022-07-14 13:14:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 13:14:20,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:20,105 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] [2022-07-14 13:14:20,119 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 13:14:20,319 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 13:14:20,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-14 13:14:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095609365] [2022-07-14 13:14:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:20,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:20,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:20,323 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 13:14:20,358 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 13:14:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 13:14:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:20,712 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 13:14:20,723 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 13:14:20,750 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 13:14:20,758 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 13:14:20,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:20,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095609365] [2022-07-14 13:14:20,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095609365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:20,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:20,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629305223] [2022-07-14 13:14:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:14:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:14:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:14:20,762 INFO L87 Difference]: Start difference. First operand 4603 states and 6806 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:23,902 INFO L93 Difference]: Finished difference Result 4602 states and 6803 transitions. [2022-07-14 13:14:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:14:23,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-14 13:14:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:23,908 INFO L225 Difference]: With dead ends: 4602 [2022-07-14 13:14:23,909 INFO L226 Difference]: Without dead ends: 4602 [2022-07-14 13:14:23,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:14:23,913 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 4 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:23,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4589 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-14 13:14:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-14 13:14:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-14 13:14:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3927 states have (on average 1.711484593837535) internal successors, (6721), 4561 states have internal predecessors, (6721), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6803 transitions. [2022-07-14 13:14:23,983 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6803 transitions. Word has length 67 [2022-07-14 13:14:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:23,983 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6803 transitions. [2022-07-14 13:14:23,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6803 transitions. [2022-07-14 13:14:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 13:14:23,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:23,988 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] [2022-07-14 13:14:24,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-14 13:14:24,202 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 13:14:24,202 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-14 13:14:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:24,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099749951] [2022-07-14 13:14:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:24,205 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 13:14:24,208 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 13:14:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 13:14:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:24,583 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 13:14:24,599 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 13:14:24,608 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 13:14:24,650 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 13:14:24,654 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 13:14:24,668 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 13:14:24,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:24,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099749951] [2022-07-14 13:14:24,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099749951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:24,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:24,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116820807] [2022-07-14 13:14:24,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:24,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:14:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:14:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:14:24,671 INFO L87 Difference]: Start difference. First operand 4602 states and 6803 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:28,916 INFO L93 Difference]: Finished difference Result 4601 states and 6800 transitions. [2022-07-14 13:14:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:14:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-14 13:14:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:28,922 INFO L225 Difference]: With dead ends: 4601 [2022-07-14 13:14:28,922 INFO L226 Difference]: Without dead ends: 4601 [2022-07-14 13:14:28,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:14:28,923 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 2 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:28,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4562 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-14 13:14:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-07-14 13:14:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4601. [2022-07-14 13:14:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 3924 states have (on average 1.7120285423037718) internal successors, (6718), 4560 states have internal predecessors, (6718), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 6800 transitions. [2022-07-14 13:14:28,967 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 6800 transitions. Word has length 67 [2022-07-14 13:14:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:28,967 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 6800 transitions. [2022-07-14 13:14:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 6800 transitions. [2022-07-14 13:14:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 13:14:28,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:28,968 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] [2022-07-14 13:14:28,984 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 13:14:29,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:29,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-14 13:14:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:29,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603190211] [2022-07-14 13:14:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:29,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:29,184 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:29,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 13:14:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 13:14:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:29,488 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 13:14:29,500 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 13:14:29,521 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 13:14:29,530 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 13:14:29,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:29,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603190211] [2022-07-14 13:14:29,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603190211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:29,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:29,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:29,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055835688] [2022-07-14 13:14:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:29,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:14:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:14:29,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:14:29,533 INFO L87 Difference]: Start difference. First operand 4601 states and 6800 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:32,509 INFO L93 Difference]: Finished difference Result 4600 states and 6796 transitions. [2022-07-14 13:14:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:14:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-14 13:14:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:32,515 INFO L225 Difference]: With dead ends: 4600 [2022-07-14 13:14:32,515 INFO L226 Difference]: Without dead ends: 4600 [2022-07-14 13:14:32,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:14:32,516 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 4 mSDsluCounter, 2870 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:32,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4584 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-14 13:14:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-07-14 