./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:12:09,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:12:09,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:12:10,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:12:10,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:12:10,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:12:10,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:12:10,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:12:10,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:12:10,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:12:10,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:12:10,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:12:10,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:12:10,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:12:10,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:12:10,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:12:10,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:12:10,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:12:10,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:12:10,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:12:10,078 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:12:10,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:12:10,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:12:10,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:12:10,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:12:10,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:12:10,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:12:10,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:12:10,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:12:10,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:12:10,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:12:10,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:12:10,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:12:10,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:12:10,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:12:10,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:12:10,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:12:10,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:12:10,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:12:10,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:12:10,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:12:10,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:12:10,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-22 00:12:10,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:12:10,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:12:10,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:12:10,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:12:10,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:12:10,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:12:10,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:12:10,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:12:10,148 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:12:10,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:12:10,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:12:10,150 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:12:10,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:12:10,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:12:10,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:12:10,151 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-22 00:12:10,151 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-22 00:12:10,151 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-22 00:12:10,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:12:10,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 00:12:10,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:12:10,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:12:10,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:12:10,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:12:10,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:12:10,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:12:10,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:12:10,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:12:10,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:12:10,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:12:10,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2022-07-22 00:12:10,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:12:10,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:12:10,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:12:10,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:12:10,537 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:12:10,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-22 00:12:10,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30856bf61/54c6973fb71e41c39c8098cca7ca90ab/FLAG30b8274cd [2022-07-22 00:12:11,239 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:12:11,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-22 00:12:11,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30856bf61/54c6973fb71e41c39c8098cca7ca90ab/FLAG30b8274cd [2022-07-22 00:12:11,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30856bf61/54c6973fb71e41c39c8098cca7ca90ab [2022-07-22 00:12:11,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:12:11,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:12:11,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:12:11,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:12:11,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:12:11,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:12:11" (1/1) ... [2022-07-22 00:12:11,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34225ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:11, skipping insertion in model container [2022-07-22 00:12:11,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:12:11" (1/1) ... [2022-07-22 00:12:11,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:12:11,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:12:11,994 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-22 00:12:12,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:12:12,320 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-22 00:12:12,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15f9df6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:12, skipping insertion in model container [2022-07-22 00:12:12,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:12:12,322 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-22 00:12:12,324 INFO L158 Benchmark]: Toolchain (without parser) took 898.46ms. Allocated memory is still 71.3MB. Free memory was 51.1MB in the beginning and 41.7MB in the end (delta: 9.4MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2022-07-22 00:12:12,325 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 71.3MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 00:12:12,326 INFO L158 Benchmark]: CACSL2BoogieTranslator took 894.86ms. Allocated memory is still 71.3MB. Free memory was 50.9MB in the beginning and 42.0MB in the end (delta: 8.9MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2022-07-22 00:12:12,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 71.3MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 894.86ms. Allocated memory is still 71.3MB. Free memory was 50.9MB in the beginning and 42.0MB in the end (delta: 8.9MB). Peak memory consumption was 22.3MB. 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_SAX_test10-3.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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:12:14,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:12:14,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:12:14,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:12:14,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:12:14,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:12:14,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:12:14,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:12:14,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:12:14,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:12:14,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:12:14,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:12:14,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:12:14,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:12:14,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:12:14,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:12:14,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:12:14,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:12:14,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:12:14,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:12:14,329 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:12:14,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:12:14,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:12:14,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:12:14,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:12:14,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:12:14,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:12:14,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:12:14,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:12:14,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:12:14,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:12:14,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:12:14,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:12:14,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:12:14,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:12:14,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:12:14,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:12:14,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:12:14,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:12:14,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:12:14,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:12:14,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:12:14,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-22 00:12:14,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:12:14,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:12:14,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:12:14,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:12:14,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:12:14,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:12:14,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:12:14,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:12:14,388 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:12:14,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:12:14,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 00:12:14,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:12:14,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:12:14,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 00:12:14,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 00:12:14,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:12:14,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:12:14,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:12:14,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:12:14,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:12:14,399 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 00:12:14,399 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 00:12:14,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 00:12:14,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2022-07-22 00:12:14,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:12:14,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:12:14,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:12:14,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:12:14,757 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:12:14,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-22 00:12:14,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97d33ed5/073867fd67ca4bc08ebde02b88d769ea/FLAG1333fefd5 [2022-07-22 00:12:15,472 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:12:15,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-22 00:12:15,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97d33ed5/073867fd67ca4bc08ebde02b88d769ea/FLAG1333fefd5 [2022-07-22 00:12:15,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97d33ed5/073867fd67ca4bc08ebde02b88d769ea [2022-07-22 00:12:15,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:12:15,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:12:15,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:12:15,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:12:15,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:12:15,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:12:15" (1/1) ... [2022-07-22 00:12:15,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39459a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:15, skipping insertion in model container [2022-07-22 00:12:15,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:12:15" (1/1) ... [2022-07-22 00:12:15,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:12:15,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:12:16,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-22 00:12:16,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:12:16,470 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-22 00:12:16,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:12:16,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-22 00:12:16,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:12:16,603 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:12:16,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-22 00:12:16,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:12:16,807 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:12:16,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16 WrapperNode [2022-07-22 00:12:16,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:12:16,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:12:16,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:12:16,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:12:16,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:16,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:16,982 INFO L137 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2491 [2022-07-22 00:12:16,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:12:16,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:12:16,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:12:16,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:12:16,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:16,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:12:17,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:12:17,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:12:17,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:12:17,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (1/1) ... [2022-07-22 00:12:17,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:12:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:12:17,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 00:12:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 00:12:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-22 00:12:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-22 00:12:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-22 00:12:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-22 00:12:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 00:12:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 00:12:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 00:12:17,237 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-22 00:12:17,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 00:12:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 00:12:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-22 00:12:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 00:12:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:12:17,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:12:17,597 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:12:17,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:12:17,602 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 00:12:26,182 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:12:26,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:12:26,204 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2022-07-22 00:12:26,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:12:26 BoogieIcfgContainer [2022-07-22 00:12:26,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:12:26,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:12:26,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:12:26,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:12:26,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:12:15" (1/3) ... [2022-07-22 00:12:26,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768d2eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:12:26, skipping