./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:08:42,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:08:42,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:08:42,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:08:42,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:08:42,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:08:42,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:08:42,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:08:42,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:08:42,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:08:42,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:08:42,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:08:42,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:08:42,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:08:42,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:08:42,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:08:42,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:08:42,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:08:42,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:08:42,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:08:42,850 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:08:42,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:08:42,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:08:42,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:08:42,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:08:42,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:08:42,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:08:42,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:08:42,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:08:42,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:08:42,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:08:42,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:08:42,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:08:42,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:08:42,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:08:42,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:08:42,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:08:42,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:08:42,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:08:42,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:08:42,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:08:42,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:08:42,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:08:42,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:08:42,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:08:42,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:08:42,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:08:42,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:08:42,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:08:42,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:08:42,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:08:42,887 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:08:42,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:08:42,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:08:42,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:08:42,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:08:42,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:08:42,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:08:42,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:08:42,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:08:42,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:08:42,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:08:42,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:42,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:08:42,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:08:42,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:08:42,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:08:42,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-07-14 06:08:43,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:08:43,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:08:43,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:08:43,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:08:43,075 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:08:43,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-14 06:08:43,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b3acd2/be5cf9df21534f2aa527bdb84b782e86/FLAG6418bed06 [2022-07-14 06:08:43,510 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:08:43,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-14 06:08:43,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b3acd2/be5cf9df21534f2aa527bdb84b782e86/FLAG6418bed06 [2022-07-14 06:08:43,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b3acd2/be5cf9df21534f2aa527bdb84b782e86 [2022-07-14 06:08:43,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:08:43,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:08:43,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:43,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:08:43,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:08:43,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:43" (1/1) ... [2022-07-14 06:08:43,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d67f457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:43, skipping insertion in model container [2022-07-14 06:08:43,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:43" (1/1) ... [2022-07-14 06:08:43,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:08:43,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:43,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:43,781 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 06:08:43,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bba88a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:43, skipping insertion in model container [2022-07-14 06:08:43,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:43,784 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:08:43,785 INFO L158 Benchmark]: Toolchain (without parser) took 246.52ms. Allocated memory is still 109.1MB. Free memory was 79.0MB in the beginning and 79.9MB in the end (delta: -888.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:08:43,786 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:08:43,787 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.38ms. Allocated memory is still 109.1MB. Free memory was 78.8MB in the beginning and 79.9MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:08:43,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.38ms. Allocated memory is still 109.1MB. Free memory was 78.8MB in the beginning and 79.9MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: 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/array-memsafety/selectionsort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:08:45,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:08:45,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:08:45,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:08:45,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:08:45,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:08:45,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:08:45,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:08:45,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:08:45,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:08:45,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:08:45,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:08:45,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:08:45,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:08:45,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:08:45,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:08:45,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:08:45,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:08:45,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:08:45,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:08:45,340 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:08:45,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:08:45,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:08:45,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:08:45,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:08:45,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:08:45,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:08:45,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:08:45,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:08:45,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:08:45,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:08:45,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:08:45,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:08:45,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:08:45,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:08:45,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:08:45,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:08:45,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:08:45,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:08:45,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:08:45,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:08:45,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:08:45,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:08:45,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:08:45,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:08:45,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:08:45,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:08:45,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:08:45,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:08:45,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:08:45,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:08:45,386 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:08:45,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:08:45,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:08:45,396 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:08:45,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:08:45,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:08:45,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:08:45,398 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:08:45,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:08:45,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:08:45,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:08:45,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:08:45,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:08:45,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:45,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:08:45,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:08:45,399 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:08:45,399 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:08:45,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:08:45,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-07-14 06:08:45,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:08:45,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:08:45,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:08:45,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:08:45,705 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:08:45,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-14 06:08:45,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f68153d5/9b982a35ff3841a18d9cf580e226387f/FLAGb214bd00d [2022-07-14 06:08:46,137 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:08:46,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-14 06:08:46,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f68153d5/9b982a35ff3841a18d9cf580e226387f/FLAGb214bd00d [2022-07-14 06:08:46,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f68153d5/9b982a35ff3841a18d9cf580e226387f [2022-07-14 06:08:46,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:08:46,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:08:46,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:46,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:08:46,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:08:46,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e9633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46, skipping insertion in model container [2022-07-14 06:08:46,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:08:46,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:46,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:46,489 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:08:46,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:46,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:46,539 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:08:46,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:46,592 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:08:46,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46 WrapperNode [2022-07-14 06:08:46,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:46,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:08:46,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:08:46,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:08:46,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,647 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-14 06:08:46,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:08:46,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:08:46,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:08:46,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:08:46,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:08:46,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:08:46,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:08:46,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:08:46,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:46,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:08:46,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:08:46,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:08:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:08:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:08:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:08:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:08:46,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:08:46,902 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:08:46,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:08:47,186 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:08:47,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:08:47,191 