13:14:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2022-07-14 13:14:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 3924 states have (on average 1.7110091743119267) internal successors, (6714), 4559 states have internal predecessors, (6714), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 6796 transitions. [2022-07-14 13:14:32,563 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 6796 transitions. Word has length 67 [2022-07-14 13:14:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:32,563 INFO L495 AbstractCegarLoop]: Abstraction has 4600 states and 6796 transitions. [2022-07-14 13:14:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 6796 transitions. [2022-07-14 13:14:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 13:14:32,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:32,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:32,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:32,777 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-14 13:14:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366438161] [2022-07-14 13:14:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:32,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:32,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:32,779 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 13:14:32,781 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 13:14:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 13:14:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:33,173 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 13:14:33,191 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 13:14:33,199 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 13:14:33,232 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 13:14:33,236 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 13:14:33,247 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 13:14:33,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:33,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:33,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366438161] [2022-07-14 13:14:33,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366438161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:33,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:33,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777928292] [2022-07-14 13:14:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:14:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:14:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:14:33,249 INFO L87 Difference]: Start difference. First operand 4600 states and 6796 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:37,470 INFO L93 Difference]: Finished difference Result 4599 states and 6792 transitions. [2022-07-14 13:14:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:14:37,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-14 13:14:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:37,476 INFO L225 Difference]: With dead ends: 4599 [2022-07-14 13:14:37,490 INFO L226 Difference]: Without dead ends: 4599 [2022-07-14 13:14:37,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:14:37,491 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 2 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4557 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:37,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4557 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-14 13:14:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-14 13:14:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4599. [2022-07-14 13:14:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 3920 states have (on average 1.711734693877551) internal successors, (6710), 4558 states have internal predecessors, (6710), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-14 13:14:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 6792 transitions. [2022-07-14 13:14:37,539 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 6792 transitions. Word has length 67 [2022-07-14 13:14:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:37,540 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 6792 transitions. [2022-07-14 13:14:37,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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 13:14:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 6792 transitions. [2022-07-14 13:14:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-14 13:14:37,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:37,541 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, 1, 1] [2022-07-14 13:14:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:37,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:37,743 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2022-07-14 13:14:37,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:37,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043413963] [2022-07-14 13:14:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:37,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:37,745 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:37,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 13:14:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 13:14:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:38,108 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 13:14:38,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:14:38,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:38,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043413963] [2022-07-14 13:14:38,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043413963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:14:38,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:14:38,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:14:38,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082287898] [2022-07-14 13:14:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:14:38,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:14:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:14:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:14:38,111 INFO L87 Difference]: Start difference. First operand 4599 states and 6792 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 13:14:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:38,184 INFO L93 Difference]: Finished difference Result 4602 states and 6801 transitions. [2022-07-14 13:14:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:14:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 75 [2022-07-14 13:14:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:38,194 INFO L225 Difference]: With dead ends: 4602 [2022-07-14 13:14:38,194 INFO L226 Difference]: Without dead ends: 4602 [2022-07-14 13:14:38,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 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 13:14:38,195 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 2 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:38,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:14:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-14 13:14:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-14 13:14:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3922 states have (on average 1.7116267210606833) internal successors, (6713), 4561 states have internal predecessors, (6713), 41 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:14:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6801 transitions. [2022-07-14 13:14:38,259 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6801 transitions. Word has length 75 [2022-07-14 13:14:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:38,260 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6801 transitions. [2022-07-14 13:14:38,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 13:14:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6801 transitions. [2022-07-14 13:14:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 13:14:38,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:38,261 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] [2022-07-14 13:14:38,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:38,480 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1092552202, now seen corresponding path program 1 times [2022-07-14 13:14:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:38,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522719334] [2022-07-14 13:14:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:14:38,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:38,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:38,482 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:38,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 13:14:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:14:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 13:14:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:38,814 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 13:14:38,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:14:38,921 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 13:14:38,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:38,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522719334] [2022-07-14 13:14:38,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522719334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:14:38,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:14:38,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 13:14:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997147773] [2022-07-14 13:14:38,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:14:38,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 