insertion in model container [2022-07-22 00:12:26,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:12:16" (2/3) ... [2022-07-22 00:12:26,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768d2eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:12:26, skipping insertion in model container [2022-07-22 00:12:26,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:12:26" (3/3) ... [2022-07-22 00:12:26,219 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2022-07-22 00:12:26,234 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:12:26,235 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2022-07-22 00:12:26,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:12:26,323 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@69735bb9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5d4e4bb [2022-07-22 00:12:26,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2022-07-22 00:12:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 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) [2022-07-22 00:12:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-22 00:12:26,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:26,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-22 00:12:26,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-22 00:12:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993947950] [2022-07-22 00:12:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:26,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:26,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:26,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 00:12:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:12:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:26,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:26,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:26,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:26,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993947950] [2022-07-22 00:12:26,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993947950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:26,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:26,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:12:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794096149] [2022-07-22 00:12:26,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:26,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:26,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:26,694 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 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) [2022-07-22 00:12:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:30,937 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2022-07-22 00:12:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-22 00:12:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:30,971 INFO L225 Difference]: With dead ends: 3281 [2022-07-22 00:12:30,972 INFO L226 Difference]: Without dead ends: 3279 [2022-07-22 00:12:30,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:30,976 INFO L413 NwaCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-22 00:12:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-07-22 00:12:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2022-07-22 00:12:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 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) [2022-07-22 00:12:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2022-07-22 00:12:31,120 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2022-07-22 00:12:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:31,121 INFO L495 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2022-07-22 00:12:31,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:12:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2022-07-22 00:12:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-22 00:12:31,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:31,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-22 00:12:31,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 00:12:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:31,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-22 00:12:31,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:31,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448928496] [2022-07-22 00:12:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:31,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:31,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:31,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 00:12:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:12:31,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:31,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:31,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:31,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448928496] [2022-07-22 00:12:31,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448928496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:31,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:31,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:12:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965329412] [2022-07-22 00:12:31,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:31,568 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:12:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:36,865 INFO L93 Difference]: Finished difference Result 3727 states and 4170 transitions. [2022-07-22 00:12:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-22 00:12:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:36,877 INFO L225 Difference]: With dead ends: 3727 [2022-07-22 00:12:36,877 INFO L226 Difference]: Without dead ends: 3727 [2022-07-22 00:12:36,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:36,879 INFO L413 NwaCegarLoop]: 2045 mSDtfsCounter, 1240 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:36,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3433 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-22 00:12:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2022-07-22 00:12:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3028. [2022-07-22 00:12:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 1845 states have (on average 2.0233062330623306) internal successors, (3733), 3009 states have internal predecessors, (3733), 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) [2022-07-22 00:12:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3771 transitions. [2022-07-22 00:12:36,940 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3771 transitions. Word has length 3 [2022-07-22 00:12:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:36,941 INFO L495 AbstractCegarLoop]: Abstraction has 3028 states and 3771 transitions. [2022-07-22 00:12:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:12:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3771 transitions. [2022-07-22 00:12:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 00:12:36,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:36,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:12:36,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:37,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:37,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-22 00:12:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719318607] [2022-07-22 00:12:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:37,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:37,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 00:12:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:12:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:37,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:37,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 00:12:37,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 00:12:37,472 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 00:12:37,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-22 00:12:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:37,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:37,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:37,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719318607] [2022-07-22 00:12:37,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719318607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:37,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:37,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:12:37,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836159883] [2022-07-22 00:12:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:37,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:12:37,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:12:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:12:37,502 INFO L87 Difference]: Start difference. First operand 3028 states and 3771 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) [2022-07-22 00:12:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:47,014 INFO L93 Difference]: Finished difference Result 6006 states and 6937 transitions. [2022-07-22 00:12:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:12:47,015 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 [2022-07-22 00:12:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:47,036 INFO L225 Difference]: With dead ends: 6006 [2022-07-22 00:12:47,036 INFO L226 Difference]: Without dead ends: 6006 [2022-07-22 00:12:47,037 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 [2022-07-22 00:12:47,038 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 3127 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:47,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3137 Valid, 3162 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-07-22 00:12:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2022-07-22 00:12:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3747. [2022-07-22 00:12:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2564 states have (on average 2.0514820592823715) internal successors, (5260), 3722 states have internal predecessors, (5260), 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) [2022-07-22 00:12:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5310 transitions. [2022-07-22 00:12:47,145 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5310 transitions. Word has length 7 [2022-07-22 00:12:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:47,145 INFO L495 AbstractCegarLoop]: Abstraction has 3747 states and 5310 transitions. [2022-07-22 00:12:47,145 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) [2022-07-22 00:12:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5310 transitions. [2022-07-22 00:12:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:12:47,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:47,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:12:47,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-22 00:12:47,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:47,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-22 00:12:47,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:47,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860146029] [2022-07-22 00:12:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:47,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:47,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:47,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:47,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 00:12:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:12:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:47,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:47,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:47,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860146029] [2022-07-22 00:12:47,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860146029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:47,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:47,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:12:47,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680213483] [2022-07-22 00:12:47,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:47,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:47,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:47,573 INFO L87 Difference]: Start difference. First operand 3747 states and 5310 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) [2022-07-22 00:12:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:50,694 INFO L93 Difference]: Finished difference Result 4951 states and 6827 transitions. [2022-07-22 00:12:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:50,695 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 [2022-07-22 00:12:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:50,709 INFO L225 Difference]: With dead ends: 4951 [2022-07-22 00:12:50,709 INFO L226 Difference]: Without dead ends: 4951 [2022-07-22 00:12:50,710 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 [2022-07-22 00:12:50,710 INFO L413 NwaCegarLoop]: 2366 mSDtfsCounter, 1998 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:50,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 3212 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 00:12:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2022-07-22 00:12:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3656. [2022-07-22 00:12:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2564 states have (on average 1.968408736349454) internal successors, (5047), 3631 states have internal predecessors, (5047), 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) [2022-07-22 00:12:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5097 transitions. [2022-07-22 00:12:50,814 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5097 transitions. Word has length 8 [2022-07-22 00:12:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:50,818 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 5097 transitions. [2022-07-22 00:12:50,818 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) [2022-07-22 00:12:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5097 transitions. [2022-07-22 00:12:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:12:50,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:50,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:12:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:51,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:51,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-22 00:12:51,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:51,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826972993] [2022-07-22 00:12:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:51,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:51,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:51,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:51,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 00:12:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:12:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:51,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:51,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:51,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826972993] [2022-07-22 00:12:51,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826972993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:51,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:51,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 00:12:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185364206] [2022-07-22 00:12:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:51,260 INFO L87 Difference]: Start difference. First operand 3656 states and 5097 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) [2022-07-22 00:12:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:55,192 INFO L93 Difference]: Finished difference Result 5371 states and 7455 transitions. [2022-07-22 00:12:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:55,192 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 [2022-07-22 00:12:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:55,206 INFO L225 Difference]: With dead ends: 5371 [2022-07-22 00:12:55,206 INFO L226 Difference]: Without dead ends: 5371 [2022-07-22 00:12:55,206 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 [2022-07-22 00:12:55,207 INFO L413 NwaCegarLoop]: 2746 mSDtfsCounter, 1369 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:55,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 3931 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 00:12:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2022-07-22 00:12:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3978. [2022-07-22 00:12:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2896 states have (on average 1.9540745856353592) internal successors, (5659), 3953 states have internal predecessors, (5659), 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) [2022-07-22 00:12:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5709 transitions. [2022-07-22 00:12:55,279 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5709 transitions. Word has length 8 [2022-07-22 00:12:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:55,279 