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 06:08:47,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:08:47 BoogieIcfgContainer [2022-07-14 06:08:47,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:08:47,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:08:47,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:08:47,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:08:47,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:08:46" (1/3) ... [2022-07-14 06:08:47,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdbb780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:08:47, skipping insertion in model container [2022-07-14 06:08:47,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46" (2/3) ... [2022-07-14 06:08:47,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdbb780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:08:47, skipping insertion in model container [2022-07-14 06:08:47,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:08:47" (3/3) ... [2022-07-14 06:08:47,198 INFO L111 eAbstractionObserver]: Analyzing ICFG selectionsort-alloca-1.i [2022-07-14 06:08:47,218 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:08:47,218 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-14 06:08:47,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:08:47,254 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@75e53b43, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b9a3f57 [2022-07-14 06:08:47,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-14 06:08:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:47,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:47,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:47,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:47,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-14 06:08:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:47,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519552557] [2022-07-14 06:08:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:47,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:47,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:47,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:08:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:08:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:47,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:47,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:47,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:47,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519552557] [2022-07-14 06:08:47,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519552557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:47,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:47,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:08:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82077621] [2022-07-14 06:08:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:47,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:08:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:08:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:08:47,424 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:47,532 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-07-14 06:08:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:08:47,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:08:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:47,539 INFO L225 Difference]: With dead ends: 40 [2022-07-14 06:08:47,539 INFO L226 Difference]: Without dead ends: 38 [2022-07-14 06:08:47,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:08:47,543 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:47,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:08:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-14 06:08:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-14 06:08:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-14 06:08:47,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-07-14 06:08:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:47,570 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-14 06:08:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-14 06:08:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:47,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:47,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:47,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 06:08:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:47,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-07-14 06:08:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460003543] [2022-07-14 06:08:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:47,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:47,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:47,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:08:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:08:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:47,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:47,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:47,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460003543] [2022-07-14 06:08:47,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460003543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:47,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:47,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:08:47,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568673858] [2022-07-14 06:08:47,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:47,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:47,894 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:48,102 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-07-14 06:08:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:08:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:48,106 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:08:48,106 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 06:08:48,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:48,107 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:48,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:08:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 06:08:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-07-14 06:08:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-07-14 06:08:48,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-07-14 06:08:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:48,112 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-07-14 06:08:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-07-14 06:08:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:48,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:48,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:48,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:48,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-14 06:08:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778703395] [2022-07-14 06:08:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:48,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:48,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:48,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:48,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:08:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:08:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:48,407 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 8 treesize of output 7 [2022-07-14 06:08:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:48,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:48,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778703395] [2022-07-14 06:08:48,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778703395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:48,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:48,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:08:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218997352] [2022-07-14 06:08:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:48,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:48,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:48,457 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:48,479 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-14 06:08:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:08:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:48,483 INFO L225 Difference]: With dead ends: 43 [2022-07-14 06:08:48,483 INFO L226 Difference]: Without dead ends: 43 [2022-07-14 06:08:48,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:48,484 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-14 06:08:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-14 06:08:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-07-14 06:08:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-14 06:08:48,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2022-07-14 06:08:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:48,488 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-14 06:08:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-14 06:08:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:08:48,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:48,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:48,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-14 06:08:48,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:48,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052114, now seen corresponding path program 1 times [2022-07-14 06:08:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:48,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258473029] [2022-07-14 06:08:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:48,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:48,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:48,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:08:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:08:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:48,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:48,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:48,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258473029] [2022-07-14 06:08:48,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258473029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:48,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:48,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852051226] [2022-07-14 06:08:48,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:48,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:48,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:48,752 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:48,778 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-14 06:08:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-14 06:08:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:48,779 INFO L225 Difference]: With dead ends: 44 [2022-07-14 06:08:48,779 INFO L226 Difference]: Without dead ends: 44 [2022-07-14 06:08:48,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:48,780 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:48,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-14 06:08:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-14 06:08:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-14 06:08:48,783 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2022-07-14 06:08:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:48,784 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-14 06:08:48,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-14 06:08:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:08:48,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:48,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:48,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:49,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-07-14 06:08:49,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:49,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647640822] [2022-07-14 06:08:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:49,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:08:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:08:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:49,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:49,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647640822] [2022-07-14 06:08:49,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647640822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:49,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:49,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:08:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588713300] [2022-07-14 06:08:49,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:08:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:08:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:49,142 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:49,198 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-07-14 06:08:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:08:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:08:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:49,200 INFO L225 Difference]: With dead ends: 75 [2022-07-14 06:08:49,200 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 06:08:49,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:49,201 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:49,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 06:08:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-07-14 06:08:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-14 06:08:49,205 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-07-14 06:08:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:49,205 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-14 06:08:49,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-14 06:08:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:08:49,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:49,206 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:49,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:49,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-14 06:08:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:49,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975454468] [2022-07-14 06:08:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:49,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:49,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:08:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:08:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:49,492 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 8 treesize of output 7 [2022-07-14 