13:14:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 13:14:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:14:38,922 INFO L87 Difference]: Start difference. First operand 4602 states and 6801 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:39,161 INFO L93 Difference]: Finished difference Result 4614 states and 6823 transitions. [2022-07-14 13:14:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 13:14:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-07-14 13:14:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:39,181 INFO L225 Difference]: With dead ends: 4614 [2022-07-14 13:14:39,182 INFO L226 Difference]: Without dead ends: 4614 [2022-07-14 13:14:39,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-14 13:14:39,183 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 15 mSDsluCounter, 6827 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8540 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:39,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8540 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:14:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2022-07-14 13:14:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4612. [2022-07-14 13:14:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 3931 states have (on average 1.7115237852963623) internal successors, (6728), 4570 states have internal predecessors, (6728), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:14:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 6816 transitions. [2022-07-14 13:14:39,243 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 6816 transitions. Word has length 76 [2022-07-14 13:14:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:39,243 INFO L495 AbstractCegarLoop]: Abstraction has 4612 states and 6816 transitions. [2022-07-14 13:14:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 6816 transitions. [2022-07-14 13:14:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-14 13:14:39,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:39,245 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] [2022-07-14 13:14:39,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:39,450 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1024769937, now seen corresponding path program 2 times [2022-07-14 13:14:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041580402] [2022-07-14 13:14:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:14:39,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:39,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:39,452 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:39,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 13:14:40,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:14:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:14:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 13:14:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:40,084 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 13:14:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:14:40,270 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 13:14:40,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:40,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041580402] [2022-07-14 13:14:40,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041580402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:14:40,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:14:40,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-14 13:14:40,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983283080] [2022-07-14 13:14:40,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:14:40,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 13:14:40,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 13:14:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-14 13:14:40,272 INFO L87 Difference]: Start difference. First operand 4612 states and 6816 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:40,893 INFO L93 Difference]: Finished difference Result 4633 states and 6864 transitions. [2022-07-14 13:14:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 13:14:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-07-14 13:14:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:40,906 INFO L225 Difference]: With dead ends: 4633 [2022-07-14 13:14:40,907 INFO L226 Difference]: Without dead ends: 4629 [2022-07-14 13:14:40,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-14 13:14:40,908 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 50 mSDsluCounter, 10264 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 11980 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:40,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 11980 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 13:14:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-07-14 13:14:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4621. [2022-07-14 13:14:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 3940 states have (on average 1.7106598984771573) internal successors, (6740), 4579 states have internal predecessors, (6740), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:14:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 6828 transitions. [2022-07-14 13:14:40,964 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 6828 transitions. Word has length 79 [2022-07-14 13:14:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:40,964 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 6828 transitions. [2022-07-14 13:14:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 6828 transitions. [2022-07-14 13:14:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 13:14:40,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:40,966 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] [2022-07-14 13:14:40,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 13:14:41,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:41,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash 876217103, now seen corresponding path program 3 times [2022-07-14 13:14:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:41,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007736577] [2022-07-14 13:14:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:14:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:41,184 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:41,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 13:14:41,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 13:14:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:14:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 13:14:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:42,057 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 13:14:42,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:14:42,613 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 13:14:42,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007736577] [2022-07-14 13:14:42,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007736577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:14:42,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:14:42,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-14 13:14:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416935778] [2022-07-14 13:14:42,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:14:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 13:14:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 13:14:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-14 13:14:42,616 INFO L87 Difference]: Start difference. First operand 4621 states and 6828 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:14:45,801 INFO L93 Difference]: Finished difference Result 4663 states and 6965 transitions. [2022-07-14 13:14:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 13:14:45,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-07-14 13:14:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:14:45,811 INFO L225 Difference]: With dead ends: 4663 [2022-07-14 13:14:45,812 INFO L226 Difference]: Without dead ends: 4657 [2022-07-14 13:14:45,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 13:14:45,813 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 125 mSDsluCounter, 20567 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22287 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:14:45,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 22287 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 13:14:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-07-14 13:14:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4639. [2022-07-14 13:14:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 3958 states have (on average 1.7086912582112177) internal successors, (6763), 4597 states have internal predecessors, (6763), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:14:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 6851 transitions. [2022-07-14 13:14:45,868 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 6851 transitions. Word has length 85 [2022-07-14 13:14:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:14:45,868 INFO L495 AbstractCegarLoop]: Abstraction has 4639 states and 6851 transitions. [2022-07-14 13:14:45,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:14:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 6851 transitions. [2022-07-14 13:14:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 13:14:45,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:14:45,870 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] [2022-07-14 