./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/ldv-memsafety/memleaks_test12-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:08:33,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:08:33,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:08:33,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:08:33,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:08:33,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:08:33,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:08:33,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:08:33,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:08:33,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:08:33,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:08:33,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:08:33,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:08:33,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:08:33,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:08:33,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:08:33,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:08:33,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:08:33,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:08:33,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:08:33,234 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:08:33,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:08:33,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:08:33,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:08:33,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:08:33,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:08:33,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:08:33,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:08:33,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:08:33,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:08:33,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:08:33,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:08:33,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:08:33,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:08:33,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:08:33,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:08:33,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:08:33,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:08:33,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:08:33,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:08:33,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:08:33,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:08:33,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:08:33,286 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:08:33,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:08:33,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:08:33,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:08:33,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:08:33,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:08:33,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:08:33,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:08:33,290 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:08:33,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:08:33,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:08:33,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:08:33,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:08:33,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:08:33,292 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:08:33,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:08:33,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:08:33,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:08:33,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:08:33,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:08:33,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:08:33,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:08:33,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:08:33,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:08:33,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:08:33,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-07-23 06:08:33,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:08:33,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:08:33,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:08:33,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:08:33,587 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:08:33,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-07-23 06:08:33,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd854a313/ddb98cb6e8214dfbb5f60daaaad45472/FLAG6e4e0a83d [2022-07-23 06:08:34,140 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:08:34,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-07-23 06:08:34,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd854a313/ddb98cb6e8214dfbb5f60daaaad45472/FLAG6e4e0a83d [2022-07-23 06:08:34,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd854a313/ddb98cb6e8214dfbb5f60daaaad45472 [2022-07-23 06:08:34,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:08:34,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:08:34,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:08:34,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:08:34,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:08:34,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:08:34" (1/1) ... [2022-07-23 06:08:34,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4133a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:34, skipping insertion in model container [2022-07-23 06:08:34,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:08:34" (1/1) ... [2022-07-23 06:08:34,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:08:34,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:08:34,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:08:34,971 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) [2022-07-23 06:08:34,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d8f5c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:34, skipping insertion in model container [2022-07-23 06:08:34,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:08:34,973 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:08:34,976 INFO L158 Benchmark]: Toolchain (without parser) took 501.15ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 51.7MB in the beginning and 80.0MB in the end (delta: -28.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 06:08:34,977 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory was 56.9MB in the beginning and 56.9MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:08:34,978 INFO L158 Benchmark]: CACSL2BoogieTranslator took 495.34ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 51.4MB in the beginning and 80.0MB in the end (delta: -28.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 06:08:34,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory was 56.9MB in the beginning and 56.9MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 495.34ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 51.4MB in the beginning and 80.0MB in the end (delta: -28.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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/ldv-memsafety/memleaks_test12-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:08:36,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:08:36,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:08:36,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:08:36,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:08:36,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:08:36,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:08:36,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:08:36,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:08:36,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:08:36,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:08:36,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:08:36,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:08:36,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:08:36,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:08:36,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:08:36,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:08:36,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:08:36,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:08:36,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:08:36,937 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:08:36,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:08:36,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:08:36,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:08:36,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:08:36,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:08:36,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:08:36,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:08:36,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:08:36,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:08:36,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:08:36,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:08:36,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:08:36,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:08:36,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:08:36,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:08:36,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:08:36,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:08:36,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:08:36,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:08:36,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:08:36,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:08:36,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:08:36,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:08:36,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:08:36,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:08:36,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:08:36,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:08:36,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:08:36,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:08:36,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:08:37,000 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:08:37,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:08:37,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:08:37,002 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:08:37,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:08:37,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:08:37,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:08:37,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:08:37,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:08:37,003 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:08:37,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:08:37,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:08:37,004 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:08:37,004 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:08:37,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:08:37,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:08:37,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:08:37,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:08:37,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:08:37,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:08:37,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:08:37,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:08:37,006 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:08:37,006 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:08:37,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:08:37,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-07-23 06:08:37,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:08:37,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:08:37,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:08:37,374 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:08:37,375 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:08:37,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-07-23 06:08:37,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c4013c/669ad68be6764dedbaee7f781eb6e2df/FLAG4339faddb [2022-07-23 06:08:37,986 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:08:37,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-07-23 06:08:38,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c4013c/669ad68be6764dedbaee7f781eb6e2df/FLAG4339faddb [2022-07-23 06:08:38,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c4013c/669ad68be6764dedbaee7f781eb6e2df [2022-07-23 06:08:38,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:08:38,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:08:38,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:08:38,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:08:38,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:08:38,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:08:38" (1/1) ... [2022-07-23 06:08:38,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddd7e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:38, skipping insertion in model container [2022-07-23 06:08:38,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:08:38" (1/1) ... [2022-07-23 06:08:38,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:08:38,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:08:38,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:08:38,823 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:08:38,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:08:38,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:08:38,917 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:08:38,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:08:39,035 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:08:39,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39 WrapperNode [2022-07-23 06:08:39,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:08:39,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:08:39,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:08:39,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:08:39,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,113 INFO L137 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2022-07-23 06:08:39,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:08:39,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:08:39,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:08:39,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:08:39,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:08:39,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:08:39,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:08:39,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:08:39,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (1/1) ... [2022-07-23 06:08:39,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:08:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:08:39,257 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) [2022-07-23 06:08:39,267 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 [2022-07-23 06:08:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 06:08:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 06:08:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-23 06:08:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-23 06:08:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-23 06:08:39,299 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-23 06:08:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-07-23 06:08:39,301 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-23 06:08:39,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 06:08:39,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:08:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-07-23 06:08:39,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-07-23 06:08:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:08:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-07-23 06:08:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:08:39,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:08:39,495 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:08:39,497 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:08:39,501 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-23 06:08:40,841 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:08:40,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:08:40,860 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 06:08:40,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:08:40 BoogieIcfgContainer [2022-07-23 06:08:40,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:08:40,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:08:40,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:08:40,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:08:40,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:08:38" (1/3) ... [2022-07-23 06:08:40,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5a08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:08:40, skipping insertion in model container [2022-07-23 06:08:40,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:08:39" (2/3) ... [2022-07-23 06:08:40,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5a08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:08:40, skipping insertion in model container [2022-07-23 06:08:40,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:08:40" (3/3) ... [2022-07-23 06:08:40,873 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2022-07-23 06:08:40,884 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:08:40,884 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-07-23 06:08:40,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:08:40,935 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@62e9c780, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4210c848 [2022-07-23 06:08:40,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-07-23 06:08:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-23 06:08:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:08:40,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:40,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:40,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-07-23 06:08:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118303952] [2022-07-23 06:08:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:40,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:40,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:40,969 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) [2022-07-23 06:08:41,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:08:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:08:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:41,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:41,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:41,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118303952] [2022-07-23 06:08:41,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118303952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:41,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:08:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623369139] [2022-07-23 06:08:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:41,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:08:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:08:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:08:41,359 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:08:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:42,395 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-07-23 06:08:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:08:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-07-23 06:08:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:42,412 INFO L225 Difference]: With dead ends: 412 [2022-07-23 06:08:42,412 INFO L226 Difference]: Without dead ends: 408 [2022-07-23 06:08:42,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:42,421 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:42,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 522 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 06:08:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-07-23 06:08:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-07-23 06:08:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-23 06:08:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-07-23 06:08:42,532 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-07-23 06:08:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:42,532 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-07-23 06:08:42,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:08:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-07-23 06:08:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:08:42,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:42,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:42,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-23 06:08:42,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:42,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:42,748 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-07-23 06:08:42,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:42,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112404831] [2022-07-23 06:08:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:42,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:42,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:42,753 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) [2022-07-23 06:08:42,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:08:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:08:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:42,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:42,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112404831] [2022-07-23 06:08:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112404831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:42,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:42,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:08:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994022842] [2022-07-23 06:08:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:42,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:08:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:08:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:08:42,977 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:08:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:43,840 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-07-23 06:08:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:08:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-07-23 06:08:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:43,844 INFO L225 Difference]: With dead ends: 476 [2022-07-23 06:08:43,844 INFO L226 Difference]: Without dead ends: 476 [2022-07-23 06:08:43,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:43,845 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:43,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 849 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:08:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-23 06:08:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-07-23 06:08:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-23 06:08:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-07-23 06:08:43,866 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-07-23 06:08:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:43,866 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-07-23 06:08:43,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:08:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-07-23 06:08:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:08:43,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:43,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:43,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-23 06:08:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:44,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-07-23 06:08:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:44,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017523765] [2022-07-23 06:08:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:44,080 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) [2022-07-23 06:08:44,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:08:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:08:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:44,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:44,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:44,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017523765] [2022-07-23 06:08:44,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017523765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:44,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:44,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:08:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470314766] [2022-07-23 06:08:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:44,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:08:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:08:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:44,190 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-23 06:08:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:44,340 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-07-23 06:08:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:08:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-07-23 06:08:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:44,345 INFO L225 Difference]: With dead ends: 649 [2022-07-23 06:08:44,346 INFO L226 Difference]: Without dead ends: 649 [2022-07-23 06:08:44,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:44,347 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:44,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1486 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:08:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-07-23 06:08:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-07-23 06:08:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-07-23 06:08:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-07-23 06:08:44,369 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-07-23 06:08:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:44,369 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-07-23 06:08:44,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-23 06:08:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-07-23 06:08:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:08:44,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:44,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:44,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:44,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-07-23 06:08:44,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:44,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079690147] [2022-07-23 06:08:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:44,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:44,583 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) [2022-07-23 06:08:44,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:08:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:08:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:44,795 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 15 treesize of output 7 [2022-07-23 06:08:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:44,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:44,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:44,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079690147] [2022-07-23 06:08:44,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079690147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:44,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:44,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:08:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8535906] [2022-07-23 06:08:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:44,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:08:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:08:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:08:44,823 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-23 06:08:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:45,893 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-07-23 06:08:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:08:45,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-07-23 06:08:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:45,897 INFO L225 Difference]: With dead ends: 436 [2022-07-23 06:08:45,897 INFO L226 Difference]: Without dead ends: 436 [2022-07-23 