06:08:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:49,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:49,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975454468] [2022-07-14 06:08:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975454468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:49,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:49,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-07-14 06:08:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466402233] [2022-07-14 06:08:49,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:08:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:08:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:08:49,924 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:50,286 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-07-14 06:08:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:08:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:08:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:50,288 INFO L225 Difference]: With dead ends: 83 [2022-07-14 06:08:50,288 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 06:08:50,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:08:50,289 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:50,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 189 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-07-14 06:08:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 06:08:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-07-14 06:08:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.5) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-07-14 06:08:50,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2022-07-14 06:08:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:50,294 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-07-14 06:08:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-07-14 06:08:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:08:50,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:50,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:50,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-14 06:08:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash 363893229, now seen corresponding path program 1 times [2022-07-14 06:08:50,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642958447] [2022-07-14 06:08:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:50,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:50,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:08:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:50,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:08:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:50,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:50,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:50,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642958447] [2022-07-14 06:08:50,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642958447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:50,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:50,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528490273] [2022-07-14 06:08:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:08:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:08:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:50,600 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:50,603 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-14 06:08:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:50,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:08:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:50,605 INFO L225 Difference]: With dead ends: 62 [2022-07-14 06:08:50,606 INFO L226 Difference]: Without dead ends: 60 [2022-07-14 06:08:50,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:50,607 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:50,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-07-14 06:08:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-14 06:08:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-07-14 06:08:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-07-14 06:08:50,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 13 [2022-07-14 06:08:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:50,611 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-07-14 06:08:50,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-07-14 06:08:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:08:50,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:50,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:50,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 06:08:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 363893953, now seen corresponding path program 1 times [2022-07-14 06:08:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348641946] [2022-07-14 06:08:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:50,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:50,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:50,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:08:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:08:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:50,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:50,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348641946] [2022-07-14 06:08:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348641946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:50,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631294104] [2022-07-14 06:08:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:50,881 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:50,924 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-07-14 06:08:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:08:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:50,925 INFO L225 Difference]: With dead ends: 57 [2022-07-14 06:08:50,925 INFO L226 Difference]: Without dead ends: 49 [2022-07-14 06:08:50,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:50,926 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:50,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-14 06:08:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-14 06:08:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.542857142857143) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-14 06:08:50,928 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 13 [2022-07-14 06:08:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:50,928 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-14 06:08:50,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-14 06:08:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:08:50,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:50,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:50,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:51,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958531, now seen corresponding path program 1 times [2022-07-14 06:08:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:51,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563911102] [2022-07-14 06:08:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:51,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:51,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:51,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:08:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:08:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:51,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:51,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:51,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563911102] [2022-07-14 06:08:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563911102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:51,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:51,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:08:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014320174] [2022-07-14 06:08:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:51,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:51,233 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:51,399 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-14 06:08:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:51,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:08:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:51,400 INFO L225 Difference]: With dead ends: 43 [2022-07-14 06:08:51,400 INFO L226 Difference]: Without dead ends: 43 [2022-07-14 06:08:51,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:51,400 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:51,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:08:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-14 06:08:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-14 06:08:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-14 06:08:51,403 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 13 [2022-07-14 06:08:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:51,403 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-14 06:08:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-14 06:08:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:08:51,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:51,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:51,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:51,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958532, now seen corresponding path program 1 times [2022-07-14 06:08:51,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445319436] [2022-07-14 06:08:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:51,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:08:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:08:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:51,667 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 8 treesize of output 7 [2022-07-14 06:08:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:51,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:52,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:52,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445319436] [2022-07-14 06:08:52,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445319436] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:52,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:08:52,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-07-14 06:08:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698807606] [2022-07-14 06:08:52,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:08:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:08:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:08:52,073 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:52,353 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-14 06:08:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:08:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:52,355 INFO L225 Difference]: With dead ends: 50 [2022-07-14 06:08:52,355 INFO L226 Difference]: Without dead ends: 50 [2022-07-14 06:08:52,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:08:52,356 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:52,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:08:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-14 06:08:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-14 06:08:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-14 06:08:52,358 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 13 [2022-07-14 06:08:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:52,358 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-14 06:08:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-14 06:08:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:08:52,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:52,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:52,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:52,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-07-14 06:08:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:52,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376199520] [2022-07-14 06:08:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:52,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:52,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:08:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:08:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:52,613 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 8 treesize of output 7 [2022-07-14 06:08:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:52,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:52,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:52,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376199520] [2022-07-14 06:08:52,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376199520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:52,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:08:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837081854] [2022-07-14 06:08:52,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:08:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:08:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:08:52,747 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:52,973 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-07-14 06:08:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:08:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:08:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:52,974 INFO L225 Difference]: With dead ends: 64 [2022-07-14 06:08:52,974 INFO L226 Difference]: Without dead ends: 64 [2022-07-14 06:08:52,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:08:52,975 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:52,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 46 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-14 06:08:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-14 06:08:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-14 06:08:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.372093023255814) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-07-14 06:08:52,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 13 [2022-07-14 06:08:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:52,978 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-07-14 06:08:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-07-14 06:08:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:08:52,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:52,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:52,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,185 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-07-14 06:08:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754772193] [2022-07-14 