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5709 transitions. [2022-07-22 00:12:55,279 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) [2022-07-22 00:12:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5709 transitions. [2022-07-22 00:12:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 00:12:55,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:55,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:12:55,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:55,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:55,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-22 00:12:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127636775] [2022-07-22 00:12:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:55,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:55,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:55,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 00:12:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:55,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 00:12:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:55,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:55,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:55,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127636775] [2022-07-22 00:12:55,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127636775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:55,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:55,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:12:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595649938] [2022-07-22 00:12:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:55,706 INFO L87 Difference]: Start difference. First operand 3978 states and 5709 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) [2022-07-22 00:12:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:55,765 INFO L93 Difference]: Finished difference Result 3918 states and 5623 transitions. [2022-07-22 00:12:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:55,779 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 [2022-07-22 00:12:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:55,812 INFO L225 Difference]: With dead ends: 3918 [2022-07-22 00:12:55,813 INFO L226 Difference]: Without dead ends: 3918 [2022-07-22 00:12:55,813 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 [2022-07-22 00:12:55,814 INFO L413 NwaCegarLoop]: 2407 mSDtfsCounter, 1197 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:55,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 3623 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:12:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-07-22 00:12:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2022-07-22 00:12:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2860 states have (on average 1.9486013986013986) internal successors, (5573), 3893 states have internal predecessors, (5573), 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) [2022-07-22 00:12:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5623 transitions. [2022-07-22 00:12:55,927 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5623 transitions. Word has length 11 [2022-07-22 00:12:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:55,928 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 5623 transitions. [2022-07-22 00:12:55,928 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) [2022-07-22 00:12:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5623 transitions. [2022-07-22 00:12:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 00:12:55,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:55,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:12:55,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:56,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-22 00:12:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:56,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998574145] [2022-07-22 00:12:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:56,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:56,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:56,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:56,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 00:12:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:12:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:56,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:56,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998574145] [2022-07-22 00:12:56,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998574145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:56,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:56,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:12:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916358274] [2022-07-22 00:12:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:56,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:12:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:56,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:12:56,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:12:56,323 INFO L87 Difference]: Start difference. First operand 3918 states and 5623 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) [2022-07-22 00:12:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:56,448 INFO L93 Difference]: Finished difference Result 3890 states and 5567 transitions. [2022-07-22 00:12:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:12:56,449 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 [2022-07-22 00:12:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:56,460 INFO L225 Difference]: With dead ends: 3890 [2022-07-22 00:12:56,460 INFO L226 Difference]: Without dead ends: 3890 [2022-07-22 00:12:56,461 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 [2022-07-22 00:12:56,462 INFO L413 NwaCegarLoop]: 2362 mSDtfsCounter, 1168 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5933 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:56,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 5933 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:12:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-07-22 00:12:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2022-07-22 00:12:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 2844 states have (on average 1.939170182841069) internal successors, (5515), 3863 states have internal predecessors, (5515), 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) [2022-07-22 00:12:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5565 transitions. [2022-07-22 00:12:56,540 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5565 transitions. Word has length 13 [2022-07-22 00:12:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:56,540 INFO L495 AbstractCegarLoop]: Abstraction has 3888 states and 5565 transitions. [2022-07-22 00:12:56,541 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) [2022-07-22 00:12:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5565 transitions. [2022-07-22 00:12:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 00:12:56,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:56,542 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] [2022-07-22 00:12:56,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:56,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:56,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-22 00:12:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:56,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71113724] [2022-07-22 00:12:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:56,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:56,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:56,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 00:12:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 00:12:56,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:56,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:56,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71113724] [2022-07-22 00:12:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71113724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:57,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:57,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:12:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73677810] [2022-07-22 00:12:57,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:57,002 INFO L87 Difference]: Start difference. First operand 3888 states and 5565 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) [2022-07-22 00:12:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:57,073 INFO L93 Difference]: Finished difference Result 5514 states and 7318 transitions. [2022-07-22 00:12:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:57,074 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 [2022-07-22 00:12:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:57,085 INFO L225 Difference]: With dead ends: 5514 [2022-07-22 00:12:57,086 INFO L226 Difference]: Without dead ends: 5514 [2022-07-22 00:12:57,086 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 [2022-07-22 00:12:57,087 INFO L413 NwaCegarLoop]: 4091 mSDtfsCounter, 2288 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:57,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 5893 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:12:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2022-07-22 00:12:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 3828. [2022-07-22 00:12:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2808 states have (on average 1.9334045584045585) internal successors, (5429), 3803 states have internal predecessors, (5429), 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) [2022-07-22 00:12:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5479 transitions. [2022-07-22 00:12:57,150 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5479 transitions. Word has length 20 [2022-07-22 00:12:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:57,151 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 5479 transitions. [2022-07-22 00:12:57,151 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) [2022-07-22 00:12:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5479 transitions. [2022-07-22 00:12:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 00:12:57,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:57,152 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] [2022-07-22 00:12:57,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:57,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-22 00:12:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002084397] [2022-07-22 00:12:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:57,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:57,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:57,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 00:12:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 00:12:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:57,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:57,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002084397] [2022-07-22 00:12:57,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002084397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:57,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:57,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:12:57,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032699536] [2022-07-22 00:12:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:57,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:12:57,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:12:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:12:57,611 INFO L87 Difference]: Start difference. First operand 3828 states and 5479 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) [2022-07-22 00:12:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:57,678 INFO L93 Difference]: Finished difference Result 5347 states and 7027 transitions. [2022-07-22 00:12:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:12:57,679 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 [2022-07-22 00:12:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:57,691 INFO L225 Difference]: With dead ends: 5347 [2022-07-22 00:12:57,692 INFO L226 Difference]: Without dead ends: 5347 [2022-07-22 00:12:57,692 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 [2022-07-22 00:12:57,694 INFO L413 NwaCegarLoop]: 3778 mSDtfsCounter, 2245 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 5532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:57,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2255 Valid, 5532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:12:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-07-22 00:12:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3696. [2022-07-22 00:12:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2700 states have (on average 1.915185185185185) internal successors, (5171), 3671 states have internal predecessors, (5171), 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) [2022-07-22 00:12:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5221 transitions. [2022-07-22 00:12:57,756 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5221 transitions. Word has length 20 [2022-07-22 00:12:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:57,757 INFO L495 AbstractCegarLoop]: Abstraction has 3696 states and 5221 transitions. [2022-07-22 00:12:57,757 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) [2022-07-22 00:12:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5221 transitions. [2022-07-22 00:12:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 00:12:57,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:57,759 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] [2022-07-22 00:12:57,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:57,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-22 00:12:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:57,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356711491] [2022-07-22 00:12:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:57,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:57,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:57,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 00:12:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:12:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:58,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:58,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:58,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356711491] [2022-07-22 00:12:58,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356711491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:58,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:58,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:12:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923530501] [2022-07-22 00:12:58,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:12:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:12:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:12:58,254 INFO L87 Difference]: Start difference. First operand 3696 states and 5221 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) [2022-07-22 00:12:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:58,354 INFO L93 Difference]: Finished difference Result 5312 states and 6961 transitions. [2022-07-22 00:12:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:12:58,354 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 [2022-07-22 00:12:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:58,363 INFO L225 Difference]: With dead ends: 5312 [2022-07-22 00:12:58,363 INFO L226 Difference]: Without dead ends: 5312 [2022-07-22 00:12:58,364 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 [2022-07-22 00:12:58,364 INFO L413 NwaCegarLoop]: 3960 mSDtfsCounter, 2216 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 9672 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:58,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 9672 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:12:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2022-07-22 00:12:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3666. [2022-07-22 00:12:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2684 states have (on average 1.9049925484351713) internal successors, (5113), 3641 states have internal predecessors, (5113), 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) [2022-07-22 00:12:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5163 transitions. [2022-07-22 00:12:58,448 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5163 transitions. Word has length 22 [2022-07-22 00:12:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:58,449 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5163 transitions. [2022-07-22 00:12:58,449 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) [2022-07-22 00:12:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5163 transitions. [2022-07-22 00:12:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 00:12:58,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:58,450 