06:08:45,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:08:45,898 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 59 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:45,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 06:08:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-07-23 06:08:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-07-23 06:08:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-07-23 06:08:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-07-23 06:08:45,914 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-07-23 06:08:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:45,915 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-07-23 06:08:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-23 06:08:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-07-23 06:08:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:08:45,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:45,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:45,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:46,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:46,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-07-23 06:08:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298391658] [2022-07-23 06:08:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:46,136 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) [2022-07-23 06:08:46,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:08:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:08:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:46,374 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 15 treesize of output 7 [2022-07-23 06:08:46,393 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 15 treesize of output 7 [2022-07-23 06:08:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:46,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:46,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298391658] [2022-07-23 06:08:46,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298391658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:46,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:46,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:08:46,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65012314] [2022-07-23 06:08:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:08:46,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:08:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:08:46,433 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-23 06:08:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:47,650 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-07-23 06:08:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:08:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-07-23 06:08:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:47,654 INFO L225 Difference]: With dead ends: 424 [2022-07-23 06:08:47,654 INFO L226 Difference]: Without dead ends: 424 [2022-07-23 06:08:47,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:08:47,655 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 33 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:47,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1291 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 06:08:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-23 06:08:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-07-23 06:08:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-07-23 06:08:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-07-23 06:08:47,669 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-07-23 06:08:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:47,669 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-07-23 06:08:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-23 06:08:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-07-23 06:08:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:08:47,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:47,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:47,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:47,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-07-23 06:08:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:47,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329214133] [2022-07-23 06:08:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:47,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:47,883 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) [2022-07-23 06:08:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:08:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:08:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:48,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:48,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329214133] [2022-07-23 06:08:48,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329214133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:48,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:48,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:08:48,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077450092] [2022-07-23 06:08:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:48,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:08:48,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:08:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,011 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:08:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:48,085 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-07-23 06:08:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:08:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-23 06:08:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:48,089 INFO L225 Difference]: With dead ends: 351 [2022-07-23 06:08:48,089 INFO L226 Difference]: Without dead ends: 351 [2022-07-23 06:08:48,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,090 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:48,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1342 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:08:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-23 06:08:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-07-23 06:08:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-23 06:08:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-07-23 06:08:48,103 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-07-23 06:08:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:48,104 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-07-23 06:08:48,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:08:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-07-23 06:08:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:08:48,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:48,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:48,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-23 06:08:48,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:48,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-07-23 06:08:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:48,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682028091] [2022-07-23 06:08:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:48,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:48,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:48,317 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) [2022-07-23 06:08:48,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:08:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:08:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:08:48,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:08:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:08:48,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682028091] [2022-07-23 06:08:48,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682028091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:08:48,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:08:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:08:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601600991] [2022-07-23 06:08:48,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:08:48,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:08:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:08:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,454 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:08:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:48,537 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-07-23 06:08:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:08:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-23 06:08:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:48,539 INFO L225 Difference]: With dead ends: 344 [2022-07-23 06:08:48,539 INFO L226 Difference]: Without dead ends: 344 [2022-07-23 06:08:48,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,541 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:48,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1052 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:08:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-23 06:08:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-07-23 06:08:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-23 06:08:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-07-23 06:08:48,554 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-07-23 06:08:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:48,555 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-07-23 06:08:48,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:08:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-07-23 06:08:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:08:48,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:48,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:48,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:48,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-07-23 06:08:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:48,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697709668] [2022-07-23 06:08:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:48,769 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) [2022-07-23 06:08:48,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:08:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:08:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:08:48,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:08:48,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:48,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697709668] [2022-07-23 06:08:48,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697709668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:08:48,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:08:48,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:08:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907633961] [2022-07-23 06:08:48,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:08:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:08:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:08:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,895 INFO L87 Difference]: Start difference. First operand 344 states and 386 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:08:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:48,956 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-07-23 06:08:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:08:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-23 06:08:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:48,962 INFO L225 Difference]: With dead ends: 388 [2022-07-23 06:08:48,962 INFO L226 Difference]: Without dead ends: 388 [2022-07-23 06:08:48,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:08:48,963 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:48,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1375 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:08:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-23 06:08:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-07-23 06:08:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-23 06:08:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-07-23 06:08:48,978 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-07-23 06:08:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:48,978 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-07-23 06:08:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:08:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-07-23 06:08:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:08:48,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:48,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:48,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:49,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:49,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-07-23 06:08:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738359381] [2022-07-23 06:08:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:49,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:49,195 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) [2022-07-23 06:08:49,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:08:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:08:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:49,286 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 [2022-07-23 06:08:49,404 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:08:49,405 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 [2022-07-23 06:08:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:49,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:08:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:49,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:49,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738359381] [2022-07-23 06:08:49,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738359381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:08:49,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:08:49,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-23 06:08:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090306193] [2022-07-23 06:08:49,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:08:49,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:08:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:08:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:08:49,586 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:08:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:08:50,188 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-07-23 06:08:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:08:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2022-07-23 06:08:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:08:50,191 INFO L225 Difference]: With dead ends: 353 [2022-07-23 06:08:50,191 INFO L226 Difference]: Without dead ends: 353 [2022-07-23 06:08:50,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:08:50,192 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:08:50,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2022-07-23 06:08:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-23 06:08:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2022-07-23 06:08:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 324 states have internal predecessors, (357), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-23 06:08:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2022-07-23 06:08:50,199 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2022-07-23 06:08:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:08:50,199 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2022-07-23 06:08:50,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:08:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2022-07-23 06:08:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 06:08:50,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:08:50,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:08:50,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:08:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:08:50,411 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:08:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:08:50,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-07-23 06:08:50,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:08:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749064203] [2022-07-23 06:08:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:50,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:08:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:08:50,414 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) [2022-07-23 06:08:50,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:08:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:50,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:08:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:50,520 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 [2022-07-23 06:08:50,526 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 [2022-07-23 06:08:50,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:08:50,681 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 [2022-07-23 06:08:50,692 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:08:50,693 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 [2022-07-23 06:08:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:50,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:08:55,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:08:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749064203] [2022-07-23 06:08:55,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749064203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:08:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1648859374] [2022-07-23 06:08:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:08:55,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:08:55,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:08:55,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:08:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-23 06:08:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:08:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:08:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:08:55,931 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 [2022-07-23 06:08:55,936 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 [2022-07-23 06:08:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:08:56,029 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 [2022-07-23 06:08:56,039 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:08:56,040 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 [2022-07-23 06:08:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:08:56,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:08:58,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1648859374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:08:58,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:08:58,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 06:08:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50125304] [2022-07-23 06:08:58,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:08:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:08:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:08:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:08:58,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-23 06:08:58,229 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:00,821 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2022-07-23 06:09:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:09:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-07-23 06:09:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:00,824 INFO L225 Difference]: With dead ends: 634 [2022-07-23 06:09:00,824 INFO L226 Difference]: Without dead ends: 634 [2022-07-23 06:09:00,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2022-07-23 06:09:00,825 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 328 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:00,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1299 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1397 Invalid, 0 Unknown, 318 Unchecked, 2.5s Time] [2022-07-23 06:09:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-07-23 06:09:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2022-07-23 06:09:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 216 states have (on average 1.7222222222222223) internal successors, (372), 335 states have internal predecessors, (372), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-07-23 06:09:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2022-07-23 06:09:00,838 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2022-07-23 06:09:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:00,838 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2022-07-23 06:09:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2022-07-23 06:09:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:09:00,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:00,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:00,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:01,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-07-23 06:09:01,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:01,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-07-23 06:09:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873203374] [2022-07-23 06:09:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:01,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:01,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:01,251 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) [2022-07-23 06:09:01,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:09:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:09:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:09:01,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:01,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873203374] [2022-07-23 06:09:01,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873203374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:09:01,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:01,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:09:01,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072406400] [2022-07-23 06:09:01,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:01,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:09:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:09:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:09:01,611 INFO L87 Difference]: Start difference. First operand 364 states and 420 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:09:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:02,190 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2022-07-23 06:09:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:09:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2022-07-23 06:09:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:02,193 INFO L225 Difference]: With dead ends: 367 [2022-07-23 06:09:02,193 INFO L226 Difference]: Without dead ends: 367 [2022-07-23 06:09:02,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:09:02,194 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 578 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:02,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1332 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-07-23 06:09:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-23 06:09:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2022-07-23 06:09:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 216 states have (on average 1.712962962962963) internal successors, (370), 334 states have internal predecessors, (370), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-07-23 06:09:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2022-07-23 06:09:02,206 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2022-07-23 06:09:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:02,207 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2022-07-23 06:09:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:09:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2022-07-23 06:09:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:09:02,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:02,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:02,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:02,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:02,422 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-07-23 06:09:02,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:02,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667306870] [2022-07-23 06:09:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:02,425 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) [2022-07-23 06:09:02,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:09:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:09:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:09:02,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:02,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667306870] [2022-07-23 06:09:02,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667306870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:02,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:02,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:09:02,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029277844] [2022-07-23 06:09:02,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:09:02,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:02,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:09:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:09:02,538 INFO L87 Difference]: Start difference. First operand 363 states and 418 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-07-23 06:09:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:03,273 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2022-07-23 06:09:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:09:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 18 [2022-07-23 06:09:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:03,276 INFO L225 Difference]: With dead ends: 366 [2022-07-23 06:09:03,276 INFO L226 Difference]: Without dead ends: 353 [2022-07-23 06:09:03,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:09:03,277 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:03,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 06:09:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-23 06:09:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-07-23 06:09:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7391304347826086) internal successors, (360), 325 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-07-23 06:09:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2022-07-23 06:09:03,286 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2022-07-23 06:09:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:03,286 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2022-07-23 06:09:03,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-07-23 06:09:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2022-07-23 06:09:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 06:09:03,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:03,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:03,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:03,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-07-23 06:09:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820378346] [2022-07-23 06:09:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:03,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:03,499 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) [2022-07-23 06:09:03,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:09:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:09:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:03,683 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:09:03,683 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 [2022-07-23 06:09:03,802 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 14 treesize of output 16 [2022-07-23 06:09:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:03,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:03,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820378346] [2022-07-23 06:09:03,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820378346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590536818] [2022-07-23 06:09:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:03,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:03,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:09:03,886 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:09:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-23 06:09:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:09:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:04,024 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 9 treesize of output 3 [2022-07-23 