06:08:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:53,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:53,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:08:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:08:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:53,236 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 8 treesize of output 7 [2022-07-14 06:08:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:53,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:53,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754772193] [2022-07-14 06:08:53,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754772193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:53,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:53,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:08:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561317841] [2022-07-14 06:08:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:08:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:08:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:08:53,671 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:53,695 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-14 06:08:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:08:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-14 06:08:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:53,696 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:08:53,696 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:08:53,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:53,697 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:53,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-07-14 06:08:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:08:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-14 06:08:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-14 06:08:53,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2022-07-14 06:08:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:53,699 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-14 06:08:53,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-14 06:08:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:08:53,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:53,700 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-14 06:08:53,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-07-14 06:08:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:53,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762002203] [2022-07-14 06:08:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:08:53,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:53,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:53,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:08:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:08:53,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:08:53,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:53,978 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 8 treesize of output 7 [2022-07-14 06:08:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:54,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:54,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762002203] [2022-07-14 06:08:54,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762002203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:54,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:54,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 06:08:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519130623] [2022-07-14 06:08:54,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:08:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:08:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:08:54,827 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:56,955 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2022-07-14 06:08:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:08:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:08:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:56,958 INFO L225 Difference]: With dead ends: 227 [2022-07-14 06:08:56,958 INFO L226 Difference]: Without dead ends: 227 [2022-07-14 06:08:56,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:08:56,959 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 431 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:56,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 281 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 305 Invalid, 0 Unknown, 60 Unchecked, 1.1s Time] [2022-07-14 06:08:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-14 06:08:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 67. [2022-07-14 06:08:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-07-14 06:08:56,962 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 18 [2022-07-14 06:08:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:56,962 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-07-14 06:08:56,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-07-14 06:08:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:08:56,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:56,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:56,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash -511715546, now seen corresponding path program 1 times [2022-07-14 06:08:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:57,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219211182] [2022-07-14 06:08:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:57,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:57,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:08:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:08:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:57,247 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 8 treesize of output 7 [2022-07-14 06:08:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:57,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:58,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:58,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219211182] [2022-07-14 06:08:58,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219211182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:58,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:58,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-07-14 06:08:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675086097] [2022-07-14 06:08:58,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:58,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:08:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:08:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:08:58,230 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:58,917 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-14 06:08:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:08:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:08:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:58,919 INFO L225 Difference]: With dead ends: 71 [2022-07-14 06:08:58,919 INFO L226 Difference]: Without dead ends: 67 [2022-07-14 06:08:58,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:08:58,919 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:58,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 160 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 73 Unchecked, 0.6s Time] [2022-07-14 06:08:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-14 06:08:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-14 06:08:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-07-14 06:08:58,926 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 18 [2022-07-14 06:08:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:58,926 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-07-14 06:08:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-07-14 06:08:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:08:58,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:58,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:58,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-14 06:08:59,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,128 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:08:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243625, now seen corresponding path program 2 times [2022-07-14 06:08:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:59,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953425941] [2022-07-14 06:08:59,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:08:59,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:59,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:08:59,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:08:59,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:08:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:59,194 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 8 treesize of output 7 [2022-07-14 06:08:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:08:59,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:00,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953425941] [2022-07-14 06:09:00,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953425941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:00,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-14 06:09:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804313077] [2022-07-14 06:09:00,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:09:00,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:09:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:09:00,301 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:04,075 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-07-14 06:09:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:09:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:09:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:04,077 INFO L225 Difference]: With dead ends: 151 [2022-07-14 06:09:04,077 INFO L226 Difference]: Without dead ends: 151 [2022-07-14 06:09:04,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:09:04,078 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 495 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 104 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 282 Invalid, 0 Unknown, 37 Unchecked, 1.8s Time] [2022-07-14 06:09:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-14 06:09:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-07-14 06:09:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.380952380952381) internal successors, (116), 90 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2022-07-14 06:09:04,081 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 22 [2022-07-14 06:09:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:04,081 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2022-07-14 06:09:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2022-07-14 06:09:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:09:04,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:04,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:04,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:04,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1653055190, now seen corresponding path program 1 times [2022-07-14 06:09:04,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229054129] [2022-07-14 06:09:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:04,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:04,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:04,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:04,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:09:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:09:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:04,382 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 8 treesize of output 7 [2022-07-14 06:09:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:05,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229054129] [2022-07-14 06:09:05,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229054129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:05,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:05,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-14 06:09:05,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406695624] [2022-07-14 06:09:05,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:05,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:05,680 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:06,011 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-07-14 06:09:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 06:09:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:06,012 INFO L225 Difference]: With dead ends: 95 [2022-07-14 06:09:06,012 INFO L226 Difference]: Without dead ends: 95 [2022-07-14 06:09:06,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:06,013 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:06,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-07-14 06:09:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-14 06:09:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-07-14 06:09:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 93 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-07-14 06:09:06,015 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 23 [2022-07-14 06:09:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:06,015 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-07-14 06:09:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-07-14 06:09:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:09:06,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:06,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:06,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:06,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1651208148, now seen corresponding path program 1 times [2022-07-14 06:09:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888013487] [2022-07-14 06:09:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:06,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:06,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:06,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:09:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:09:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:06,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:09:06,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:06,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888013487] [2022-07-14 06:09:06,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888013487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:06,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:06,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:09:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212864461] [2022-07-14 