13:14:45,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-14 13:14:46,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:14:46,085 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:14:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:14:46,086 INFO L85 PathProgramCache]: Analyzing trace with hash -990633905, now seen corresponding path program 4 times [2022-07-14 13:14:46,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:14:46,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617511257] [2022-07-14 13:14:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 13:14:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:14:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:14:46,087 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:14:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 13:14:46,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 13:14:46,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:14:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 13:14:46,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:14:46,798 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 13:14:46,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:14:48,337 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 13:14:48,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:14:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617511257] [2022-07-14 13:14:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617511257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:14:48,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:14:48,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-14 13:14:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352866939] [2022-07-14 13:14:48,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:14:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-14 13:14:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:14:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-14 13:14:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 13:14:48,340 INFO L87 Difference]: Start difference. First operand 4639 states and 6851 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:15:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:15:00,182 INFO L93 Difference]: Finished difference Result 4719 states and 7068 transitions. [2022-07-14 13:15:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-14 13:15:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-07-14 13:15:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:15:00,198 INFO L225 Difference]: With dead ends: 4719 [2022-07-14 13:15:00,199 INFO L226 Difference]: Without dead ends: 4715 [2022-07-14 13:15:00,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-14 13:15:00,202 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 419 mSDsluCounter, 41453 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 43186 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:15:00,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 43186 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-14 13:15:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2022-07-14 13:15:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4673. [2022-07-14 13:15:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 3992 states have (on average 1.7056613226452906) internal successors, (6809), 4631 states have internal predecessors, (6809), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:15:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 6897 transitions. [2022-07-14 13:15:00,268 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 6897 transitions. Word has length 97 [2022-07-14 13:15:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:15:00,268 INFO L495 AbstractCegarLoop]: Abstraction has 4673 states and 6897 transitions. [2022-07-14 13:15:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:15:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 6897 transitions. [2022-07-14 13:15:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 13:15:00,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:15:00,270 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] [2022-07-14 13:15:00,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-14 13:15:00,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:15:00,486 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:15:00,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:15:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357521, now seen corresponding path program 5 times [2022-07-14 13:15:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:15:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106546609] [2022-07-14 13:15:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:15:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:15:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:15:00,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:15:00,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 13:15:01,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:15:01,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:15:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 13:15:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:15:01,894 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 13:15:01,977 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:15:01,978 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 17 treesize of output 24 [2022-07-14 13:15:01,997 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 13:15:02,063 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 13:15:03,372 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:15:03,372 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 13:15:03,397 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 13:15:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-14 13:15:03,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:15:03,643 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-14 13:15:03,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:15:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106546609] [2022-07-14 13:15:03,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106546609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:15:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104423026] [2022-07-14 13:15:03,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:15:03,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:15:03,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:15:03,648 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 13:15:03,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-14 13:16:30,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-14 13:16:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:16:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 13:16:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:16:31,187 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 13:16:31,277 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 13:16:31,277 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 17 treesize of output 24 [2022-07-14 13:16:31,291 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 13:16:31,342 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 13:16:32,623 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:16:32,624 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 13:16:32,650 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 13:16:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-14 13:16:32,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:16:32,855 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3175) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-14 13:16:32,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104423026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:16:32,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:16:32,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 13:16:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032649758] [2022-07-14 13:16:32,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:16:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 13:16:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 13:16:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 13:16:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=10, NotChecked=38, Total=156 [2022-07-14 13:16:32,859 INFO L87 Difference]: Start difference. First operand 4673 states and 6897 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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 13:16:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:16:36,670 INFO L93 Difference]: Finished difference Result 6840 states and 10243 transitions. [2022-07-14 13:16:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 13:16:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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 119 [2022-07-14 13:16:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:16:36,685 INFO L225 Difference]: With dead ends: 6840 [2022-07-14 13:16:36,686 INFO L226 Difference]: Without dead ends: 6836 [2022-07-14 13:16:36,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 141 SyntacticMatches, 92 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=12, NotChecked=46, Total=210 [2022-07-14 13:16:36,687 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 1589 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 5916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3303 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-14 13:16:36,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 5242 Invalid, 5916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2601 