06:09:04,087 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:09:04,087 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 [2022-07-23 06:09:04,162 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 14 treesize of output 16 [2022-07-23 06:09:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:04,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:04,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [590536818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:04,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:04,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-23 06:09:04,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555269289] [2022-07-23 06:09:04,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:04,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:09:04,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:09:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:09:04,213 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:04,937 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2022-07-23 06:09:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:09:04,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-23 06:09:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:04,939 INFO L225 Difference]: With dead ends: 403 [2022-07-23 06:09:04,939 INFO L226 Difference]: Without dead ends: 403 [2022-07-23 06:09:04,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:09:04,940 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 99 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:04,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 936 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 345 Invalid, 0 Unknown, 185 Unchecked, 0.7s Time] [2022-07-23 06:09:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-07-23 06:09:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2022-07-23 06:09:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 212 states have (on average 1.7264150943396226) internal successors, (366), 330 states have internal predecessors, (366), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-07-23 06:09:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-07-23 06:09:04,949 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2022-07-23 06:09:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:04,949 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-07-23 06:09:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-07-23 06:09:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 06:09:04,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:04,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:04,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:05,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:05,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-07-23 06:09:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132606909] [2022-07-23 06:09:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:05,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:05,363 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) [2022-07-23 06:09:05,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 06:09:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:09:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:07,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:09:07,556 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 [2022-07-23 06:09:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:09:09,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:10,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132606909] [2022-07-23 06:09:10,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132606909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548420220] [2022-07-23 06:09:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:09:10,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:09:10,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-23 06:09:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:09:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:10,482 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 9 treesize of output 3 [2022-07-23 06:09:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:09:12,584 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 [2022-07-23 06:09:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:09:12,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1548420220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:17,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:17,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-23 06:09:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292956476] [2022-07-23 06:09:17,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:17,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:09:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:09:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2022-07-23 06:09:17,211 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:22,219 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2022-07-23 06:09:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:09:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-23 06:09:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:22,222 INFO L225 Difference]: With dead ends: 449 [2022-07-23 06:09:22,222 INFO L226 Difference]: Without dead ends: 449 [2022-07-23 06:09:22,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=60, Invalid=118, Unknown=4, NotChecked=0, Total=182 [2022-07-23 06:09:22,223 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:22,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1095 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 499 Invalid, 0 Unknown, 205 Unchecked, 0.9s Time] [2022-07-23 06:09:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-23 06:09:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2022-07-23 06:09:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.7415254237288136) internal successors, (411), 354 states have internal predecessors, (411), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-07-23 06:09:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2022-07-23 06:09:22,232 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2022-07-23 06:09:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:22,232 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2022-07-23 06:09:22,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:09:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2022-07-23 06:09:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 06:09:22,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:22,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:22,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:22,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-07-23 06:09:22,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:22,648 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2022-07-23 06:09:22,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:22,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36940825] [2022-07-23 06:09:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:22,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:22,651 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) [2022-07-23 06:09:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:09:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:09:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:22,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:22,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36940825] [2022-07-23 06:09:22,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36940825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:22,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:09:22,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033373822] [2022-07-23 06:09:22,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:22,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:22,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:22,763 INFO L87 Difference]: Start difference. First operand 384 states and 460 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:22,821 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2022-07-23 06:09:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:09:22,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-23 06:09:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:22,823 INFO L225 Difference]: With dead ends: 397 [2022-07-23 06:09:22,823 INFO L226 Difference]: Without dead ends: 397 [2022-07-23 06:09:22,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:22,824 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 252 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:22,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1222 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:09:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-23 06:09:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-07-23 06:09:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.7467811158798283) internal successors, (407), 351 states have internal predecessors, (407), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-07-23 06:09:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2022-07-23 06:09:22,832 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2022-07-23 06:09:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:22,833 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2022-07-23 06:09:22,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2022-07-23 06:09:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:09:22,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:22,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:22,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-23 06:09:23,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:23,044 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-07-23 06:09:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666363395] [2022-07-23 06:09:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:23,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:23,046 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) [2022-07-23 06:09:23,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:09:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:09:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:23,152 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 15 treesize of output 7 [2022-07-23 06:09:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:09:23,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:23,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666363395] [2022-07-23 06:09:23,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666363395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:23,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:23,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:09:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037957087] [2022-07-23 06:09:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:23,169 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:23,846 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2022-07-23 06:09:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:09:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-23 06:09:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:23,849 INFO L225 Difference]: With dead ends: 422 [2022-07-23 06:09:23,849 INFO L226 Difference]: Without dead ends: 422 [2022-07-23 06:09:23,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:09:23,850 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:23,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1033 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 06:09:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-07-23 06:09:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2022-07-23 06:09:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.742489270386266) internal successors, (406), 351 states have internal predecessors, (406), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-07-23 06:09:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2022-07-23 06:09:23,859 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2022-07-23 06:09:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:23,859 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2022-07-23 06:09:23,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2022-07-23 06:09:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:09:23,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:23,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:23,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:24,070 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-07-23 06:09:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:24,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175919842] [2022-07-23 06:09:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:24,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:24,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:24,073 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) [2022-07-23 06:09:24,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:09:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:09:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:24,325 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 15 treesize of output 7 [2022-07-23 06:09:24,331 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 15 treesize of output 7 [2022-07-23 06:09:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:09:24,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:24,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175919842] [2022-07-23 06:09:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175919842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:24,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:09:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649131541] [2022-07-23 06:09:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:24,359 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:25,221 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2022-07-23 06:09:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:09:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-23 06:09:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:25,223 INFO L225 Difference]: With dead ends: 403 [2022-07-23 06:09:25,223 INFO L226 Difference]: Without dead ends: 403 [2022-07-23 06:09:25,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:09:25,224 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 39 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:25,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1084 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:09:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-07-23 06:09:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2022-07-23 06:09:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.738197424892704) internal successors, (405), 351 states have internal predecessors, (405), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-07-23 06:09:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2022-07-23 06:09:25,231 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2022-07-23 06:09:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:25,231 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2022-07-23 06:09:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2022-07-23 06:09:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:09:25,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:25,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:25,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-23 06:09:25,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:25,444 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-07-23 06:09:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363313983] [2022-07-23 06:09:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:25,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:25,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:25,446 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) [2022-07-23 06:09:25,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:09:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:09:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:09:25,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:09:25,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363313983] [2022-07-23 06:09:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363313983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:09:25,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:25,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:09:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860639705] [2022-07-23 06:09:25,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:25,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:25,562 INFO L87 Difference]: Start difference. First operand 381 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:09:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:25,602 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2022-07-23 06:09:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:09:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-23 06:09:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:25,604 INFO L225 Difference]: With dead ends: 380 [2022-07-23 06:09:25,604 INFO L226 Difference]: Without dead ends: 380 [2022-07-23 06:09:25,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:25,605 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 248 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:25,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1055 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:09:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-07-23 06:09:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-07-23 06:09:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 233 states have (on average 1.7339055793991416) internal successors, (404), 350 states have internal predecessors, (404), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2022-07-23 06:09:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-07-23 06:09:25,619 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2022-07-23 06:09:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:25,620 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-07-23 06:09:25,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:09:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-07-23 06:09:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:09:25,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:25,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:25,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:25,832 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-07-23 06:09:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275363982] [2022-07-23 06:09:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:25,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:25,834 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) [2022-07-23 06:09:25,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 06:09:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:09:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:09:25,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:25,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:25,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275363982] [2022-07-23 06:09:25,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275363982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:25,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:25,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:09:25,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213069084] [2022-07-23 06:09:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:25,956 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:09:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:26,005 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2022-07-23 06:09:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:09:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-07-23 06:09:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:26,007 INFO L225 Difference]: With dead ends: 415 [2022-07-23 06:09:26,008 INFO L226 Difference]: Without dead ends: 415 [2022-07-23 06:09:26,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:26,008 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1438 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:09:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-23 06:09:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2022-07-23 06:09:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 226 states have (on average 1.7345132743362832) internal successors, (392), 343 states have internal predecessors, (392), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-23 06:09:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2022-07-23 06:09:26,016 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2022-07-23 06:09:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:26,016 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2022-07-23 06:09:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:09:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2022-07-23 06:09:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:09:26,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:26,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:26,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-23 06:09:26,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:26,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-07-23 06:09:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:26,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026416417] [2022-07-23 06:09:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:26,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:26,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:26,229 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) [2022-07-23 06:09:26,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:09:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:09:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:26,312 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 [2022-07-23 06:09:26,377 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:09:26,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:09:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:26,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:26,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026416417] [2022-07-23 06:09:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026416417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:09:26,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:26,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-23 06:09:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606424882] [2022-07-23 06:09:26,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:09:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:09:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:09:26,516 INFO L87 Difference]: Start difference. First operand 371 states and 435 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:09:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:27,870 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2022-07-23 06:09:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:09:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-23 06:09:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:27,872 INFO L225 Difference]: With dead ends: 515 [2022-07-23 06:09:27,872 INFO L226 Difference]: Without dead ends: 515 [2022-07-23 06:09:27,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:09:27,873 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:27,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1304 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 223 Unchecked, 1.3s Time] [2022-07-23 06:09:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-23 06:09:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2022-07-23 06:09:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 229 states have (on average 1.724890829694323) internal successors, (395), 345 states have internal predecessors, (395), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-23 06:09:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2022-07-23 06:09:27,881 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2022-07-23 06:09:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:27,881 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2022-07-23 06:09:27,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:09:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2022-07-23 06:09:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:09:27,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:27,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:27,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:28,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:28,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-07-23 06:09:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:28,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797616867] [2022-07-23 06:09:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:28,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:28,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:28,093 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) [2022-07-23 06:09:28,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:09:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:09:28,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:28,208 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 [2022-07-23 06:09:32,365 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:09:32,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:09:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:09:32,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:32,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797616867] [2022-07-23 06:09:32,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797616867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:32,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777927232] [2022-07-23 06:09:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:32,589 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:09:32,590 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:09:32,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-23 06:09:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:09:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:32,734 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 [2022-07-23 06:09:32,740 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 [2022-07-23 06:09:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:09:34,948 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 [2022-07-23 06:09:34,957 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:09:34,958 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 [2022-07-23 06:09:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:09:34,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:37,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777927232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:37,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:37,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-23 06:09:37,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829995210] [2022-07-23 06:09:37,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:37,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:09:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:09:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=226, Unknown=3, NotChecked=0, Total=272 [2022-07-23 06:09:37,214 INFO L87 Difference]: Start difference. First operand 373 states and 438 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:09:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:44,222 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2022-07-23 06:09:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:09:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-07-23 06:09:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:44,225 INFO L225 Difference]: With dead ends: 645 [2022-07-23 06:09:44,225 INFO L226 Difference]: Without dead ends: 645 [2022-07-23 06:09:44,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=56, Invalid=281, Unknown=5, NotChecked=0, Total=342 [2022-07-23 06:09:44,225 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 507 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:44,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2273 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1698 Invalid, 0 Unknown, 549 Unchecked, 2.9s Time] [2022-07-23 06:09:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-23 06:09:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2022-07-23 06:09:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 229 states have (on average 1.720524017467249) internal successors, (394), 344 states have internal predecessors, (394), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-23 06:09:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2022-07-23 06:09:44,231 