06:09:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:06,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:09:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:09:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:06,406 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:06,662 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-07-14 06:09:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:06,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 06:09:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:06,664 INFO L225 Difference]: With dead ends: 132 [2022-07-14 06:09:06,664 INFO L226 Difference]: Without dead ends: 132 [2022-07-14 06:09:06,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:09:06,665 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:06,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 68 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-14 06:09:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2022-07-14 06:09:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 108 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2022-07-14 06:09:06,667 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 23 [2022-07-14 06:09:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:06,667 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2022-07-14 06:09:06,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2022-07-14 06:09:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:09:06,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:06,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:06,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:06,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:06,869 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 294852956, now seen corresponding path program 1 times [2022-07-14 06:09:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:06,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972540945] [2022-07-14 06:09:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:06,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:06,872 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:06,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:09:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:09:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:06,974 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 8 treesize of output 7 [2022-07-14 06:09:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:07,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:08,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972540945] [2022-07-14 06:09:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972540945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:08,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:08,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-14 06:09:08,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363532506] [2022-07-14 06:09:08,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:08,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:08,079 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:08,694 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2022-07-14 06:09:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:08,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-14 06:09:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:08,696 INFO L225 Difference]: With dead ends: 109 [2022-07-14 06:09:08,696 INFO L226 Difference]: Without dead ends: 109 [2022-07-14 06:09:08,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:08,697 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:08,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-07-14 06:09:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-14 06:09:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-07-14 06:09:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.34) internal successors, (134), 105 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2022-07-14 06:09:08,699 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 24 [2022-07-14 06:09:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2022-07-14 06:09:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2022-07-14 06:09:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:09:08,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:08,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:08,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:08,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash -623576636, now seen corresponding path program 2 times [2022-07-14 06:09:08,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:08,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144074085] [2022-07-14 06:09:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:08,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:08,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:08,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:09:09,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:09:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:09,049 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 8 treesize of output 7 [2022-07-14 06:09:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:11,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:11,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144074085] [2022-07-14 06:09:11,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144074085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:11,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-14 06:09:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962202791] [2022-07-14 06:09:11,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:09:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:09:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:11,129 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:13,984 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-14 06:09:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:09:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:09:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:13,985 INFO L225 Difference]: With dead ends: 132 [2022-07-14 06:09:13,985 INFO L226 Difference]: Without dead ends: 132 [2022-07-14 06:09:13,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:09:13,986 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:13,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 136 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 42 Unchecked, 0.7s Time] [2022-07-14 06:09:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-14 06:09:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-14 06:09:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.375) internal successors, (165), 125 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2022-07-14 06:09:13,988 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 28 [2022-07-14 06:09:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:13,989 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2022-07-14 06:09:13,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2022-07-14 06:09:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:09:13,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:13,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:13,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:14,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:14,199 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash -621729594, now seen corresponding path program 1 times [2022-07-14 06:09:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:14,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260516201] [2022-07-14 06:09:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:14,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:14,201 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:14,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:09:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:09:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:14,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:14,494 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 11 treesize of output 9 [2022-07-14 06:09:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:14,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260516201] [2022-07-14 06:09:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260516201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:14,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:14,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:09:14,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449863046] [2022-07-14 06:09:14,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:09:14,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:09:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:09:14,776 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,071 INFO L93 Difference]: Finished difference Result 245 states and 291 transitions. [2022-07-14 06:09:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:09:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:09:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,072 INFO L225 Difference]: With dead ends: 245 [2022-07-14 06:09:17,072 INFO L226 Difference]: Without dead ends: 245 [2022-07-14 06:09:17,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=352, Invalid=838, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:09:17,073 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 356 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 114 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 06:09:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-14 06:09:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 119. [2022-07-14 06:09:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 118 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2022-07-14 06:09:17,076 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 28 [2022-07-14 06:09:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,076 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2022-07-14 06:09:17,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2022-07-14 06:09:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:09:17,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:17,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:17,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2143917058, now seen corresponding path program 2 times [2022-07-14 06:09:17,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:17,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621668354] [2022-07-14 06:09:17,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:17,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:17,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:17,286 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:17,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:09:17,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:17,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:09:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:17,360 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 8 treesize of output 7 [2022-07-14 06:09:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:17,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:18,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621668354] [2022-07-14 06:09:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621668354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:18,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:18,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-14 06:09:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807015894] [2022-07-14 06:09:18,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:09:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:09:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:18,831 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:20,830 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-14 06:09:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:09:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-14 06:09:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:20,832 INFO L225 Difference]: With dead ends: 132 [2022-07-14 06:09:20,832 INFO L226 Difference]: Without dead ends: 132 [2022-07-14 06:09:20,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:09:20,833 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:20,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 139 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-07-14 06:09:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-14 06:09:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2022-07-14 06:09:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 114 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2022-07-14 06:09:20,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 29 [2022-07-14 06:09:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:20,835 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2022-07-14 06:09:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2022-07-14 06:09:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:09:20,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:20,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-14 06:09:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:21,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:21,043 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1767402818, now seen corresponding path program 1 times [2022-07-14 06:09:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271799324] [2022-07-14 06:09:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:21,046 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:09:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:21,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:09:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:09:21,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:09:21,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271799324] [2022-07-14 06:09:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271799324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:21,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:21,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003497264] [2022-07-14 06:09:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:21,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:21,249 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:21,252 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2022-07-14 06:09:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:21,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-14 06:09:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:21,253 INFO L225 Difference]: With dead ends: 114 [2022-07-14 06:09:21,253 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:09:21,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:21,253 