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] [2022-07-22 00:12:58,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:58,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:58,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-22 00:12:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518651818] [2022-07-22 00:12:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:58,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:58,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:58,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 00:12:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:12:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:58,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:58,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518651818] [2022-07-22 00:12:58,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518651818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:58,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:58,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:12:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463893134] [2022-07-22 00:12:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:12:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:12:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:12:58,908 INFO L87 Difference]: Start difference. First operand 3666 states and 5163 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) [2022-07-22 00:12:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:12:58,997 INFO L93 Difference]: Finished difference Result 5239 states and 6772 transitions. [2022-07-22 00:12:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:12:58,997 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 [2022-07-22 00:12:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:12:59,008 INFO L225 Difference]: With dead ends: 5239 [2022-07-22 00:12:59,008 INFO L226 Difference]: Without dead ends: 5239 [2022-07-22 00:12:59,009 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 [2022-07-22 00:12:59,009 INFO L413 NwaCegarLoop]: 3885 mSDtfsCounter, 2181 mSDsluCounter, 5597 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 9482 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:12:59,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2191 Valid, 9482 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:12:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2022-07-22 00:12:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 3604. [2022-07-22 00:12:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2636 states have (on average 1.8736722306525038) internal successors, (4939), 3579 states have internal predecessors, (4939), 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) [2022-07-22 00:12:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4989 transitions. [2022-07-22 00:12:59,063 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4989 transitions. Word has length 22 [2022-07-22 00:12:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:12:59,064 INFO L495 AbstractCegarLoop]: Abstraction has 3604 states and 4989 transitions. [2022-07-22 00:12:59,064 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) [2022-07-22 00:12:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4989 transitions. [2022-07-22 00:12:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 00:12:59,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:12:59,065 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] [2022-07-22 00:12:59,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 00:12:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:12:59,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:12:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:12:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-22 00:12:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:12:59,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474088203] [2022-07-22 00:12:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:12:59,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:12:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:12:59,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:12:59,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 00:12:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:12:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:12:59,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:12:59,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:12:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:12:59,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:12:59,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:12:59,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474088203] [2022-07-22 00:12:59,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474088203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:12:59,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:12:59,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:12:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823540895] [2022-07-22 00:12:59,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:12:59,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:12:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:12:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:12:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:12:59,531 INFO L87 Difference]: Start difference. First operand 3604 states and 4989 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) [2022-07-22 00:13:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:03,254 INFO L93 Difference]: Finished difference Result 4225 states and 5525 transitions. [2022-07-22 00:13:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:03,255 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 [2022-07-22 00:13:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:03,263 INFO L225 Difference]: With dead ends: 4225 [2022-07-22 00:13:03,264 INFO L226 Difference]: Without dead ends: 4225 [2022-07-22 00:13:03,264 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 [2022-07-22 00:13:03,265 INFO L413 NwaCegarLoop]: 1515 mSDtfsCounter, 3097 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:03,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3103 Valid, 2793 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-22 00:13:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-07-22 00:13:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3600. [2022-07-22 00:13:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 2636 states have (on average 1.8706373292867982) internal successors, (4931), 3575 states have internal predecessors, (4931), 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) [2022-07-22 00:13:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4981 transitions. [2022-07-22 00:13:03,322 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4981 transitions. Word has length 27 [2022-07-22 00:13:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:03,322 INFO L495 AbstractCegarLoop]: Abstraction has 3600 states and 4981 transitions. [2022-07-22 00:13:03,322 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) [2022-07-22 00:13:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4981 transitions. [2022-07-22 00:13:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 00:13:03,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:03,326 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] [2022-07-22 00:13:03,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:03,536 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-22 00:13:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117013945] [2022-07-22 00:13:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:03,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:03,539 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:03,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 00:13:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:13:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:03,795 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 [2022-07-22 00:13:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:03,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:03,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117013945] [2022-07-22 00:13:03,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117013945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:03,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:03,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:03,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178463053] [2022-07-22 00:13:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:03,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:03,940 INFO L87 Difference]: Start difference. First operand 3600 states and 4981 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) [2022-07-22 00:13:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:08,939 INFO L93 Difference]: Finished difference Result 4679 states and 6151 transitions. [2022-07-22 00:13:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:13:08,940 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 [2022-07-22 00:13:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:08,949 INFO L225 Difference]: With dead ends: 4679 [2022-07-22 00:13:08,950 INFO L226 Difference]: Without dead ends: 4679 [2022-07-22 00:13:08,950 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 [2022-07-22 00:13:08,951 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 2279 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2279 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:08,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2279 Valid, 4099 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-22 00:13:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-07-22 00:13:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3636. [2022-07-22 00:13:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2672 states have (on average 1.8607784431137724) internal successors, (4972), 3611 states have internal predecessors, (4972), 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) [2022-07-22 00:13:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5022 transitions. [2022-07-22 00:13:08,993 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5022 transitions. Word has length 27 [2022-07-22 00:13:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:08,994 INFO L495 AbstractCegarLoop]: Abstraction has 3636 states and 5022 transitions. [2022-07-22 00:13:08,994 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) [2022-07-22 00:13:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5022 transitions. [2022-07-22 00:13:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:13:08,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:08,995 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] [2022-07-22 00:13:09,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:09,205 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-22 00:13:09,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:09,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434140606] [2022-07-22 00:13:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:09,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:09,208 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:09,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 00:13:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:13:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:09,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:09,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:09,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434140606] [2022-07-22 00:13:09,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434140606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:09,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:09,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329280349] [2022-07-22 00:13:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:09,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:09,495 INFO L87 Difference]: Start difference. First operand 3636 states and 5022 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) [2022-07-22 00:13:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:13,642 INFO L93 Difference]: Finished difference Result 7033 states and 9556 transitions. [2022-07-22 00:13:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:13:13,642 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 [2022-07-22 00:13:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:13,653 INFO L225 Difference]: With dead ends: 7033 [2022-07-22 00:13:13,653 INFO L226 Difference]: Without dead ends: 7033 [2022-07-22 00:13:13,654 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 [2022-07-22 00:13:13,654 INFO L413 NwaCegarLoop]: 2580 mSDtfsCounter, 4500 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 4978 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:13,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4507 Valid, 4978 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 00:13:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2022-07-22 00:13:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3632. [2022-07-22 00:13:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 2672 states have (on average 1.8577844311377245) internal successors, (4964), 3607 states have internal predecessors, (4964), 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) [2022-07-22 00:13:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 5014 transitions. [2022-07-22 00:13:13,712 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 5014 transitions. Word has length 36 [2022-07-22 00:13:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:13,713 INFO L495 AbstractCegarLoop]: Abstraction has 3632 states and 5014 transitions. [2022-07-22 00:13:13,713 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) [2022-07-22 00:13:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 5014 transitions. [2022-07-22 00:13:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:13:13,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:13,714 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] [2022-07-22 00:13:13,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:13,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-22 00:13:13,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:13,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809151934] [2022-07-22 00:13:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:13,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:13,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:13,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 00:13:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:13:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:14,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:14,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:14,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809151934] [2022-07-22 00:13:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809151934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:14,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942107886] [2022-07-22 00:13:14,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:14,316 INFO L87 Difference]: Start difference. First operand 3632 states and 5014 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) [2022-07-22 00:13:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:20,994 INFO L93 Difference]: Finished difference Result 6725 states and 8957 transitions. [2022-07-22 00:13:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:13:20,995 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 [2022-07-22 00:13:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:21,006 INFO L225 Difference]: With dead ends: 6725 [2022-07-22 00:13:21,007 INFO L226 Difference]: Without dead ends: 6725 [2022-07-22 00:13:21,007 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 [2022-07-22 00:13:21,008 INFO L413 NwaCegarLoop]: 2937 mSDtfsCounter, 3252 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 5833 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:21,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3256 Valid, 5833 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-07-22 00:13:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2022-07-22 00:13:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 3628. [2022-07-22 00:13:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 2672 states have (on average 1.8547904191616766) internal successors, (4956), 3603 states have internal predecessors, (4956), 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) [2022-07-22 00:13:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 5006 transitions. [2022-07-22 00:13:21,072 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 5006 transitions. Word has length 36 [2022-07-22 00:13:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:21,073 INFO L495 AbstractCegarLoop]: Abstraction has 3628 states and 5006 transitions. [2022-07-22 00:13:21,073 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) [2022-07-22 00:13:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 5006 transitions. [2022-07-22 