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2022-07-23 06:09:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:44,232 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2022-07-23 06:09:44,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:09:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2022-07-23 06:09:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:09:44,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:44,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:44,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:44,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-07-23 06:09:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:44,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-07-23 06:09:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343626912] [2022-07-23 06:09:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:44,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:44,645 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) [2022-07-23 06:09:44,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:09:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:09:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:09:44,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:09:45,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343626912] [2022-07-23 06:09:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343626912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:09:45,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:09:45,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481068856] [2022-07-23 06:09:45,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:45,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:09:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:09:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:09:45,052 INFO L87 Difference]: Start difference. First operand 372 states and 437 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:09:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:45,235 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2022-07-23 06:09:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:09:45,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-07-23 06:09:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:45,238 INFO L225 Difference]: With dead ends: 606 [2022-07-23 06:09:45,238 INFO L226 Difference]: Without dead ends: 606 [2022-07-23 06:09:45,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:09:45,239 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 324 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:45,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 2300 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2022-07-23 06:09:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-07-23 06:09:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2022-07-23 06:09:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 316 states have (on average 1.7563291139240507) internal successors, (555), 431 states have internal predecessors, (555), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2022-07-23 06:09:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2022-07-23 06:09:45,248 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2022-07-23 06:09:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:45,248 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2022-07-23 06:09:45,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:09:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2022-07-23 06:09:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:09:45,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:45,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:45,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-23 06:09:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:45,458 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-07-23 06:09:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513630485] [2022-07-23 06:09:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:45,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:45,461 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) [2022-07-23 06:09:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:09:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:09:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:45,772 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 15 treesize of output 7 [2022-07-23 06:09:45,780 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 15 treesize of output 7 [2022-07-23 06:09:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:09:45,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:09:45,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:45,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513630485] [2022-07-23 06:09:45,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513630485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:09:45,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:09:45,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:09:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372914898] [2022-07-23 06:09:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:09:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:09:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:09:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:09:45,859 INFO L87 Difference]: Start difference. First operand 473 states and 623 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:46,439 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2022-07-23 06:09:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:09:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-23 06:09:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:46,443 INFO L225 Difference]: With dead ends: 455 [2022-07-23 06:09:46,443 INFO L226 Difference]: Without dead ends: 455 [2022-07-23 06:09:46,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:09:46,444 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 12 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:46,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1249 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:09:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-23 06:09:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2022-07-23 06:09:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 296 states have (on average 1.739864864864865) internal successors, (515), 411 states have internal predecessors, (515), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2022-07-23 06:09:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2022-07-23 06:09:46,455 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2022-07-23 06:09:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:46,456 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2022-07-23 06:09:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:09:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2022-07-23 06:09:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:09:46,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:46,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:46,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:46,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:46,666 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-07-23 06:09:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:46,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260867904] [2022-07-23 06:09:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:46,669 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) [2022-07-23 06:09:46,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 06:09:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:09:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:51,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:51,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260867904] [2022-07-23 06:09:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260867904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:51,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822034185] [2022-07-23 06:09:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:09:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:09:51,148 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:09:51,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-23 06:09:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:09:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:51,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822034185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:09:55,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-23 06:09:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292060690] [2022-07-23 06:09:55,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:09:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:09:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-23 06:09:55,590 INFO L87 Difference]: Start difference. First operand 451 states and 581 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:09:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:09:56,350 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-07-23 06:09:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:09:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-07-23 06:09:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:09:56,353 INFO L225 Difference]: With dead ends: 454 [2022-07-23 06:09:56,353 INFO L226 Difference]: Without dead ends: 438 [2022-07-23 06:09:56,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-23 06:09:56,353 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 60 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:09:56,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1944 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 637 Unchecked, 0.7s Time] [2022-07-23 06:09:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-07-23 06:09:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-07-23 06:09:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 284 states have (on average 1.767605633802817) internal successors, (502), 399 states have internal predecessors, (502), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:09:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2022-07-23 06:09:56,362 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2022-07-23 06:09:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:09:56,363 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2022-07-23 06:09:56,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:09:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2022-07-23 06:09:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:09:56,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:09:56,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:09:56,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-23 06:09:56,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-23 06:09:56,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:09:56,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:09:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:09:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-07-23 06:09:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:09:56,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495701867] [2022-07-23 06:09:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:09:56,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:09:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:09:56,769 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) [2022-07-23 06:09:56,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:09:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:09:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:09:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:09:56,849 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 [2022-07-23 06:09:56,923 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:09:56,923 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 [2022-07-23 06:09:57,013 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 13 treesize of output 15 [2022-07-23 06:09:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:57,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:09:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:09:57,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:09:57,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495701867] [2022-07-23 06:09:57,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495701867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:09:57,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:09:57,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-07-23 06:09:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013022939] [2022-07-23 06:09:57,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:09:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:09:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:09:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:09:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:09:57,273 INFO L87 Difference]: Start difference. First operand 438 states and 567 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:10:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:00,730 INFO L93 Difference]: Finished difference Result 736 states and 847 transitions. [2022-07-23 06:10:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:10:00,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-07-23 06:10:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:00,732 INFO L225 Difference]: With dead ends: 736 [2022-07-23 06:10:00,732 INFO L226 Difference]: Without dead ends: 736 [2022-07-23 06:10:00,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:10:00,733 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 466 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:00,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2948 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2060 Invalid, 0 Unknown, 483 Unchecked, 3.4s Time] [2022-07-23 06:10:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-07-23 06:10:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 444. [2022-07-23 06:10:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 290 states have (on average 1.7517241379310344) internal successors, (508), 404 states have internal predecessors, (508), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:10:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 573 transitions. [2022-07-23 06:10:00,744 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 573 transitions. Word has length 30 [2022-07-23 06:10:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:00,744 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 573 transitions. [2022-07-23 06:10:00,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:10:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 573 transitions. [2022-07-23 06:10:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:00,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:00,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:00,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:00,955 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-07-23 06:10:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951693955] [2022-07-23 06:10:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:00,957 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) [2022-07-23 06:10:00,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 06:10:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:10:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:01,111 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:01,112 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 [2022-07-23 06:10:01,204 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:01,204 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 19 treesize of output 26 [2022-07-23 06:10:01,345 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 14 treesize of output 16 [2022-07-23 06:10:01,386 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 14 treesize of output 16 [2022-07-23 06:10:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:01,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:01,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951693955] [2022-07-23 06:10:01,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951693955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579336435] [2022-07-23 06:10:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:01,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:01,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:10:01,512 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:10:01,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-23 06:10:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:10:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:01,702 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 9 treesize of output 3 [2022-07-23 06:10:01,765 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:01,766 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 [2022-07-23 06:10:01,881 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:01,881 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 19 treesize of output 26 [2022-07-23 06:10:02,093 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 14 treesize of output 16 [2022-07-23 06:10:02,253 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-07-23 06:10:02,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2022-07-23 06:10:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579336435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:02,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:02,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2022-07-23 06:10:02,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957839778] [2022-07-23 06:10:02,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:02,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:10:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:10:02,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:10:02,501 INFO L87 Difference]: Start difference. First operand 444 states and 573 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:05,454 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-07-23 06:10:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:10:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2022-07-23 06:10:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:05,457 INFO L225 Difference]: With dead ends: 454 [2022-07-23 06:10:05,457 INFO L226 Difference]: Without dead ends: 454 [2022-07-23 06:10:05,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2022-07-23 06:10:05,458 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 14 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:05,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1885 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 780 Invalid, 0 Unknown, 299 Unchecked, 0.9s Time] [2022-07-23 06:10:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-23 06:10:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-07-23 06:10:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7324414715719063) internal successors, (518), 414 states have internal predecessors, (518), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:10:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 583 transitions. [2022-07-23 06:10:05,468 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 583 transitions. Word has length 32 [2022-07-23 06:10:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:05,469 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 583 transitions. [2022-07-23 06:10:05,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:10:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 583 transitions. [2022-07-23 06:10:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:05,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:05,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:05,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:05,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-07-23 06:10:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:05,879 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2022-07-23 06:10:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355073336] [2022-07-23 06:10:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:05,881 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) [2022-07-23 06:10:05,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 06:10:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:10:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:08,093 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 [2022-07-23 06:10:18,273 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:18,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:10:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:10:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:18,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355073336] [2022-07-23 06:10:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355073336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88895149] [2022-07-23 06:10:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:10:18,894 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:10:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-23 06:10:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:10:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:19,041 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 9 treesize of output 3 [2022-07-23 06:10:19,119 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:19,120 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 [2022-07-23 06:10:19,127 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 [2022-07-23 06:10:19,237 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:19,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:10:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:10:19,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:19,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [88895149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:19,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:19,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2022-07-23 06:10:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933885380] [2022-07-23 06:10:19,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:19,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:10:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:10:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=6, NotChecked=0, Total=210 [2022-07-23 06:10:19,884 INFO L87 Difference]: Start difference. First operand 454 states and 583 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:10:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:28,709 INFO L93 Difference]: Finished difference Result 454 states and 582 transitions. [2022-07-23 06:10:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:10:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-07-23 06:10:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:28,711 INFO L225 Difference]: With dead ends: 454 [2022-07-23 06:10:28,711 INFO L226 Difference]: Without dead ends: 454 [2022-07-23 06:10:28,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=123, Invalid=373, Unknown=10, NotChecked=0, Total=506 [2022-07-23 06:10:28,712 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 14 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:28,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1536 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 557 Unchecked, 0.6s Time] [2022-07-23 06:10:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-23 06:10:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-07-23 06:10:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 414 states have internal predecessors, (517), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:10:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 582 transitions. [2022-07-23 06:10:28,720 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 582 transitions. Word has length 32 [2022-07-23 06:10:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:28,720 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 582 transitions. [2022-07-23 06:10:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:10:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 582 transitions. [2022-07-23 06:10:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:10:28,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:28,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:28,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:28,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-23 06:10:29,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:29,128 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2022-07-23 06:10:29,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:29,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901379532] [2022-07-23 06:10:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:29,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:29,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:29,129 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:29,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 06:10:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:29,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:29,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:29,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901379532] [2022-07-23 06:10:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901379532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:29,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:29,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:10:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684339880] [2022-07-23 06:10:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:29,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:29,229 INFO L87 Difference]: Start difference. First operand 454 states and 582 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:10:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:29,286 INFO L93 Difference]: Finished difference Result 479 states and 608 transitions. [2022-07-23 06:10:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-07-23 06:10:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:29,289 INFO L225 Difference]: With dead ends: 479 [2022-07-23 06:10:29,289 INFO L226 Difference]: Without dead ends: 479 [2022-07-23 06:10:29,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:29,290 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 245 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:29,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1232 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:10:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-23 06:10:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 448. [2022-07-23 06:10:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.7406143344709897) internal successors, (510), 408 states have internal predecessors, (510), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:10:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 575 transitions. [2022-07-23 06:10:29,299 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 575 transitions. Word has length 32 [2022-07-23 06:10:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:29,299 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 575 transitions. [2022-07-23 06:10:29,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:10:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 575 transitions. [2022-07-23 06:10:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:10:29,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:29,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:29,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:29,509 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-07-23 06:10:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:29,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247972733] [2022-07-23 06:10:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:29,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:29,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:29,512 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:29,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 06:10:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:29,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:29,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:29,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247972733] [2022-07-23 06:10:29,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247972733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:10:29,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:29,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:10:29,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404908024] [2022-07-23 06:10:29,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:29,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:29,689 INFO L87 Difference]: Start difference. First operand 448 states and 575 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:10:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:29,734 