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:21,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-14 06:09:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:09:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-14 06:09:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 111 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2022-07-14 06:09:21,256 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 31 [2022-07-14 06:09:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:21,256 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2022-07-14 06:09:21,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2022-07-14 06:09:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:09:21,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:21,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:21,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:21,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:21,464 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1767403543, now seen corresponding path program 1 times [2022-07-14 06:09:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:21,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652636147] [2022-07-14 06:09:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:21,466 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:09:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:09:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:21,548 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 8 treesize of output 7 [2022-07-14 06:09:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:22,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:22,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652636147] [2022-07-14 06:09:22,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652636147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:22,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:22,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-14 06:09:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052740074] [2022-07-14 06:09:22,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:22,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:22,845 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:24,328 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-07-14 06:09:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:09:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-14 06:09:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:24,329 INFO L225 Difference]: With dead ends: 142 [2022-07-14 06:09:24,329 INFO L226 Difference]: Without dead ends: 142 [2022-07-14 06:09:24,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:09:24,330 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:24,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-07-14 06:09:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-14 06:09:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2022-07-14 06:09:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.3643410852713178) internal successors, (176), 133 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2022-07-14 06:09:24,332 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 31 [2022-07-14 06:09:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:24,332 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2022-07-14 06:09:24,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2022-07-14 06:09:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:09:24,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:24,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:24,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:24,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1767403589, now seen corresponding path program 1 times [2022-07-14 06:09:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:24,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843412064] [2022-07-14 06:09:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:24,542 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:24,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:09:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:09:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:24,630 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 8 treesize of output 7 [2022-07-14 06:09:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:25,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:26,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:26,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843412064] [2022-07-14 06:09:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843412064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:26,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:26,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-07-14 06:09:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777984189] [2022-07-14 06:09:26,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:26,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:09:26,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:09:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:09:26,062 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:30,487 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2022-07-14 06:09:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:09:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-14 06:09:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:30,488 INFO L225 Difference]: With dead ends: 195 [2022-07-14 06:09:30,488 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:09:30,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:09:30,489 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 650 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:30,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 62 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-14 06:09:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:09:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-07-14 06:09:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.366412213740458) internal successors, (179), 135 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2022-07-14 06:09:30,491 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 31 [2022-07-14 06:09:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:30,491 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2022-07-14 06:09:30,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2022-07-14 06:09:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:09:30,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:30,492 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:30,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:30,700 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash 276218793, now seen corresponding path program 3 times [2022-07-14 06:09:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378291458] [2022-07-14 06:09:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:30,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:30,703 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:30,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 06:09:30,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:09:30,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:09:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:30,845 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 8 treesize of output 7 [2022-07-14 06:09:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:33,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378291458] [2022-07-14 06:09:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378291458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:33,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:33,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-14 06:09:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329121582] [2022-07-14 06:09:33,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:33,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:09:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:09:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:09:33,941 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:43,936 INFO L93 Difference]: Finished difference Result 160 states and 201 transitions. [2022-07-14 06:09:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:09:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-14 06:09:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:43,937 INFO L225 Difference]: With dead ends: 160 [2022-07-14 06:09:43,937 INFO L226 Difference]: Without dead ends: 152 [2022-07-14 06:09:43,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:09:43,937 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 401 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 124 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-14 06:09:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-14 06:09:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2022-07-14 06:09:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.3529411764705883) internal successors, (184), 140 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2022-07-14 06:09:43,940 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 32 [2022-07-14 06:09:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:43,940 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2022-07-14 06:09:43,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2022-07-14 06:09:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:09:43,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:43,940 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-07-14 06:09:43,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:44,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:44,150 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-07-14 06:09:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304117552] [2022-07-14 06:09:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:44,152 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:44,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:09:44,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:09:44,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:09:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:44,285 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 8 treesize of output 7 [2022-07-14 06:09:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:44,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:46,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304117552] [2022-07-14 06:09:46,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304117552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:46,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:46,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-14 06:09:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849918519] [2022-07-14 06:09:46,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:46,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:09:46,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:09:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:09:46,090 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:54,491 INFO L93 Difference]: Finished difference Result 1339 states and 1808 transitions. [2022-07-14 06:09:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:09:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-14 06:09:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:54,495 INFO L225 Difference]: With dead ends: 1339 [2022-07-14 06:09:54,495 INFO L226 Difference]: Without dead ends: 1339 [2022-07-14 06:09:54,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:09:54,496 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1565 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:54,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1565 Valid, 624 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 897 Invalid, 0 Unknown, 99 Unchecked, 2.9s Time] [2022-07-14 06:09:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-07-14 06:09:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 173. [2022-07-14 06:09:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.3333333333333333) internal successors, (224), 172 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2022-07-14 06:09:54,510 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 34 [2022-07-14 06:09:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:54,510 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2022-07-14 06:09:54,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2022-07-14 06:09:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:09:54,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:54,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:54,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:54,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:54,719 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash 605983569, now seen corresponding path program 1 times [2022-07-14 06:09:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512718077] [2022-07-14 06:09:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:54,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:54,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 06:09:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:54,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:09:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:54,838 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 8 treesize of output 7 [2022-07-14 06:09:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:09:55,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:09:56,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:56,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512718077] [2022-07-14 06:09:56,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512718077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:56,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:56,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-07-14 06:09:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390128305] [2022-07-14 06:09:56,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:09:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:09:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:09:56,121 INFO L87 Difference]: Start difference. First operand 173 states and 224 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:56,422 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2022-07-14 06:09:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:09:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:09:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:56,424 INFO L225 Difference]: With dead ends: 191 [2022-07-14 06:09:56,424 INFO L226 Difference]: Without dead ends: 191 [2022-07-14 06:09:56,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:09:56,424 