00:13:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:13:21,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:21,074 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] [2022-07-22 00:13:21,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:21,285 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-22 00:13:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847435644] [2022-07-22 00:13:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:21,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:21,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:21,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 00:13:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:13:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:21,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:21,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:21,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847435644] [2022-07-22 00:13:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847435644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:21,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:21,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219254119] [2022-07-22 00:13:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:21,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:21,580 INFO L87 Difference]: Start difference. First operand 3628 states and 5006 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) [2022-07-22 00:13:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:26,990 INFO L93 Difference]: Finished difference Result 7477 states and 10068 transitions. [2022-07-22 00:13:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:13:26,991 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 [2022-07-22 00:13:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:27,003 INFO L225 Difference]: With dead ends: 7477 [2022-07-22 00:13:27,004 INFO L226 Difference]: Without dead ends: 7477 [2022-07-22 00:13:27,004 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 [2022-07-22 00:13:27,005 INFO L413 NwaCegarLoop]: 2542 mSDtfsCounter, 4861 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4871 SdHoareTripleChecker+Valid, 5133 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:27,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4871 Valid, 5133 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-22 00:13:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2022-07-22 00:13:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 3625. [2022-07-22 00:13:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.846556886227545) internal successors, (4934), 3600 states have internal predecessors, (4934), 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) [2022-07-22 00:13:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4984 transitions. [2022-07-22 00:13:27,071 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4984 transitions. Word has length 36 [2022-07-22 00:13:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:27,072 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4984 transitions. [2022-07-22 00:13:27,072 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) [2022-07-22 00:13:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4984 transitions. [2022-07-22 00:13:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 00:13:27,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:27,073 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] [2022-07-22 00:13:27,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:27,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-22 00:13:27,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:27,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793645130] [2022-07-22 00:13:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:27,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:27,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:27,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 00:13:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:13:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:27,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:27,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:27,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793645130] [2022-07-22 00:13:27,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793645130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:27,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:27,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736015493] [2022-07-22 00:13:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:27,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:27,631 INFO L87 Difference]: Start difference. First operand 3625 states and 4984 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) [2022-07-22 00:13:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:33,513 INFO L93 Difference]: Finished difference Result 5561 states and 7343 transitions. [2022-07-22 00:13:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 00:13:33,514 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 [2022-07-22 00:13:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:33,518 INFO L225 Difference]: With dead ends: 5561 [2022-07-22 00:13:33,519 INFO L226 Difference]: Without dead ends: 5561 [2022-07-22 00:13:33,519 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 [2022-07-22 00:13:33,519 INFO L413 NwaCegarLoop]: 2838 mSDtfsCounter, 2602 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:33,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 5307 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-22 00:13:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2022-07-22 00:13:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3625. [2022-07-22 00:13:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.843562874251497) internal successors, (4926), 3600 states have internal predecessors, (4926), 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) [2022-07-22 00:13:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4976 transitions. [2022-07-22 00:13:33,573 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4976 transitions. Word has length 36 [2022-07-22 00:13:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:33,574 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4976 transitions. [2022-07-22 00:13:33,574 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) [2022-07-22 00:13:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4976 transitions. [2022-07-22 00:13:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 00:13:33,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:33,575 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] [2022-07-22 00:13:33,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:33,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-22 00:13:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:33,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852560616] [2022-07-22 00:13:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:33,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:33,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:33,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:33,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 00:13:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:13:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:34,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:34,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852560616] [2022-07-22 00:13:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852560616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:34,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488778599] [2022-07-22 00:13:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:34,035 INFO L87 Difference]: Start difference. First operand 3625 states and 4976 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) [2022-07-22 00:13:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:34,094 INFO L93 Difference]: Finished difference Result 3613 states and 4952 transitions. [2022-07-22 00:13:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:34,095 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 [2022-07-22 00:13:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:34,099 INFO L225 Difference]: With dead ends: 3613 [2022-07-22 00:13:34,100 INFO L226 Difference]: Without dead ends: 3613 [2022-07-22 00:13:34,100 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 [2022-07-22 00:13:34,101 INFO L413 NwaCegarLoop]: 2193 mSDtfsCounter, 1152 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:34,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 5414 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:13:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-07-22 00:13:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3613. [2022-07-22 00:13:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 2660 states have (on average 1.8428571428571427) internal successors, (4902), 3588 states have internal predecessors, (4902), 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) [2022-07-22 00:13:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 4952 transitions. [2022-07-22 00:13:34,140 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 4952 transitions. Word has length 40 [2022-07-22 00:13:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:34,140 INFO L495 AbstractCegarLoop]: Abstraction has 3613 states and 4952 transitions. [2022-07-22 00:13:34,140 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) [2022-07-22 00:13:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 4952 transitions. [2022-07-22 00:13:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 00:13:34,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:34,141 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] [2022-07-22 00:13:34,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:34,351 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-22 00:13:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836018882] [2022-07-22 00:13:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:34,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:34,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:34,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 00:13:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:13:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:34,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:34,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836018882] [2022-07-22 00:13:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836018882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:34,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:34,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608148193] [2022-07-22 00:13:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:34,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:13:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:13:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:13:34,734 INFO L87 Difference]: Start difference. First operand 3613 states and 4952 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) [2022-07-22 00:13:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:34,977 INFO L93 Difference]: Finished difference Result 5433 states and 7161 transitions. [2022-07-22 00:13:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:13:34,978 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 [2022-07-22 00:13:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:34,984 INFO L225 Difference]: With dead ends: 5433 [2022-07-22 00:13:34,984 INFO L226 Difference]: Without dead ends: 5433 [2022-07-22 00:13:34,984 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 [2022-07-22 00:13:34,985 INFO L413 NwaCegarLoop]: 2282 mSDtfsCounter, 1568 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:34,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 4321 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:13:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-07-22 00:13:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4630. [2022-07-22 00:13:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 3670 states have (on average 1.8258855585831062) internal successors, (6701), 4595 states have internal predecessors, (6701), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 00:13:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 6771 transitions. [2022-07-22 00:13:35,052 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 6771 transitions. Word has length 48 [2022-07-22 00:13:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:35,052 INFO L495 AbstractCegarLoop]: Abstraction has 4630 states and 6771 transitions. [2022-07-22 00:13:35,052 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) [2022-07-22 00:13:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 6771 transitions. [2022-07-22 00:13:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 00:13:35,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:35,053 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] [2022-07-22 00:13:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:35,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:35,265 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-22 00:13:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:35,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153529323] [2022-07-22 00:13:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:35,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:35,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:35,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 00:13:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:13:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:35,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:35,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153529323] [2022-07-22 00:13:35,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153529323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:35,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:35,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:35,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071160641] [2022-07-22 00:13:35,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:35,624 INFO L87 Difference]: Start difference. First operand 4630 states and 6771 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) [2022-07-22 00:13:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:35,746 INFO L93 Difference]: Finished difference Result 5942 states and 8145 transitions. [2022-07-22 00:13:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:35,747 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 [2022-07-22 00:13:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:35,755 INFO L225 Difference]: With dead ends: 5942 [2022-07-22 00:13:35,756 INFO L226 Difference]: Without dead ends: 5942 [2022-07-22 00:13:35,756 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 [2022-07-22 00:13:35,757 INFO L413 NwaCegarLoop]: 3432 mSDtfsCounter, 2151 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 8347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:35,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 8347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:13:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2022-07-22 00:13:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4588. [2022-07-22 00:13:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 3628 states have (on average 1.8277287761852261) internal successors, (6631), 4553 states have internal predecessors, (6631), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 00:13:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6701 transitions. [2022-07-22 00:13:35,828 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6701 transitions. Word has length 51 [2022-07-22 00:13:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:35,829 INFO L495 AbstractCegarLoop]: Abstraction has 4588 states and 6701 transitions. [2022-07-22 00:13:35,829 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) [2022-07-22 00:13:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6701 transitions. [2022-07-22 00:13:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 00:13:35,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:35,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:13:35,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:36,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-22 00:13:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022809955] [2022-07-22 00:13:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:36,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:36,046 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:36,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 00:13:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:13:36,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:36,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:36,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022809955] [2022-07-22 00:13:36,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022809955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:36,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:36,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244339122] [2022-07-22 