Invalid, 0 Unknown, 3303 Unchecked, 3.7s Time] [2022-07-14 13:16:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-07-14 13:16:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 4721. [2022-07-14 13:16:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4040 states have (on average 1.6967821782178218) internal successors, (6855), 4678 states have internal predecessors, (6855), 41 states have call successors, (41), 5 states have call predecessors, (41), 6 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-14 13:16:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6943 transitions. [2022-07-14 13:16:36,752 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6943 transitions. Word has length 119 [2022-07-14 13:16:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:16:36,753 INFO L495 AbstractCegarLoop]: Abstraction has 4721 states and 6943 transitions. [2022-07-14 13:16:36,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 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 13:16:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6943 transitions. [2022-07-14 13:16:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 13:16:36,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:16:36,755 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] [2022-07-14 13:16:36,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-14 13:16:36,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-14 13:16:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 13:16:37,180 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-14 13:16:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:16:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357520, now seen corresponding path program 1 times [2022-07-14 13:16:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 13:16:37,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682140342] [2022-07-14 13:16:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:16:37,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 13:16:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 13:16:37,182 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 13:16:37,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 13:16:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:16:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-14 13:16:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:16:37,998 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 13:16:38,084 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 13:16:38,084 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 11 treesize of output 11 [2022-07-14 13:16:38,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 13:16:38,108 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 13:16:38,137 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 13:16:38,208 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 13:16:38,213 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 9 treesize of output 3 [2022-07-14 13:16:38,346 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3560 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3560))) (exists ((v_ArrVal_3559 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3559)))) is different from true [2022-07-14 13:16:38,355 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3561 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3561))) (exists ((v_ArrVal_3562 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3562))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-14 13:16:38,367 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3564 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3564) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3563 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3563) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-14 13:16:38,474 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3575 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3575) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3576 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3576)))) is different from true [2022-07-14 13:16:38,523 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3581 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3581))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3582 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3582)))) is different from true [2022-07-14 13:16:38,533 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3583 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3583))) (exists ((v_ArrVal_3584 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3584)))) is different from true [2022-07-14 13:16:38,541 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3585 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3585) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3586 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3586)))) is different from true [2022-07-14 13:16:38,568 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3589 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3589))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3590)))) is different from true [2022-07-14 13:16:38,613 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3595 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3595))) (exists ((v_ArrVal_3596 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3596) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-14 13:16:38,643 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3599))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3600 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3600) |c_#memory_$Pointer$.base|))) is different from true [2022-07-14 13:16:38,671 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3604) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3603 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3603) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-14 13:16:38,679 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3605 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3605) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3606)))) is different from true [2022-07-14 13:16:38,696 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607) |c_#memory_$Pointer$.base|))) is different from true [2022-07-14 13:16:38,704 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3609) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3610)))) is different from true [2022-07-14 13:16:38,742 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3614 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3614) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3613 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3613) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-14 13:16:38,752 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616)))) is different from true [2022-07-14 13:16:38,762 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3617) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3618 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3618)))) is different from true [2022-07-14 13:16:38,798 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-14 13:16:38,835 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3625))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3626 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3626)))) is different from true [2022-07-14 13:16:38,846 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627))) (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628)))) is different from true [2022-07-14 13:16:38,910 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3633 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3633))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3634 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3634)))) is different from true [2022-07-14 13:16:38,920 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3636 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3636))) (exists ((v_ArrVal_3635 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3635) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-14 13:16:38,930 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3637 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3637))) (exists ((v_ArrVal_3638 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3638)))) is different from true [2022-07-14 13:16:38,965 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 13:16:38,966 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 13:16:38,972 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 13:16:39,010 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 13:16:39,015 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 19 treesize of output 7 [2022-07-14 13:16:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 210 trivial. 759 not checked. [2022-07-14 13:16:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:16:39,789 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2022-07-14 13:16:39,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 13:16:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682140342] [2022-07-14 13:16:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682140342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:16:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [390437743] [2022-07-14 13:16:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:16:39,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 13:16:39,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 13:16:39,797 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 13:16:39,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process