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:56,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-07-14 06:09:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-14 06:09:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2022-07-14 06:09:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3296703296703296) internal successors, (242), 186 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2022-07-14 06:09:56,427 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 41 [2022-07-14 06:09:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:56,427 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2022-07-14 06:09:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2022-07-14 06:09:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:09:56,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:56,427 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:56,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:56,637 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:09:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1927265964, now seen corresponding path program 4 times [2022-07-14 06:09:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:56,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939511391] [2022-07-14 06:09:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:56,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:56,639 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:56,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:09:56,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:09:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:56,746 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 8 treesize of output 7 [2022-07-14 06:09:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 06:09:57,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:59,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939511391] [2022-07-14 06:09:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939511391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:59,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:59,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2022-07-14 06:09:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635158231] [2022-07-14 06:09:59,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:09:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:09:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:09:59,519 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:00,590 INFO L93 Difference]: Finished difference Result 204 states and 261 transitions. [2022-07-14 06:10:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:10:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:10:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:00,592 INFO L225 Difference]: With dead ends: 204 [2022-07-14 06:10:00,592 INFO L226 Difference]: Without dead ends: 202 [2022-07-14 06:10:00,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:10:00,593 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:00,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 181 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 265 Invalid, 0 Unknown, 58 Unchecked, 0.9s Time] [2022-07-14 06:10:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-14 06:10:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-07-14 06:10:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.317948717948718) internal successors, (257), 199 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2022-07-14 06:10:00,596 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 41 [2022-07-14 06:10:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:00,596 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2022-07-14 06:10:00,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2022-07-14 06:10:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:10:00,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:00,596 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:00,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-14 06:10:00,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:00,804 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1605577749, now seen corresponding path program 1 times [2022-07-14 06:10:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:00,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228223892] [2022-07-14 06:10:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:00,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:00,806 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:00,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 06:10:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:10:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:00,929 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 8 treesize of output 7 [2022-07-14 06:10:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:10:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:10:02,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228223892] [2022-07-14 06:10:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228223892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:02,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-07-14 06:10:02,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517534912] [2022-07-14 06:10:02,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:02,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:10:02,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:10:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:10:02,277 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:02,503 INFO L93 Difference]: Finished difference Result 207 states and 263 transitions. [2022-07-14 06:10:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:10:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-14 06:10:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:02,505 INFO L225 Difference]: With dead ends: 207 [2022-07-14 06:10:02,505 INFO L226 Difference]: Without dead ends: 207 [2022-07-14 06:10:02,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:10:02,505 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 103 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-14 06:10:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-14 06:10:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-07-14 06:10:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.317948717948718) internal successors, (257), 199 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2022-07-14 06:10:02,508 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 42 [2022-07-14 06:10:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2022-07-14 06:10:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2022-07-14 06:10:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:10:02,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:02,508 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:02,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:02,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:02,709 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:02,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1261948553, now seen corresponding path program 5 times [2022-07-14 06:10:02,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:02,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029601437] [2022-07-14 06:10:02,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:02,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:02,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:02,732 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:02,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:10:02,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 06:10:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:02,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:10:02,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:02,965 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 8 treesize of output 7 [2022-07-14 06:10:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:08,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029601437] [2022-07-14 06:10:08,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029601437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:08,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:08,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2022-07-14 06:10:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311897000] [2022-07-14 06:10:08,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:10:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:10:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:10:08,271 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:13,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:10:18,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:10:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:23,250 INFO L93 Difference]: Finished difference Result 320 states and 409 transitions. [2022-07-14 06:10:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-14 06:10:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-14 06:10:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:23,252 INFO L225 Difference]: With dead ends: 320 [2022-07-14 06:10:23,252 INFO L226 Difference]: Without dead ends: 318 [2022-07-14 06:10:23,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:10:23,254 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:23,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 292 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 237 Unchecked, 5.7s Time] [2022-07-14 06:10:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-14 06:10:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 213. [2022-07-14 06:10:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.3125) internal successors, (273), 212 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 273 transitions. [2022-07-14 06:10:23,257 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 273 transitions. Word has length 45 [2022-07-14 06:10:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 273 transitions. [2022-07-14 06:10:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 273 transitions. [2022-07-14 06:10:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:10:23,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:23,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:23,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:23,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:23,464 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash 17747592, now seen corresponding path program 2 times [2022-07-14 06:10:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:23,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755745047] [2022-07-14 06:10:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:23,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:23,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:23,466 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:23,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:10:23,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:10:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:23,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:10:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 06:10:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 06:10:25,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755745047] [2022-07-14 06:10:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755745047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:25,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:25,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-14 06:10:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929921966] [2022-07-14 06:10:25,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:10:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:10:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:10:25,149 INFO L87 Difference]: Start difference. First operand 213 states and 273 transitions. Second operand has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:26,026 INFO L93 Difference]: Finished difference Result 232 states and 298 transitions. [2022-07-14 06:10:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:10:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-14 06:10:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:26,028 INFO L225 Difference]: With dead ends: 232 [2022-07-14 06:10:26,028 INFO L226 Difference]: Without dead ends: 232 [2022-07-14 06:10:26,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:10:26,028 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:26,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 127 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-14 06:10:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-14 06:10:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2022-07-14 06:10:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.32) internal successors, (297), 229 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 297 transitions. [2022-07-14 06:10:26,031 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 297 transitions. Word has length 45 [2022-07-14 06:10:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:26,031 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 297 transitions. [2022-07-14 06:10:26,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 297 transitions. [2022-07-14 06:10:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:10:26,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:26,032 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:26,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:26,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:26,232 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash 17747638, now seen corresponding path program 2 times [2022-07-14 06:10:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159471887] [2022-07-14 06:10:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:26,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:26,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 06:10:26,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:10:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:26,367 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 8 treesize of output 7 [2022-07-14 06:10:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:29,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:29,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159471887] [2022-07-14 06:10:29,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159471887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:29,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:29,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-14 06:10:29,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531019138] [2022-07-14 