00:13:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:36,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:36,429 INFO L87 Difference]: Start difference. First operand 4588 states and 6701 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) [2022-07-22 00:13:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:36,495 INFO L93 Difference]: Finished difference Result 5678 states and 7631 transitions. [2022-07-22 00:13:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:36,496 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 [2022-07-22 00:13:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:36,504 INFO L225 Difference]: With dead ends: 5678 [2022-07-22 00:13:36,504 INFO L226 Difference]: Without dead ends: 5678 [2022-07-22 00:13:36,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:13:36,505 INFO L413 NwaCegarLoop]: 3694 mSDtfsCounter, 2142 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 8920 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:36,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 8920 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:13:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-07-22 00:13:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 4570. [2022-07-22 00:13:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 3610 states have (on average 1.8285318559556787) internal successors, (6601), 4535 states have internal predecessors, (6601), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 00:13:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 6671 transitions. [2022-07-22 00:13:36,569 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 6671 transitions. Word has length 54 [2022-07-22 00:13:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:36,570 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 6671 transitions. [2022-07-22 00:13:36,570 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) [2022-07-22 00:13:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 6671 transitions. [2022-07-22 00:13:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 00:13:36,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:36,571 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] [2022-07-22 00:13:36,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-22 00:13:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:36,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -345082942, now seen corresponding path program 1 times [2022-07-22 00:13:36,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:36,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716900973] [2022-07-22 00:13:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:36,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:36,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:36,788 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:36,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 00:13:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:13:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:37,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 00:13:37,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 00:13:37,217 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-22 00:13:37,217 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 [2022-07-22 00:13:37,267 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-22 00:13:37,267 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 [2022-07-22 00:13:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:37,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:37,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:37,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716900973] [2022-07-22 00:13:37,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716900973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:37,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:37,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:37,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116738556] [2022-07-22 00:13:37,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:37,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:37,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:37,308 INFO L87 Difference]: Start difference. First operand 4570 states and 6671 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) [2022-07-22 00:13:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:39,191 INFO L93 Difference]: Finished difference Result 4797 states and 6909 transitions. [2022-07-22 00:13:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:39,194 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 [2022-07-22 00:13:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:39,201 INFO L225 Difference]: With dead ends: 4797 [2022-07-22 00:13:39,201 INFO L226 Difference]: Without dead ends: 4797 [2022-07-22 00:13:39,201 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 [2022-07-22 00:13:39,202 INFO L413 NwaCegarLoop]: 2071 mSDtfsCounter, 1031 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 5369 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:39,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 5369 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 132 Unchecked, 1.8s Time] [2022-07-22 00:13:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2022-07-22 00:13:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4536. [2022-07-22 00:13:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 3576 states have (on average 1.8361297539149888) internal successors, (6566), 4501 states have internal predecessors, (6566), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 00:13:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 6636 transitions. [2022-07-22 00:13:39,255 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 6636 transitions. Word has length 57 [2022-07-22 00:13:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:39,256 INFO L495 AbstractCegarLoop]: Abstraction has 4536 states and 6636 transitions. [2022-07-22 00:13:39,256 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) [2022-07-22 00:13:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 6636 transitions. [2022-07-22 00:13:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 00:13:39,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:39,257 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] [2022-07-22 00:13:39,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:39,470 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-22 00:13:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:39,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469598015] [2022-07-22 00:13:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:39,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:39,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:39,473 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:39,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 00:13:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:13:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:39,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:39,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:39,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469598015] [2022-07-22 00:13:39,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469598015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:39,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523899238] [2022-07-22 00:13:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 00:13:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 00:13:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 00:13:39,965 INFO L87 Difference]: Start difference. First operand 4536 states and 6636 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) [2022-07-22 00:13:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:40,172 INFO L93 Difference]: Finished difference Result 6338 states and 8912 transitions. [2022-07-22 00:13:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 00:13:40,173 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 [2022-07-22 00:13:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:40,183 INFO L225 Difference]: With dead ends: 6338 [2022-07-22 00:13:40,183 INFO L226 Difference]: Without dead ends: 6338 [2022-07-22 00:13:40,183 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 [2022-07-22 00:13:40,186 INFO L413 NwaCegarLoop]: 2414 mSDtfsCounter, 1265 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 4482 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 [2022-07-22 00:13:40,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 4482 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:13:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2022-07-22 00:13:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 5609. [2022-07-22 00:13:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 4641 states have (on average 1.810385692738634) internal successors, (8402), 5563 states have internal predecessors, (8402), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:13:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8494 transitions. [2022-07-22 00:13:40,251 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8494 transitions. Word has length 59 [2022-07-22 00:13:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:40,251 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8494 transitions. [2022-07-22 00:13:40,251 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) [2022-07-22 00:13:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8494 transitions. [2022-07-22 00:13:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 00:13:40,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:40,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:13:40,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:40,452 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-22 00:13:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640838471] [2022-07-22 00:13:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:40,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:40,455 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:40,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-22 00:13:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 00:13:40,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:40,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:40,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 00:13:41,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 00:13:41,299 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 00:13:41,300 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 [2022-07-22 00:13:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:41,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:41,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640838471] [2022-07-22 00:13:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640838471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:41,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:41,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 00:13:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968890994] [2022-07-22 00:13:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:41,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:13:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:13:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:13:41,314 INFO L87 Difference]: Start difference. First operand 5609 states and 8494 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) [2022-07-22 00:13:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:46,032 INFO L93 Difference]: Finished difference Result 8028 states and 12217 transitions. [2022-07-22 00:13:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:13:46,033 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 [2022-07-22 00:13:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:46,045 INFO L225 Difference]: With dead ends: 8028 [2022-07-22 00:13:46,045 INFO L226 Difference]: Without dead ends: 8028 [2022-07-22 00:13:46,045 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 [2022-07-22 00:13:46,046 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 2474 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:46,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 1766 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-22 00:13:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2022-07-22 00:13:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 5369. [2022-07-22 00:13:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 4485 states have (on average 1.7438127090301003) internal successors, (7821), 5323 states have internal predecessors, (7821), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:13:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 7913 transitions. [2022-07-22 00:13:46,126 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 7913 transitions. Word has length 62 [2022-07-22 00:13:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:46,127 INFO L495 AbstractCegarLoop]: Abstraction has 5369 states and 7913 transitions. [2022-07-22 00:13:46,127 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) [2022-07-22 00:13:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 7913 transitions. [2022-07-22 00:13:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 00:13:46,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:46,128 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] [2022-07-22 00:13:46,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-22 00:13:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:46,329 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-22 00:13:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204953327] [2022-07-22 00:13:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:46,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:46,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 00:13:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:13:46,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:46,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:46,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:13:46,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-22 00:13:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:46,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:46,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204953327] [2022-07-22 00:13:46,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204953327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:46,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:46,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190501103] [2022-07-22 00:13:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:46,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:13:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:13:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:13:46,712 INFO L87 Difference]: Start difference. First operand 5369 states and 7913 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) [2022-07-22 00:13:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:50,670 INFO L93 Difference]: Finished difference Result 5368 states and 7910 transitions. [2022-07-22 00:13:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:13:50,670 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 [2022-07-22 00:13:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:50,678 INFO L225 Difference]: With dead ends: 5368 [2022-07-22 00:13:50,678 INFO L226 Difference]: Without dead ends: 5368 [2022-07-22 00:13:50,678 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 [2022-07-22 00:13:50,679 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 4 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:50,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5570 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 00:13:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-07-22 00:13:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-07-22 00:13:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4485 states have (on average 1.7431438127090302) internal successors, (7818), 5322 states have internal predecessors, (7818), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:13:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7910 transitions. [2022-07-22 00:13:50,747 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7910 transitions. Word has length 67 [2022-07-22 00:13:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:50,747 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7910 transitions. [2022-07-22 00:13:50,748 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) [2022-07-22 00:13:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7910 transitions. [2022-07-22 00:13:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 00:13:50,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:50,748 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] [2022-07-22 00:13:50,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:50,952 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-22 00:13:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:50,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309641037] [2022-07-22 