INFO L93 Difference]: Finished difference Result 447 states and 574 transitions. [2022-07-23 06:10:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-07-23 06:10:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:29,736 INFO L225 Difference]: With dead ends: 447 [2022-07-23 06:10:29,736 INFO L226 Difference]: Without dead ends: 447 [2022-07-23 06:10:29,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:29,737 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:29,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1053 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:10:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-23 06:10:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2022-07-23 06:10:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 293 states have (on average 1.7372013651877134) internal successors, (509), 407 states have internal predecessors, (509), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-23 06:10:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 574 transitions. [2022-07-23 06:10:29,745 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 574 transitions. Word has length 33 [2022-07-23 06:10:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:29,746 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 574 transitions. [2022-07-23 06:10:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:10:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 574 transitions. [2022-07-23 06:10:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:10:29,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:29,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:29,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-23 06:10:29,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:29,951 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263217, now seen corresponding path program 1 times [2022-07-23 06:10:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:29,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985787147] [2022-07-23 06:10:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:29,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:29,954 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:29,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-23 06:10:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:30,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:30,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985787147] [2022-07-23 06:10:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985787147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:30,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:30,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:10:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870777745] [2022-07-23 06:10:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:30,073 INFO L87 Difference]: Start difference. First operand 447 states and 574 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:10:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:30,115 INFO L93 Difference]: Finished difference Result 407 states and 451 transitions. [2022-07-23 06:10:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-07-23 06:10:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:30,118 INFO L225 Difference]: With dead ends: 407 [2022-07-23 06:10:30,118 INFO L226 Difference]: Without dead ends: 407 [2022-07-23 06:10:30,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:30,119 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 49 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:30,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1438 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:10:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-23 06:10:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 358. [2022-07-23 06:10:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 215 states have (on average 1.6744186046511629) internal successors, (360), 329 states have internal predecessors, (360), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-23 06:10:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-07-23 06:10:30,129 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 33 [2022-07-23 06:10:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:30,129 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-07-23 06:10:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:10:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-07-23 06:10:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:10:30,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:30,130 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:30,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:30,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:30,340 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2022-07-23 06:10:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:30,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824360563] [2022-07-23 06:10:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:30,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:30,342 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:30,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 06:10:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:10:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:30,497 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:30,498 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 [2022-07-23 06:10:32,547 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:10:32,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:10:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:10:32,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:34,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824360563] [2022-07-23 06:10:34,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824360563] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:34,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:10:34,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-23 06:10:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230564805] [2022-07-23 06:10:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:10:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:10:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2022-07-23 06:10:34,801 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:10:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:35,101 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2022-07-23 06:10:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:10:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-07-23 06:10:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:35,103 INFO L225 Difference]: With dead ends: 362 [2022-07-23 06:10:35,103 INFO L226 Difference]: Without dead ends: 362 [2022-07-23 06:10:35,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2022-07-23 06:10:35,104 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:35,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-07-23 06:10:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-23 06:10:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-07-23 06:10:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 215 states have (on average 1.669767441860465) internal successors, (359), 328 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-23 06:10:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 399 transitions. [2022-07-23 06:10:35,110 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 399 transitions. Word has length 33 [2022-07-23 06:10:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:35,111 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 399 transitions. [2022-07-23 06:10:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:10:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 399 transitions. [2022-07-23 06:10:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:10:35,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:35,112 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:35,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-07-23 06:10:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,323 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-07-23 06:10:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:35,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377591263] [2022-07-23 06:10:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:35,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:35,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:35,325 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:35,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-23 06:10:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 06:10:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:35,449 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 [2022-07-23 06:10:35,457 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 [2022-07-23 06:10:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:35,568 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 [2022-07-23 06:10:35,576 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:35,576 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 [2022-07-23 06:10:35,697 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:35,698 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 [2022-07-23 06:10:35,703 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 [2022-07-23 06:10:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:37,784 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 [2022-07-23 06:10:37,793 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:37,793 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 [2022-07-23 06:10:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:37,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:41,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377591263] [2022-07-23 06:10:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377591263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433881242] [2022-07-23 06:10:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:10:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:10:41,076 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:10:41,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-23 06:10:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 06:10:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:41,253 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 [2022-07-23 06:10:41,259 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 [2022-07-23 06:10:41,356 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:41,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:10:41,369 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:41,369 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 [2022-07-23 06:10:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:41,474 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 [2022-07-23 06:10:41,494 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:10:41,494 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 [2022-07-23 06:10:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:10:43,573 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 [2022-07-23 06:10:43,587 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:43,587 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 [2022-07-23 06:10:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:10:43,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:43,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433881242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:43,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:43,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2022-07-23 06:10:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275947650] [2022-07-23 06:10:43,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:10:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:10:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:10:43,786 INFO L87 Difference]: Start difference. First operand 357 states and 399 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:10:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:46,520 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2022-07-23 06:10:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-07-23 06:10:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:46,523 INFO L225 Difference]: With dead ends: 610 [2022-07-23 06:10:46,523 INFO L226 Difference]: Without dead ends: 610 [2022-07-23 06:10:46,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:10:46,524 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:46,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1737 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1652 Invalid, 0 Unknown, 266 Unchecked, 2.6s Time] [2022-07-23 06:10:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-23 06:10:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2022-07-23 06:10:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 215 states have (on average 1.6604651162790698) internal successors, (357), 327 states have internal predecessors, (357), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-23 06:10:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2022-07-23 06:10:46,530 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2022-07-23 06:10:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:46,531 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2022-07-23 06:10:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:10:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2022-07-23 06:10:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 06:10:46,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:46,532 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:46,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:46,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-23 06:10:46,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-07-23 06:10:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634456712] [2022-07-23 06:10:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:46,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:46,976 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:46,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-23 06:10:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:47,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:47,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634456712] [2022-07-23 06:10:47,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634456712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:10:47,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:47,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:10:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990329563] [2022-07-23 06:10:47,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:10:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:10:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:47,396 INFO L87 Difference]: Start difference. First operand 356 states and 397 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:10:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:47,640 INFO L93 Difference]: Finished difference Result 560 states and 625 transitions. [2022-07-23 06:10:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2022-07-23 06:10:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:47,642 INFO L225 Difference]: With dead ends: 560 [2022-07-23 06:10:47,642 INFO L226 Difference]: Without dead ends: 560 [2022-07-23 06:10:47,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:47,643 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 294 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:47,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2166 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-07-23 06:10:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-23 06:10:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 439. [2022-07-23 06:10:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 288 states have (on average 1.7083333333333333) internal successors, (492), 399 states have internal predecessors, (492), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 549 transitions. [2022-07-23 06:10:47,651 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 549 transitions. Word has length 34 [2022-07-23 06:10:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:47,651 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 549 transitions. [2022-07-23 06:10:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:10:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 549 transitions. [2022-07-23 06:10:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 06:10:47,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:47,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:47,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:47,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:47,863 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-07-23 06:10:47,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:47,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520060012] [2022-07-23 06:10:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:47,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:47,866 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-23 06:10:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:10:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:48,124 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:48,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:10:48,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:10:48,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:10:48,298 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 15 treesize of output 7 [2022-07-23 06:10:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:10:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:48,417 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 06:10:48,417 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 28 treesize of output 27 [2022-07-23 06:10:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:48,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:48,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520060012] [2022-07-23 06:10:48,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520060012] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:48,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:10:48,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-07-23 06:10:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353894614] [2022-07-23 06:10:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:10:48,612 INFO L87 Difference]: Start difference. First operand 439 states and 549 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:49,890 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-07-23 06:10:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-07-23 06:10:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:49,893 INFO L225 Difference]: With dead ends: 479 [2022-07-23 06:10:49,893 INFO L226 Difference]: Without dead ends: 479 [2022-07-23 06:10:49,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:10:49,894 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:49,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1718 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 06:10:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-23 06:10:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-07-23 06:10:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.706896551724138) internal successors, (495), 401 states have internal predecessors, (495), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 552 transitions. [2022-07-23 06:10:49,902 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 552 transitions. Word has length 34 [2022-07-23 06:10:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:49,902 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 552 transitions. [2022-07-23 06:10:49,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 552 transitions. [2022-07-23 06:10:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 06:10:49,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:49,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:49,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:50,112 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-07-23 06:10:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:50,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473288576] [2022-07-23 06:10:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:50,114 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:50,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-23 06:10:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:10:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:50,417 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:50,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:10:50,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:10:50,441 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:50,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:10:50,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:10:50,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:10:50,703 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:50,703 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 38 treesize of output 36 [2022-07-23 06:10:50,708 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 47 treesize of output 39 [2022-07-23 06:10:50,711 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 42 treesize of output 34 [2022-07-23 06:10:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:10:50,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:50,844 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:10:50,844 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 38 treesize of output 42 [2022-07-23 06:10:50,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-23 06:10:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:51,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:51,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473288576] [2022-07-23 06:10:51,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473288576] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:51,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:10:51,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-07-23 06:10:51,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122893170] [2022-07-23 06:10:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:51,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:10:51,647 INFO L87 Difference]: Start difference. First operand 441 states and 552 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:54,148 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-07-23 06:10:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-07-23 06:10:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:54,150 INFO L225 Difference]: With dead ends: 479 [2022-07-23 06:10:54,150 INFO L226 Difference]: Without dead ends: 479 [2022-07-23 06:10:54,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:10:54,151 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 117 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:54,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1499 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-23 06:10:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-23 06:10:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-07-23 06:10:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 290 states have (on average 1.703448275862069) internal successors, (494), 401 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 551 transitions. [2022-07-23 06:10:54,160 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 551 transitions. Word has length 34 [2022-07-23 06:10:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:54,160 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 551 transitions. [2022-07-23 06:10:54,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 551 transitions. [2022-07-23 06:10:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:10:54,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:54,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:54,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:54,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:54,370 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-07-23 06:10:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318712831] [2022-07-23 06:10:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:54,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:54,372 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-23 06:10:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:54,473 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 [2022-07-23 06:10:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:54,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:10:54,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:54,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318712831] [2022-07-23 06:10:54,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318712831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:10:54,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:54,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-23 06:10:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850438580] [2022-07-23 06:10:54,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:10:54,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:10:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:54,587 INFO L87 Difference]: Start difference. First operand 441 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:10:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:55,042 INFO L93 Difference]: Finished difference Result 446 states and 557 transitions. [2022-07-23 06:10:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:10:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-07-23 06:10:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:55,045 INFO L225 Difference]: With dead ends: 446 [2022-07-23 06:10:55,045 INFO L226 Difference]: Without dead ends: 446 [2022-07-23 06:10:55,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:10:55,045 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:55,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1159 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2022-07-23 06:10:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-23 06:10:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-07-23 06:10:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6962457337883958) internal successors, (497), 404 states have internal predecessors, (497), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 554 transitions. [2022-07-23 06:10:55,057 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 554 transitions. Word has length 35 [2022-07-23 06:10:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:55,058 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 554 transitions. [2022-07-23 06:10:55,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:10:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 554 transitions. [2022-07-23 06:10:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 06:10:55,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:55,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:55,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-23 06:10:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:55,268 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2022-07-23 06:10:55,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185233523] [2022-07-23 06:10:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:55,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:55,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:55,270 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:55,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-23 06:10:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:55,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:55,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185233523] [2022-07-23 06:10:55,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185233523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:55,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:55,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:10:55,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557393995] [2022-07-23 06:10:55,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:55,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:10:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:10:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:55,387 INFO L87 Difference]: Start difference. First operand 444 states and 554 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:10:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:55,446 INFO L93 Difference]: Finished difference Result 488 states and 600 transitions. [2022-07-23 06:10:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-23 06:10:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:55,448 INFO L225 Difference]: With dead ends: 488 [2022-07-23 06:10:55,448 INFO L226 Difference]: Without dead ends: 488 [2022-07-23 06:10:55,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:10:55,449 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 238 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:55,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1261 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:10:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-07-23 06:10:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 442. [2022-07-23 06:10:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 291 states have (on average 1.697594501718213) internal successors, (494), 402 states have internal predecessors, (494), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 551 transitions. [2022-07-23 06:10:55,455 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 551 transitions. Word has length 35 [2022-07-23 06:10:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:55,455 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 551 transitions. [2022-07-23 06:10:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:10:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 551 transitions. [2022-07-23 06:10:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:10:55,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:55,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:55,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:55,666 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2022-07-23 06:10:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:55,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207554931] [2022-07-23 06:10:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:55,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:55,668 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:55,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-23 06:10:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:10:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:56,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:10:56,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207554931] [2022-07-23 06:10:56,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207554931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:10:56,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:10:56,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:10:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272741421] [2022-07-23 06:10:56,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:10:56,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:10:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:10:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:56,255 INFO L87 Difference]: Start difference. First operand 442 states and 551 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:10:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:56,415 INFO L93 Difference]: Finished difference Result 564 states and 629 transitions. [2022-07-23 06:10:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:10:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2022-07-23 06:10:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:56,417 INFO L225 Difference]: With dead ends: 564 [2022-07-23 06:10:56,418 INFO L226 Difference]: Without dead ends: 564 [2022-07-23 06:10:56,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:10:56,418 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 305 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:56,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2039 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-07-23 06:10:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-23 06:10:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 444. [2022-07-23 06:10:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6928327645051195) internal successors, (496), 404 states have internal predecessors, (496), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2022-07-23 06:10:56,425 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2022-07-23 06:10:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:56,425 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2022-07-23 06:10:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:10:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2022-07-23 06:10:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:10:56,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:56,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:56,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-07-23 06:10:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:56,636 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-07-23 06:10:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:56,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967186983] [2022-07-23 06:10:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:56,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:56,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:56,640 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:56,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-23 06:10:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:56,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:10:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:56,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:10:56,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:56,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967186983] [2022-07-23 06:10:56,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967186983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:10:56,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:10:56,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:10:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731877598] [2022-07-23 06:10:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:56,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:10:56,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:10:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:10:56,754 INFO L87 Difference]: Start difference. First operand 444 states and 553 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:10:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:57,070 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2022-07-23 06:10:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:10:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-23 06:10:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:57,073 INFO L225 Difference]: With dead ends: 462 [2022-07-23 06:10:57,073 INFO L226 Difference]: Without dead ends: 462 [2022-07-23 06:10:57,073 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 [2022-07-23 06:10:57,073 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:57,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:10:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-23 06:10:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2022-07-23 06:10:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 405 states have internal predecessors, (499), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2022-07-23 06:10:57,079 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2022-07-23 06:10:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:57,079 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2022-07-23 06:10:57,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:10:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2022-07-23 06:10:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:10:57,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:57,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:57,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:57,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:57,283 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-07-23 06:10:57,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:57,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833241568] [2022-07-23 06:10:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:57,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:57,285 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-23 06:10:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 06:10:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:57,606 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:57,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:10:57,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:10:57,633 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:10:57,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:10:57,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:10:57,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:10:57,916 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 40 treesize of output 32 [2022-07-23 06:10:57,920 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 39 treesize of output 31 [2022-07-23 06:10:57,928 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:57,929 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 39 treesize of output 37 [2022-07-23 06:10:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:10:58,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:58,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-23 06:10:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:10:58,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:10:58,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833241568] [2022-07-23 06:10:58,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833241568] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:10:58,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:10:58,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-07-23 06:10:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102706631] [2022-07-23 06:10:58,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:10:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:10:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:10:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:10:58,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:10:58,320 INFO L87 Difference]: Start difference. First operand 445 states and 556 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:10:59,372 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2022-07-23 06:10:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:10:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-23 06:10:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:10:59,374 INFO L225 Difference]: With dead ends: 451 [2022-07-23 06:10:59,374 INFO L226 Difference]: Without dead ends: 451 [2022-07-23 06:10:59,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:10:59,375 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 30 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:10:59,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1939 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 06:10:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-23 06:10:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2022-07-23 06:10:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 297 states have (on average 1.6868686868686869) internal successors, (501), 407 states have internal predecessors, (501), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:10:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2022-07-23 06:10:59,381 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2022-07-23 06:10:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:10:59,381 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2022-07-23 06:10:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:10:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2022-07-23 06:10:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-23 06:10:59,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:10:59,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:10:59,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-23 06:10:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:10:59,592 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:10:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:10:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-07-23 06:10:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:10:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777817297] [2022-07-23 06:10:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:10:59,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:10:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:10:59,594 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:10:59,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-07-23 06:10:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:10:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:10:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:10:59,708 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 [2022-07-23 06:10:59,758 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:10:59,758 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 [2022-07-23 06:10:59,825 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 [2022-07-23 06:10:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:10:59,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:10:59,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-07-23 06:11:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:11:00,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777817297] [2022-07-23 06:11:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777817297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:00,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:00,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-07-23 06:11:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756137521] [2022-07-23 06:11:00,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:00,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:11:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:11:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:11:00,016 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:01,426 INFO L93 Difference]: Finished difference Result 454 states and 565 transitions. [2022-07-23 06:11:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:11:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-07-23 06:11:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:01,428 INFO L225 Difference]: With dead ends: 454 [2022-07-23 06:11:01,428 INFO L226 Difference]: Without dead ends: 454 [2022-07-23 06:11:01,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:11:01,428 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 294 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:01,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1814 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 858 Invalid, 0 Unknown, 129 Unchecked, 1.4s Time] [2022-07-23 06:11:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-23 06:11:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 448. [2022-07-23 06:11:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 298 states have (on average 1.6845637583892616) internal successors, (502), 408 states have internal predecessors, (502), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-07-23 06:11:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2022-07-23 06:11:01,435 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2022-07-23 06:11:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:01,435 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2022-07-23 06:11:01,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-23 06:11:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2022-07-23 06:11:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 06:11:01,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:01,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:01,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:01,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:01,646 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-07-23 06:11:01,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288542597] [2022-07-23 06:11:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:01,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:01,648 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:01,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-23 06:11:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:11:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:11:08,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:08,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2022-07-23 06:11:10,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288542597] [2022-07-23 06:11:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288542597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353029833] [2022-07-23 06:11:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:10,799 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:11:10,803 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:11:10,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-07-23 06:11:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:10,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:11:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:11:22,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:24,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2022-07-23 06:11:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1353029833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:27,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:27,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-23 06:11:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882646102] [2022-07-23 06:11:27,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:11:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:11:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=804, Unknown=9, NotChecked=0, Total=930 [2022-07-23 06:11:27,265 INFO L87 Difference]: Start difference. First operand 448 states and 559 transitions. Second operand has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:11:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:29,498 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2022-07-23 06:11:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:11:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-07-23 06:11:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:29,501 INFO L225 Difference]: With dead ends: 453 [2022-07-23 06:11:29,501 INFO L226 Difference]: Without dead ends: 434 [2022-07-23 06:11:29,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=144, Invalid=1107, Unknown=9, NotChecked=0, Total=1260 [2022-07-23 06:11:29,502 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 53 mSDsluCounter, 2826 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1655 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:29,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3131 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 533 Invalid, 0 Unknown, 1655 Unchecked, 1.8s Time] [2022-07-23 06:11:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-23 06:11:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-07-23 06:11:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 283 states have (on average 1.7173144876325088) internal successors, (486), 393 states have internal predecessors, (486), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2022-07-23 06:11:29,509 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2022-07-23 06:11:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2022-07-23 06:11:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:11:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2022-07-23 06:11:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:29,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:29,510 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-23 06:11:29,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-07-23 06:11:29,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:29,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:29,921 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2022-07-23 06:11:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:29,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917365855] [2022-07-23 06:11:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:29,923 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:29,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-23 06:11:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:30,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:30,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:30,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917365855] [2022-07-23 06:11:30,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917365855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:30,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:30,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:11:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473911447] [2022-07-23 06:11:30,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:30,103 INFO L87 Difference]: Start difference. First operand 432 states and 542 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:11:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:30,159 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2022-07-23 06:11:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-07-23 06:11:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:30,162 INFO L225 Difference]: With dead ends: 431 [2022-07-23 06:11:30,162 INFO L226 Difference]: Without dead ends: 431 [2022-07-23 06:11:30,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:30,162 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:30,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1042 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-23 06:11:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-07-23 06:11:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 283 states have (on average 1.7137809187279152) internal successors, (485), 392 states have internal predecessors, (485), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2022-07-23 06:11:30,169 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2022-07-23 06:11:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2022-07-23 06:11:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:11:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2022-07-23 06:11:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:30,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:30,170 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:30,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:30,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:30,380 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2022-07-23 06:11:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:30,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210081841] [2022-07-23 06:11:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:30,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:30,382 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:30,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-23 06:11:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:30,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:11:30,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:30,555 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:11:30,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:11:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:11:30,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:30,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210081841] [2022-07-23 06:11:30,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210081841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:30,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:30,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237103072] [2022-07-23 06:11:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:30,565 INFO L87 Difference]: Start difference. First operand 431 states and 541 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:11:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:31,257 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2022-07-23 06:11:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-07-23 06:11:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:31,259 INFO L225 Difference]: With dead ends: 485 [2022-07-23 06:11:31,260 INFO L226 Difference]: Without dead ends: 485 [2022-07-23 06:11:31,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:31,260 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:31,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 867 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 353 Invalid, 0 Unknown, 201 Unchecked, 0.7s Time] [2022-07-23 06:11:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-23 06:11:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2022-07-23 06:11:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 283 states have (on average 1.7102473498233215) internal successors, (484), 391 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2022-07-23 06:11:31,266 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2022-07-23 06:11:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:31,266 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2022-07-23 06:11:31,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:11:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2022-07-23 06:11:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:31,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:31,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:31,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:31,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:31,468 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2022-07-23 06:11:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365376449] [2022-07-23 06:11:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:31,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:31,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:31,470 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:31,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-23 06:11:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:11:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:31,741 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 14 treesize of output 16 [2022-07-23 06:11:31,750 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:31,750 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 [2022-07-23 06:11:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:11:31,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:36,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365376449] [2022-07-23 06:11:36,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365376449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242265161] [2022-07-23 06:11:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:11:36,047 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:11:36,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-07-23 06:11:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-23 06:11:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:36,298 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 [2022-07-23 06:11:36,302 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 [2022-07-23 06:11:36,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:11:36,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:11:36,482 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:36,482 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 [2022-07-23 06:11:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:36,601 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 [2022-07-23 06:11:36,608 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:36,609 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 [2022-07-23 06:11:42,839 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:11:42,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:11:43,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:43,075 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-23 06:11:43,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2022-07-23 06:11:43,087 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:43,088 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 14 treesize of output 14 [2022-07-23 06:11:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:11:43,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242265161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:43,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:43,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 20 [2022-07-23 06:11:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338997977] [2022-07-23 06:11:43,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:11:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:11:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=425, Unknown=4, NotChecked=0, Total=506 [2022-07-23 06:11:43,300 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-23 06:11:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:50,021 INFO L93 Difference]: Finished difference Result 674 states and 819 transitions. [2022-07-23 06:11:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:11:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2022-07-23 