00:13:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:50,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:50,955 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:13:50,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-22 00:13:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:13:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:51,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:51,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:13:51,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:13:51,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-22 00:13:51,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 00:13:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:51,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:51,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309641037] [2022-07-22 00:13:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309641037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:51,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:51,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:51,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109517603] [2022-07-22 00:13:51,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:13:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:13:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:13:51,379 INFO L87 Difference]: Start difference. First operand 5368 states and 7910 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) [2022-07-22 00:13:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:13:56,713 INFO L93 Difference]: Finished difference Result 5367 states and 7907 transitions. [2022-07-22 00:13:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:13:56,714 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 [2022-07-22 00:13:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:13:56,721 INFO L225 Difference]: With dead ends: 5367 [2022-07-22 00:13:56,721 INFO L226 Difference]: Without dead ends: 5367 [2022-07-22 00:13:56,721 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 [2022-07-22 00:13:56,722 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 2 mSDsluCounter, 3459 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:13:56,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5571 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-22 00:13:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-07-22 00:13:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5367. [2022-07-22 00:13:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 4482 states have (on average 1.7436412315930387) internal successors, (7815), 5321 states have internal predecessors, (7815), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:13:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7907 transitions. [2022-07-22 00:13:56,800 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7907 transitions. Word has length 67 [2022-07-22 00:13:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:13:56,801 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7907 transitions. [2022-07-22 00:13:56,801 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) [2022-07-22 00:13:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7907 transitions. [2022-07-22 00:13:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 00:13:56,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:13:56,806 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] [2022-07-22 00:13:56,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-22 00:13:57,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:13:57,010 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:13:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:13:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-22 00:13:57,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:13:57,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556532707] [2022-07-22 00:13:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:13:57,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:13:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:13:57,012 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) [2022-07-22 00:13:57,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-22 00:13:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:13:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:13:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:13:57,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:13:57,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:13:57,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-22 00:13:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:13:57,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:13:57,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:13:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556532707] [2022-07-22 00:13:57,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556532707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:13:57,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:13:57,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:13:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041634683] [2022-07-22 00:13:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:13:57,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:13:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:13:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:13:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:13:57,417 INFO L87 Difference]: Start difference. First operand 5367 states and 7907 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) [2022-07-22 00:14:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:01,135 INFO L93 Difference]: Finished difference Result 5366 states and 7903 transitions. [2022-07-22 00:14:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:14:01,136 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 [2022-07-22 00:14:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:01,145 INFO L225 Difference]: With dead ends: 5366 [2022-07-22 00:14:01,145 INFO L226 Difference]: Without dead ends: 5366 [2022-07-22 00:14:01,146 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 [2022-07-22 00:14:01,146 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 4 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5565 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:01,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5565 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-22 00:14:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-07-22 00:14:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 5366. [2022-07-22 00:14:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5366 states, 4482 states have (on average 1.7427487728692548) internal successors, (7811), 5320 states have internal predecessors, (7811), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:14:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5366 states to 5366 states and 7903 transitions. [2022-07-22 00:14:01,245 INFO L78 Accepts]: Start accepts. Automaton has 5366 states and 7903 transitions. Word has length 67 [2022-07-22 00:14:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:01,246 INFO L495 AbstractCegarLoop]: Abstraction has 5366 states and 7903 transitions. [2022-07-22 00:14:01,246 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) [2022-07-22 00:14:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5366 states and 7903 transitions. [2022-07-22 00:14:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 00:14:01,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:01,247 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] [2022-07-22 00:14:01,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:01,455 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-22 00:14:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:01,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872980232] [2022-07-22 00:14:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:14:01,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:01,458 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 00:14:01,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-22 00:14:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:14:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 00:14:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:01,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:14:01,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:14:01,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:14:01,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-22 00:14:01,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 00:14:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:01,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:14:01,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872980232] [2022-07-22 00:14:01,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872980232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:14:01,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:14:01,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:14:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388184768] [2022-07-22 00:14:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:14:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:14:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:14:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:14:01,883 INFO L87 Difference]: Start difference. First operand 5366 states and 7903 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) [2022-07-22 00:14:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:07,439 INFO L93 Difference]: Finished difference Result 5365 states and 7899 transitions. [2022-07-22 00:14:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:14:07,440 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 [2022-07-22 00:14:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:07,446 INFO L225 Difference]: With dead ends: 5365 [2022-07-22 00:14:07,446 INFO L226 Difference]: Without dead ends: 5365 [2022-07-22 00:14:07,447 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 [2022-07-22 00:14:07,447 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 2 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:07,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5566 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 00:14:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2022-07-22 00:14:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 5365. [2022-07-22 00:14:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5365 states, 4478 states have (on average 1.7434122376060741) internal successors, (7807), 5319 states have internal predecessors, (7807), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-22 00:14:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 7899 transitions. [2022-07-22 00:14:07,507 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 7899 transitions. Word has length 67 [2022-07-22 00:14:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:07,508 INFO L495 AbstractCegarLoop]: Abstraction has 5365 states and 7899 transitions. [2022-07-22 00:14:07,508 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) [2022-07-22 00:14:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 7899 transitions. [2022-07-22 00:14:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 00:14:07,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:07,509 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] [2022-07-22 00:14:07,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:07,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:07,725 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1243544783, now seen corresponding path program 1 times [2022-07-22 00:14:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:07,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627971690] [2022-07-22 00:14:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:14:07,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:07,727 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) [2022-07-22 00:14:07,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-22 00:14:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:14:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 00:14:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:08,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:14:08,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627971690] [2022-07-22 00:14:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627971690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:14:08,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:14:08,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:14:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939282466] [2022-07-22 00:14:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:14:08,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 00:14:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 00:14:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 00:14:08,136 INFO L87 Difference]: Start difference. First operand 5365 states and 7899 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) [2022-07-22 00:14:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:08,213 INFO L93 Difference]: Finished difference Result 5368 states and 7908 transitions. [2022-07-22 00:14:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 00:14:08,214 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 [2022-07-22 00:14:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:08,240 INFO L225 Difference]: With dead ends: 5368 [2022-07-22 00:14:08,240 INFO L226 Difference]: Without dead ends: 5368 [2022-07-22 00:14:08,241 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 [2022-07-22 00:14:08,247 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 2 mSDsluCounter, 4210 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6319 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 [2022-07-22 00:14:08,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6319 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:14:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-07-22 00:14:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-07-22 00:14:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4480 states have (on average 1.7433035714285714) internal successors, (7810), 5322 states have internal predecessors, (7810), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-22 00:14:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7908 transitions. [2022-07-22 00:14:08,324 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7908 transitions. Word has length 75 [2022-07-22 00:14:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:08,325 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7908 transitions. [2022-07-22 00:14:08,325 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) [2022-07-22 00:14:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7908 transitions. [2022-07-22 00:14:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 00:14:08,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:08,325 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] [2022-07-22 00:14:08,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-22 00:14:08,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:08,526 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1194961360, now seen corresponding path program 1 times [2022-07-22 00:14:08,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022884877] [2022-07-22 00:14:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:14:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:08,544 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) [2022-07-22 00:14:08,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-22 00:14:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:14:08,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:14:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:14:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:08,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022884877] [2022-07-22 00:14:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022884877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:14:08,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:14:08,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 00:14:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795177410] [2022-07-22 00:14:08,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:14:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 00:14:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 00:14:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 00:14:08,997 INFO L87 Difference]: Start difference. First operand 5368 states and 7908 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) [2022-07-22 00:14:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:09,206 INFO L93 Difference]: Finished difference Result 5380 states and 7930 transitions. [2022-07-22 00:14:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 00:14:09,207 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 [2022-07-22 00:14:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:09,225 INFO L225 Difference]: With dead ends: 5380 [2022-07-22 00:14:09,225 INFO L226 Difference]: Without dead ends: 5380 [2022-07-22 00:14:09,225 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 [2022-07-22 00:14:09,226 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 12 mSDsluCounter, 12611 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14720 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:09,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14720 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:14:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-07-22 00:14:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 5378. [2022-07-22 00:14:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 4489 states have (on average 1.7431499220316329) internal successors, (7825), 5331 states have internal predecessors, (7825), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-22 00:14:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7923 transitions. [2022-07-22 00:14:09,302 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7923 transitions. Word has length 76 [2022-07-22 00:14:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:09,303 INFO L495 AbstractCegarLoop]: Abstraction has 5378 states and 7923 transitions. [2022-07-22 00:14:09,303 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) [2022-07-22 00:14:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7923 transitions. [2022-07-22 00:14:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 00:14:09,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:09,304 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] [2022-07-22 00:14:09,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:09,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:09,520 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1708838159, now seen corresponding path program 2 times [2022-07-22 00:14:09,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:09,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257034108] [2022-07-22 00:14:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:14:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:09,523 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) [2022-07-22 00:14:09,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-22 00:14:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:14:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:14:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 00:14:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:10,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:14:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:10,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257034108] [2022-07-22 00:14:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257034108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:14:10,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:14:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-22 00:14:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451851321] [2022-07-22 00:14:10,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:14:10,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 00:14:10,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 00:14:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-22 00:14:10,472 INFO L87 Difference]: Start difference. First operand 5378 states and 7923 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) [2022-07-22 00:14:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:11,136 INFO L93 Difference]: Finished difference Result 5399 states and 7971 transitions. [2022-07-22 00:14:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 00:14:11,137 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 [2022-07-22 00:14:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:11,149 INFO L225 Difference]: With dead ends: 5399 [2022-07-22 00:14:11,149 INFO L226 Difference]: Without dead ends: 5395 [2022-07-22 00:14:11,150 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 [2022-07-22 00:14:11,150 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 56 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 18951 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:11,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 18951 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:14:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-07-22 00:14:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5387. [2022-07-22 00:14:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 4498 states have (on average 1.7423299244108492) internal successors, (7837), 5340 states have internal predecessors, (7837), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-22 00:14:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 7935 transitions. [2022-07-22 00:14:11,260 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 7935 transitions. Word has length 79 [2022-07-22 00:14:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:11,261 INFO L495 AbstractCegarLoop]: Abstraction has 5387 states and 7935 transitions. [2022-07-22 00:14:11,261 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) [2022-07-22 00:14:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 7935 transitions. [2022-07-22 00:14:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 00:14:11,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:11,262 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] [2022-07-22 00:14:11,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:11,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:11,479 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1472099985, now seen corresponding path program 3 times [2022-07-22 00:14:11,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:11,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296403961] [2022-07-22 00:14:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:14:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:11,482 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) [2022-07-22 00:14:11,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-22 00:14:12,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 00:14:12,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:14:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 00:14:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:12,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:14:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:13,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296403961] [2022-07-22 00:14:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296403961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:14:13,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:14:13,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-22 00:14:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019948485] [2022-07-22 00:14:13,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:14:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 00:14:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 00:14:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-22 00:14:13,107 INFO L87 Difference]: Start difference. First operand 5387 states and 7935 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) [2022-07-22 00:14:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:16,433 INFO L93 Difference]: Finished difference Result 5429 states and 8072 transitions. [2022-07-22 00:14:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 00:14:16,435 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 [2022-07-22 00:14:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:16,445 INFO L225 Difference]: With dead ends: 5429 [2022-07-22 00:14:16,445 INFO L226 Difference]: Without dead ends: 5423 [2022-07-22 00:14:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 00:14:16,447 INFO L413 NwaCegarLoop]: 2116 mSDtfsCounter, 189 mSDsluCounter, 23219 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 25335 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:16,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 25335 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 00:14:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2022-07-22 00:14:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 5405. [2022-07-22 00:14:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4516 states have (on average 1.7404782993799823) internal successors, (7860), 5358 states have internal predecessors, (7860), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-22 00:14:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 7958 transitions. [2022-07-22 00:14:16,523 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 7958 transitions. Word has length 85 [2022-07-22 00:14:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:16,524 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 7958 transitions. [2022-07-22 00:14:16,524 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) [2022-07-22 00:14:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 7958 transitions. [2022-07-22 00:14:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 00:14:16,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:16,525 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] [2022-07-22 00:14:16,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:16,741 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1934666287, now seen corresponding path program 4 times [2022-07-22 00:14:16,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:16,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940635985] [2022-07-22 00:14:16,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:14:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:16,744 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) [2022-07-22 00:14:16,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-22 00:14:17,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:14:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:14:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 00:14:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:17,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:14:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:14:18,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:18,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940635985] [2022-07-22 00:14:18,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940635985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:14:18,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:14:18,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-22 00:14:18,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239698535] [2022-07-22 00:14:18,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:14:18,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 00:14:18,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:14:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 00:14:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 00:14:18,990 INFO L87 Difference]: Start difference. First operand 5405 states and 7958 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) [2022-07-22 00:14:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:14:32,006 INFO L93 Difference]: Finished difference Result 5485 states and 8175 transitions. [2022-07-22 00:14:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-22 00:14:32,008 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 [2022-07-22 00:14:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:14:32,021 INFO L225 Difference]: With dead ends: 5485 [2022-07-22 00:14:32,021 INFO L226 Difference]: Without dead ends: 5481 [2022-07-22 00:14:32,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-22 00:14:32,026 INFO L413 NwaCegarLoop]: 2129 mSDtfsCounter, 406 mSDsluCounter, 48856 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 50985 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:14:32,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 50985 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 00:14:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2022-07-22 00:14:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5439. [2022-07-22 00:14:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 4550 states have (on average 1.7375824175824175) internal successors, (7906), 5392 states have internal predecessors, (7906), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-22 00:14:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 8004 transitions. [2022-07-22 00:14:32,108 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 8004 transitions. Word has length 97 [2022-07-22 00:14:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:14:32,109 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 8004 transitions. [2022-07-22 00:14:32,109 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) [2022-07-22 00:14:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 8004 transitions. [2022-07-22 00:14:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 00:14:32,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:14:32,112 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] [2022-07-22 00:14:32,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-22 00:14:32,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 00:14:32,331 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-22 00:14:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:14:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1997795441, now seen corresponding path program 5 times [2022-07-22 00:14:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 00:14:32,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251444740] [2022-07-22 00:14:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:14:32,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 00:14:32,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 00:14:32,335 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) [2022-07-22 00:14:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-22 00:14:33,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-22 00:14:33,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:14:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 00:14:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:14:34,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:14:34,135 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-22 00:14:34,135 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 [2022-07-22 00:14:34,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:14:34,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 00:14:35,711 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:14:35,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-22 00:14:35,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-22 00:14:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-22 00:14:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:14:36,006 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 [2022-07-22 00:14:36,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 00:14:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251444740] [2022-07-22 00:14:36,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251444740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:14:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [293417342] [2022-07-22 00:14:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:14:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 00:14:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 00:14:36,011 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) [2022-07-22 00:14:36,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-22 00:16:11,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-22 00:16:11,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:16:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-22 00:16:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:16:12,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 00:16:12,248 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-22 00:16:12,249 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 [2022-07-22 00:16:12,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 00:16:12,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 00:16:13,754 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 00:16:13,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-22 00:16:13,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-22 00:16:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-22 00:16:13,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:16:14,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [293417342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:16:14,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 00:16:14,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 00:16:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890508982] [2022-07-22 00:16:14,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 00:16:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 00:16:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 00:16:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 00:16:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=93, Unknown=12, NotChecked=20, Total=156 [2022-07-22 00:16:14,095 INFO L87 Difference]: Start difference. First operand 5439 states and 8004 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)