06:11:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:50,024 INFO L225 Difference]: With dead ends: 674 [2022-07-23 06:11:50,024 INFO L226 Difference]: Without dead ends: 674 [2022-07-23 06:11:50,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=99, Invalid=545, Unknown=6, NotChecked=0, Total=650 [2022-07-23 06:11:50,025 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 719 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1014 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:50,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 3419 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1669 Invalid, 0 Unknown, 1014 Unchecked, 2.6s Time] [2022-07-23 06:11:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-23 06:11:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 426. [2022-07-23 06:11:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 280 states have (on average 1.7107142857142856) internal successors, (479), 388 states have internal predecessors, (479), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 535 transitions. [2022-07-23 06:11:50,044 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 535 transitions. Word has length 41 [2022-07-23 06:11:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:50,044 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 535 transitions. [2022-07-23 06:11:50,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-23 06:11:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 535 transitions. [2022-07-23 06:11:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:11:50,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:50,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:50,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:50,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-07-23 06:11:50,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:50,456 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2022-07-23 06:11:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:50,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692136346] [2022-07-23 06:11:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:50,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:50,480 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:50,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-23 06:11:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:11:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:50,599 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 [2022-07-23 06:11:50,665 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:11:50,665 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 [2022-07-23 06:11:50,745 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:11:50,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-23 06:11:50,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:11:50,900 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 15 treesize of output 17 [2022-07-23 06:11:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:11:50,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:51,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692136346] [2022-07-23 06:11:51,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692136346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1585146327] [2022-07-23 06:11:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:51,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:11:51,222 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:11:51,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-07-23 06:11:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:11:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:51,409 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 [2022-07-23 06:11:51,445 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:51,445 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 [2022-07-23 06:11:51,528 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:11:51,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2022-07-23 06:11:51,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:11:51,625 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 15 treesize of output 17 [2022-07-23 06:11:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:11:51,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1585146327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:51,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:51,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2022-07-23 06:11:51,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070691697] [2022-07-23 06:11:51,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:51,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:11:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:11:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:11:51,860 INFO L87 Difference]: Start difference. First operand 426 states and 535 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:11:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:53,813 INFO L93 Difference]: Finished difference Result 523 states and 598 transitions. [2022-07-23 06:11:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:11:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-07-23 06:11:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:53,815 INFO L225 Difference]: With dead ends: 523 [2022-07-23 06:11:53,815 INFO L226 Difference]: Without dead ends: 523 [2022-07-23 06:11:53,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:11:53,816 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 216 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:53,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 2164 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1237 Invalid, 0 Unknown, 215 Unchecked, 1.9s Time] [2022-07-23 06:11:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-23 06:11:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 429. [2022-07-23 06:11:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 283 states have (on average 1.7031802120141342) internal successors, (482), 391 states have internal predecessors, (482), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 538 transitions. [2022-07-23 06:11:53,820 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 538 transitions. Word has length 41 [2022-07-23 06:11:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:53,821 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 538 transitions. [2022-07-23 06:11:53,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:11:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 538 transitions. [2022-07-23 06:11:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:11:53,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:53,821 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-23 06:11:53,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-07-23 06:11:54,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-07-23 06:11:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:54,225 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2022-07-23 06:11:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:54,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856174329] [2022-07-23 06:11:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:54,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:54,227 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:54,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-07-23 06:11:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:54,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:54,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856174329] [2022-07-23 06:11:54,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856174329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:54,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:54,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300380353] [2022-07-23 06:11:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:54,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:54,376 INFO L87 Difference]: Start difference. First operand 429 states and 538 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:54,413 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2022-07-23 06:11:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-07-23 06:11:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:54,415 INFO L225 Difference]: With dead ends: 488 [2022-07-23 06:11:54,415 INFO L226 Difference]: Without dead ends: 488 [2022-07-23 06:11:54,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:54,415 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 53 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:54,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1420 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-07-23 06:11:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 431. [2022-07-23 06:11:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 285 states have (on average 1.6982456140350877) internal successors, (484), 392 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-23 06:11:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 540 transitions. [2022-07-23 06:11:54,422 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 540 transitions. Word has length 42 [2022-07-23 06:11:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:54,422 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 540 transitions. [2022-07-23 06:11:54,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 540 transitions. [2022-07-23 06:11:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:11:54,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:54,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-23 06:11:54,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:54,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:54,633 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2022-07-23 06:11:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445890131] [2022-07-23 06:11:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:54,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:54,635 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:54,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-07-23 06:11:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:54,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:11:55,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:55,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445890131] [2022-07-23 06:11:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445890131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:55,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:55,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:11:55,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813750734] [2022-07-23 06:11:55,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:55,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:11:55,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:11:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:11:55,145 INFO L87 Difference]: Start difference. First operand 431 states and 540 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:11:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:55,342 INFO L93 Difference]: Finished difference Result 611 states and 738 transitions. [2022-07-23 06:11:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:11:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2022-07-23 06:11:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:55,345 INFO L225 Difference]: With dead ends: 611 [2022-07-23 06:11:55,345 INFO L226 Difference]: Without dead ends: 611 [2022-07-23 06:11:55,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:11:55,346 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 214 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:55,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 3025 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-07-23 06:11:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-07-23 06:11:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 491. [2022-07-23 06:11:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 335 states have (on average 1.6865671641791045) internal successors, (565), 446 states have internal predecessors, (565), 29 states have call successors, (29), 20 states have call predecessors, (29), 26 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:11:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 636 transitions. [2022-07-23 06:11:55,354 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 636 transitions. Word has length 42 [2022-07-23 06:11:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:55,354 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 636 transitions. [2022-07-23 06:11:55,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:11:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 636 transitions. [2022-07-23 06:11:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:11:55,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:55,355 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:55,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-07-23 06:11:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:55,565 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2022-07-23 06:11:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:55,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88025455] [2022-07-23 06:11:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:55,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:55,567 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-07-23 06:11:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:11:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:55,692 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 [2022-07-23 06:11:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:55,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:55,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88025455] [2022-07-23 06:11:55,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88025455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:55,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378469632] [2022-07-23 06:11:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:55,713 INFO L87 Difference]: Start difference. First operand 491 states and 636 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:56,201 INFO L93 Difference]: Finished difference Result 496 states and 640 transitions. [2022-07-23 06:11:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-07-23 06:11:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:56,203 INFO L225 Difference]: With dead ends: 496 [2022-07-23 06:11:56,203 INFO L226 Difference]: Without dead ends: 496 [2022-07-23 06:11:56,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:56,204 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:56,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 945 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:11:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-23 06:11:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 492. [2022-07-23 06:11:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 336 states have (on average 1.681547619047619) internal successors, (565), 447 states have internal predecessors, (565), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:11:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 636 transitions. [2022-07-23 06:11:56,210 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 636 transitions. Word has length 42 [2022-07-23 06:11:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:56,210 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 636 transitions. [2022-07-23 06:11:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 636 transitions. [2022-07-23 06:11:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:11:56,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:56,211 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:56,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-07-23 06:11:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,415 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2022-07-23 06:11:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67261172] [2022-07-23 06:11:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:56,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:56,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:56,417 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:56,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-07-23 06:11:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:11:56,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:56,554 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 [2022-07-23 06:11:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 06:11:56,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:56,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67261172] [2022-07-23 06:11:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67261172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:56,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:56,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858684887] [2022-07-23 06:11:56,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:56,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:11:56,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:11:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:11:56,600 INFO L87 Difference]: Start difference. First operand 492 states and 636 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:57,466 INFO L93 Difference]: Finished difference Result 545 states and 693 transitions. [2022-07-23 06:11:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:11:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-07-23 06:11:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:57,468 INFO L225 Difference]: With dead ends: 545 [2022-07-23 06:11:57,469 INFO L226 Difference]: Without dead ends: 545 [2022-07-23 06:11:57,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:11:57,469 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 57 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:57,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1424 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:11:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-07-23 06:11:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 491. [2022-07-23 06:11:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 336 states have (on average 1.6785714285714286) internal successors, (564), 446 states have internal predecessors, (564), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:11:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 635 transitions. [2022-07-23 06:11:57,475 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 635 transitions. Word has length 42 [2022-07-23 06:11:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:57,475 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 635 transitions. [2022-07-23 06:11:57,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 635 transitions. [2022-07-23 06:11:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:11:57,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:57,476 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-23 06:11:57,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:57,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:57,676 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2022-07-23 06:11:57,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:57,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18591411] [2022-07-23 06:11:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:57,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:57,679 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-07-23 06:11:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:57,822 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 [2022-07-23 06:11:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:11:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:11:57,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18591411] [2022-07-23 06:11:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18591411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:57,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:57,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-23 06:11:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741807507] [2022-07-23 06:11:57,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:57,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:11:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:11:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:11:57,954 INFO L87 Difference]: Start difference. First operand 491 states and 635 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:11:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:58,998 INFO L93 Difference]: Finished difference Result 494 states and 638 transitions. [2022-07-23 06:11:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:11:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-07-23 06:11:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:59,001 INFO L225 Difference]: With dead ends: 494 [2022-07-23 06:11:59,001 INFO L226 Difference]: Without dead ends: 494 [2022-07-23 06:11:59,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:11:59,002 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 41 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:59,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1160 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 119 Unchecked, 1.0s Time] [2022-07-23 06:11:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-07-23 06:11:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2022-07-23 06:11:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 339 states have (on average 1.6725663716814159) internal successors, (567), 449 states have internal predecessors, (567), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:11:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 638 transitions. [2022-07-23 06:11:59,010 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 638 transitions. Word has length 43 [2022-07-23 06:11:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:59,011 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 638 transitions. [2022-07-23 06:11:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:11:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 638 transitions. [2022-07-23 06:11:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:11:59,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:59,012 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:59,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:59,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:59,223 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2022-07-23 06:11:59,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:59,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218513228] [2022-07-23 06:11:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:59,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:59,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:59,225 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:59,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-07-23 06:11:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:59,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:11:59,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:59,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218513228] [2022-07-23 06:11:59,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218513228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:59,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:59,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935195534] [2022-07-23 06:11:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:59,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:59,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:59,364 INFO L87 Difference]: Start difference. First operand 494 states and 638 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:59,420 INFO L93 Difference]: Finished difference Result 542 states and 689 transitions. [2022-07-23 06:11:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-07-23 06:11:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:59,423 INFO L225 Difference]: With dead ends: 542 [2022-07-23 06:11:59,423 INFO L226 Difference]: Without dead ends: 542 [2022-07-23 06:11:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:59,424 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 228 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:59,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1254 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-07-23 06:11:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 492. [2022-07-23 06:11:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 337 states have (on average 1.6735905044510386) internal successors, (564), 447 states have internal predecessors, (564), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:11:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 635 transitions. [2022-07-23 06:11:59,431 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 635 transitions. Word has length 43 [2022-07-23 06:11:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 635 transitions. [2022-07-23 06:11:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:11:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 635 transitions. [2022-07-23 06:11:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:11:59,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:59,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:59,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:59,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:59,643 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:11:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2022-07-23 06:11:59,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:59,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439151573] [2022-07-23 06:11:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:59,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:59,647 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:59,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-07-23 06:11:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:11:59,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:59,908 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:11:59,908 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 [2022-07-23 06:12:00,000 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:00,001 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 19 treesize of output 26 [2022-07-23 06:12:00,111 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:00,112 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 19 treesize of output 26 [2022-07-23 06:12:00,277 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 14 treesize of output 16 [2022-07-23 06:12:00,313 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 14 treesize of output 16 [2022-07-23 06:12:00,334 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 14 treesize of output 16 [2022-07-23 06:12:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:12:00,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:00,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439151573] [2022-07-23 06:12:00,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439151573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [236330290] [2022-07-23 06:12:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:00,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:00,490 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:00,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-07-23 06:12:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 06:12:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:00,738 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 9 treesize of output 3 [2022-07-23 06:12:00,791 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:00,791 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 [2022-07-23 06:12:00,904 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:00,905 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 19 treesize of output 26 [2022-07-23 06:12:01,211 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:12:01,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2022-07-23 06:12:01,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 25 [2022-07-23 06:12:01,930 INFO L356 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2022-07-23 06:12:01,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 50 [2022-07-23 06:12:02,268 INFO L356 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2022-07-23 06:12:02,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 53 [2022-07-23 06:12:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:12:02,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:02,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [236330290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:02,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:02,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 21 [2022-07-23 06:12:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723952930] [2022-07-23 06:12:02,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:12:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:12:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:12:02,767 INFO L87 Difference]: Start difference. First operand 492 states and 635 transitions. Second operand has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:12:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:06,214 INFO L93 Difference]: Finished difference Result 494 states and 638 transitions. [2022-07-23 06:12:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:12:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2022-07-23 06:12:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:06,217 INFO L225 Difference]: With dead ends: 494 [2022-07-23 06:12:06,217 INFO L226 Difference]: Without dead ends: 494 [2022-07-23 06:12:06,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=286, Invalid=903, Unknown=1, NotChecked=0, Total=1190 [2022-07-23 06:12:06,218 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 13 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:06,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1987 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 890 Invalid, 0 Unknown, 305 Unchecked, 1.3s Time] [2022-07-23 06:12:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-07-23 06:12:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2022-07-23 06:12:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 339 states have (on average 1.6725663716814159) internal successors, (567), 449 states have internal predecessors, (567), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:12:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 638 transitions. [2022-07-23 06:12:06,227 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 638 transitions. Word has length 43 [2022-07-23 06:12:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:06,227 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 638 transitions. [2022-07-23 06:12:06,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:12:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 638 transitions. [2022-07-23 06:12:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:12:06,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:06,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:06,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:06,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-07-23 06:12:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:06,634 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2022-07-23 06:12:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:06,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535508716] [2022-07-23 06:12:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:06,636 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:06,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-07-23 06:12:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:12:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:08,868 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 [2022-07-23 06:12:11,007 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:11,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:12:19,269 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:19,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-23 06:12:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 15 refuted. 4 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:19,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:20,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:20,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535508716] [2022-07-23 06:12:20,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535508716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:20,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734576243] [2022-07-23 06:12:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:20,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:20,368 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:20,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-07-23 06:12:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 06:12:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:20,615 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 9 treesize of output 3 [2022-07-23 06:12:20,732 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:20,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:12:20,756 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:20,757 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 [2022-07-23 06:12:21,023 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:21,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:12:21,051 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:21,051 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 13 treesize of output 13 [2022-07-23 06:12:21,342 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:21,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:12:21,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:12:22,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:22,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 06:12:23,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734576243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:23,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:23,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2022-07-23 06:12:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612012148] [2022-07-23 06:12:23,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:23,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 06:12:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 06:12:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=853, Unknown=6, NotChecked=0, Total=1056 [2022-07-23 06:12:23,068 INFO L87 Difference]: Start difference. First operand 494 states and 638 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:12:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:29,511 INFO L93 Difference]: Finished difference Result 494 states and 637 transitions. [2022-07-23 06:12:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 06:12:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2022-07-23 06:12:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:29,514 INFO L225 Difference]: With dead ends: 494 [2022-07-23 06:12:29,514 INFO L226 Difference]: Without dead ends: 494 [2022-07-23 06:12:29,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=329, Invalid=1469, Unknown=8, NotChecked=0, Total=1806 [2022-07-23 06:12:29,515 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 19 mSDsluCounter, 2699 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1019 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3008 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 963 Invalid, 0 Unknown, 1019 Unchecked, 1.9s Time] [2022-07-23 06:12:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-07-23 06:12:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2022-07-23 06:12:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 339 states have (on average 1.6696165191740413) internal successors, (566), 449 states have internal predecessors, (566), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:12:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 637 transitions. [2022-07-23 06:12:29,523 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 637 transitions. Word has length 43 [2022-07-23 06:12:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:29,524 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 637 transitions. [2022-07-23 06:12:29,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:12:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 637 transitions. [2022-07-23 06:12:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 06:12:29,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:29,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:29,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-07-23 06:12:29,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-07-23 06:12:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,930 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2022-07-23 06:12:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:29,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513777806] [2022-07-23 06:12:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:29,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:29,932 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-07-23 06:12:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:30,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:12:30,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:30,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:30,133 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:30,133 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 [2022-07-23 06:12:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 06:12:30,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:12:30,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513777806] [2022-07-23 06:12:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513777806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:12:30,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:12:30,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:12:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704773377] [2022-07-23 06:12:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:12:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:12:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:12:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:12:30,146 INFO L87 Difference]: Start difference. First operand 494 states and 637 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:12:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:30,484 INFO L93 Difference]: Finished difference Result 493 states and 636 transitions. [2022-07-23 06:12:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:12:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-07-23 06:12:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:30,487 INFO L225 Difference]: With dead ends: 493 [2022-07-23 06:12:30,487 INFO L226 Difference]: Without dead ends: 493 [2022-07-23 06:12:30,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:30,487 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:30,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 724 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:12:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-23 06:12:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2022-07-23 06:12:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 339 states have (on average 1.6666666666666667) internal successors, (565), 448 states have internal predecessors, (565), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:12:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 636 transitions. [2022-07-23 06:12:30,493 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 636 transitions. Word has length 44 [2022-07-23 06:12:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:30,493 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 636 transitions. [2022-07-23 06:12:30,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 06:12:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 636 transitions. [2022-07-23 06:12:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 06:12:30,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:30,494 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:30,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-07-23 06:12:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:30,694 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2022-07-23 06:12:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590371554] [2022-07-23 06:12:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:30,696 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-07-23 06:12:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:12:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:30,957 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 14 treesize of output 16 [2022-07-23 06:12:30,968 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:30,969 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 [2022-07-23 06:12:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:12:30,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:33,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 50 treesize of output 46 [2022-07-23 06:12:33,224 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:33,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2022-07-23 06:12:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:12:33,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590371554] [2022-07-23 06:12:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590371554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:33,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:33,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-23 06:12:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188943699] [2022-07-23 06:12:33,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:33,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:12:33,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:12:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:12:33,537 INFO L87 Difference]: Start difference. First operand 493 states and 636 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-23 06:12:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:34,726 INFO L93 Difference]: Finished difference Result 492 states and 635 transitions. [2022-07-23 06:12:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:12:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2022-07-23 06:12:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:34,728 INFO L225 Difference]: With dead ends: 492 [2022-07-23 06:12:34,728 INFO L226 Difference]: Without dead ends: 492 [2022-07-23 06:12:34,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:12:34,729 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 238 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:34,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 2061 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 394 Invalid, 0 Unknown, 166 Unchecked, 1.1s Time] [2022-07-23 06:12:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-23 06:12:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-07-23 06:12:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 339 states have (on average 1.663716814159292) internal successors, (564), 447 states have internal predecessors, (564), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:12:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 635 transitions. [2022-07-23 06:12:34,737 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 635 transitions. Word has length 44 [2022-07-23 06:12:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:34,737 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 635 transitions. [2022-07-23 06:12:34,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-23 06:12:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 635 transitions. [2022-07-23 06:12:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:12:34,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:34,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-23 06:12:34,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:34,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:34,943 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 248981415, now seen corresponding path program 1 times [2022-07-23 06:12:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682685732] [2022-07-23 06:12:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:34,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:34,945 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:34,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-07-23 06:12:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:12:35,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:12:35,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 06:12:35,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682685732] [2022-07-23 06:12:35,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682685732] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:35,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:35,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:12:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354029272] [2022-07-23 06:12:35,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:12:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:12:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:12:35,537 INFO L87 Difference]: Start difference. First operand 492 states and 635 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:12:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:35,721 INFO L93 Difference]: Finished difference Result 609 states and 706 transitions. [2022-07-23 06:12:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:12:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-07-23 06:12:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:35,723 INFO L225 Difference]: With dead ends: 609 [2022-07-23 06:12:35,723 INFO L226 Difference]: Without dead ends: 609 [2022-07-23 06:12:35,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:12:35,723 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 297 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:35,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2079 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-07-23 06:12:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-07-23 06:12:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 494. [2022-07-23 06:12:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 341 states have (on average 1.6598240469208212) internal successors, (566), 449 states have internal predecessors, (566), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (42), 28 states have call predecessors, (42), 29 states have call successors, (42) [2022-07-23 06:12:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 637 transitions. [2022-07-23 06:12:35,731 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 637 transitions. Word has length 45 [2022-07-23 06:12:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:35,731 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 637 transitions. [2022-07-23 06:12:35,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:12:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 637 transitions. [2022-07-23 06:12:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:12:35,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:35,732 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:35,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:35,943 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2022-07-23 06:12:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:35,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227169942] [2022-07-23 06:12:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:35,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:35,945 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:35,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-07-23 06:12:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:12:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:36,230 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:12:36,230 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 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:12:36,345 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-23 06:12:36,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 06:12:36,430 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:36,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:12:36,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:12:36,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 06:12:36,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:38,722 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 15 treesize of output 7 [2022-07-23 06:12:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:12:38,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:38,848 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 06:12:38,848 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 28 treesize of output 27 [2022-07-23 06:12:38,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227169942] [2022-07-23 06:12:38,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227169942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629532110] [2022-07-23 06:12:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:38,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:38,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:38,974 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:38,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-07-23 06:12:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:12:39,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:41,457 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:12:41,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2022-07-23 06:12:41,712 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:41,713 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 17 treesize of output 21 [2022-07-23 06:12:41,886 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:41,886 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-23 06:12:41,897 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-23 06:12:41,897 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 13 treesize of output 7 [2022-07-23 06:12:42,048 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:42,048 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-07-23 06:12:42,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-23 06:12:42,253 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 [2022-07-23 06:12:42,342 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-23 06:12:42,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 10 [2022-07-23 06:12:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:12:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:42,456 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 06:12:42,457 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 28 treesize of output 27 [2022-07-23 06:12:42,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629532110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:42,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:42,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-07-23 06:12:42,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54122000] [2022-07-23 06:12:42,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:42,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 06:12:42,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 06:12:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=961, Unknown=3, NotChecked=0, Total=1122 [2022-07-23 06:12:42,634 INFO L87 Difference]: Start difference. First operand 494 states and 637 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-23 06:12:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:50,022 INFO L93 Difference]: Finished difference Result 526 states and 671 transitions. [2022-07-23 06:12:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:12:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2022-07-23 06:12:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:50,024 INFO L225 Difference]: With dead ends: 526 [2022-07-23 06:12:50,024 INFO L226 Difference]: Without dead ends: 526 [2022-07-23 06:12:50,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=264, Invalid=1453, Unknown=5, NotChecked=0, Total=1722 [2022-07-23 06:12:50,025 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 365 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 853 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:50,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 2995 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1115 Invalid, 0 Unknown, 853 Unchecked, 2.7s Time] [2022-07-23 06:12:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-23 06:12:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 512. [2022-07-23 06:12:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 359 states have (on average 1.6685236768802227) internal successors, (599), 467 states have internal predecessors, (599), 29 states have call successors, (29), 20 states have call predecessors, (29), 27 states have return successors, (41), 28 states have call predecessors, (41), 29 states have call successors, (41) [2022-07-23 06:12:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 669 transitions. [2022-07-23 06:12:50,032 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 669 transitions. Word has length 45 [2022-07-23 06:12:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:50,032 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 669 transitions. [2022-07-23 06:12:50,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-23 06:12:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 669 transitions. [2022-07-23 06:12:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:12:50,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:50,033 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:50,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-07-23 06:12:50,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-07-23 06:12:50,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:50,434 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-07-23 06:12:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2022-07-23 06:12:50,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923880242] [2022-07-23 06:12:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:50,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:50,436 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:50,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-07-23 06:12:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 06:12:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:50,995 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:50,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:12:51,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:12:51,030 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:51,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:12:51,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:12:51,146 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 [2022-07-23 06:12:51,437 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-23 06:12:51,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-07-23 06:12:51,461 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-23 06:12:51,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-07-23 06:12:51,735 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:51,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 102 [2022-07-23 06:12:52,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:52,899 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:52,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 38 [2022-07-23 06:12:52,907 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:52,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-07-23 06:12:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:53,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-23 06:12:54,631 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:54,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 141 [2022-07-23 06:12:55,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923880242] [2022-07-23 06:12:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923880242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873943370] [2022-07-23 06:12:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:55,613 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:55,614 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:55,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-07-23 06:12:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-23 06:12:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:56,300 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:56,300 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:12:56,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-23 06:12:56,322 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:12:56,323 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-07-23 06:12:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:56,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-23 06:12:56,444 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 [2022-07-23 06:12:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:56,825 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-23 06:12:56,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 39 [2022-07-23 06:12:56,860 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-23 06:12:56,861 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-07-23 06:12:57,238 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:12:57,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 111 [2022-07-23 06:12:58,515 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