06:10:29,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:29,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:10:29,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:10:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:10:29,232 INFO L87 Difference]: Start difference. First operand 230 states and 297 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:38,584 INFO L93 Difference]: Finished difference Result 510 states and 637 transitions. [2022-07-14 06:10:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-14 06:10:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-14 06:10:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:38,586 INFO L225 Difference]: With dead ends: 510 [2022-07-14 06:10:38,586 INFO L226 Difference]: Without dead ends: 510 [2022-07-14 06:10:38,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:10:38,587 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 576 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:38,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 169 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 681 Invalid, 0 Unknown, 57 Unchecked, 3.3s Time] [2022-07-14 06:10:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-14 06:10:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 364. [2022-07-14 06:10:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.317548746518106) internal successors, (473), 363 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 473 transitions. [2022-07-14 06:10:38,591 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 473 transitions. Word has length 45 [2022-07-14 06:10:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 473 transitions. [2022-07-14 06:10:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 473 transitions. [2022-07-14 06:10:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:10:38,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:38,592 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:38,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:38,793 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 550176765, now seen corresponding path program 2 times [2022-07-14 06:10:38,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:38,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501361475] [2022-07-14 06:10:38,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:38,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:38,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:38,795 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:10:38,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:10:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:38,915 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 8 treesize of output 7 [2022-07-14 06:10:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:39,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:41,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501361475] [2022-07-14 06:10:41,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501361475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:41,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:41,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-14 06:10:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35392696] [2022-07-14 06:10:41,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:41,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:10:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:10:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:10:41,140 INFO L87 Difference]: Start difference. First operand 364 states and 473 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:42,122 INFO L93 Difference]: Finished difference Result 381 states and 486 transitions. [2022-07-14 06:10:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:10:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 06:10:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:42,124 INFO L225 Difference]: With dead ends: 381 [2022-07-14 06:10:42,124 INFO L226 Difference]: Without dead ends: 381 [2022-07-14 06:10:42,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:10:42,126 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:42,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 158 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-07-14 06:10:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-14 06:10:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 360. [2022-07-14 06:10:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.3183098591549296) internal successors, (468), 359 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 468 transitions. [2022-07-14 06:10:42,130 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 468 transitions. Word has length 46 [2022-07-14 06:10:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:42,130 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 468 transitions. [2022-07-14 06:10:42,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 468 transitions. [2022-07-14 06:10:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:10:42,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:42,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:42,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:42,339 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash -124433175, now seen corresponding path program 2 times [2022-07-14 06:10:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:42,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965716301] [2022-07-14 06:10:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:42,368 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:42,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 06:10:42,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:42,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:10:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:42,523 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 8 treesize of output 7 [2022-07-14 06:10:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:43,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:45,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965716301] [2022-07-14 06:10:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965716301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:45,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:45,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-14 06:10:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960354294] [2022-07-14 06:10:45,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:10:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:10:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:10:45,184 INFO L87 Difference]: Start difference. First operand 360 states and 468 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:46,149 INFO L93 Difference]: Finished difference Result 376 states and 480 transitions. [2022-07-14 06:10:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:10:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-14 06:10:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:46,151 INFO L225 Difference]: With dead ends: 376 [2022-07-14 06:10:46,151 INFO L226 Difference]: Without dead ends: 376 [2022-07-14 06:10:46,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:10:46,152 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:46,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-07-14 06:10:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-14 06:10:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 351. [2022-07-14 06:10:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3150289017341041) internal successors, (455), 350 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 455 transitions. [2022-07-14 06:10:46,155 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 455 transitions. Word has length 47 [2022-07-14 06:10:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:46,155 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 455 transitions. [2022-07-14 06:10:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 455 transitions. [2022-07-14 06:10:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:10:46,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:46,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:46,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:46,375 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:10:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 387622886, now seen corresponding path program 6 times [2022-07-14 06:10:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:46,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848605260] [2022-07-14 06:10:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:46,377 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) [2022-07-14 06:10:46,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:10:46,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:10:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:10:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:46,602 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 8 treesize of output 7 [2022-07-14 06:10:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:10:47,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:10:49,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848605260] [2022-07-14 06:10:49,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848605260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:49,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:49,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-14 06:10:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806308184] [2022-07-14 06:10:49,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:10:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:10:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:10:49,746 INFO L87 Difference]: Start difference. First operand 351 states and 455 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:59,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:11:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:10,762 INFO L93 Difference]: Finished difference Result 591 states and 743 transitions. [2022-07-14 06:11:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:11:10,763 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-14 06:11:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:10,764 INFO L225 Difference]: With dead ends: 591 [2022-07-14 06:11:10,764 INFO L226 Difference]: Without dead ends: 591 [2022-07-14 06:11:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1056, Invalid=3104, Unknown=0, NotChecked=0, Total=4160 [2022-07-14 06:11:10,765 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 536 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 176 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 635 Invalid, 0 Unknown, 53 Unchecked, 5.6s Time] [2022-07-14 06:11:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-07-14 06:11:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 454. [2022-07-14 06:11:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.3474387527839644) internal successors, (605), 453 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 605 transitions. [2022-07-14 06:11:10,770 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 605 transitions. Word has length 49 [2022-07-14 06:11:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:10,770 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 605 transitions. [2022-07-14 06:11:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 605 transitions. [2022-07-14 06:11:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:11:10,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:10,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:10,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-14 06:11:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:10,979 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2146511183, now seen corresponding path program 2 times [2022-07-14 06:11:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838760668] [2022-07-14 06:11:10,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:11:10,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:10,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:10,982 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:11:10,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 06:11:11,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:11:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:11:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:11,134 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 8 treesize of output 7 [2022-07-14 06:11:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:12,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:13,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838760668] [2022-07-14 06:11:13,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838760668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:13,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:13,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-14 06:11:13,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807826240] [2022-07-14 06:11:13,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:13,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:11:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:11:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:11:13,942 INFO L87 Difference]: Start difference. First operand 454 states and 605 transitions. Second operand has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:20,996 INFO L93 Difference]: Finished difference Result 611 states and 793 transitions. [2022-07-14 06:11:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:11:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-14 06:11:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:20,998 INFO L225 Difference]: With dead ends: 611 [2022-07-14 06:11:20,998 INFO L226 Difference]: Without dead ends: 611 [2022-07-14 06:11:20,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=428, Invalid=1642, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:11:20,999 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:20,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 174 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 46 Unchecked, 1.2s Time] [2022-07-14 06:11:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-07-14 06:11:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 511. [2022-07-14 06:11:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 506 states have (on average 1.3537549407114624) internal successors, (685), 510 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 685 transitions. [2022-07-14 06:11:21,004 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 685 transitions. Word has length 50 [2022-07-14 06:11:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:21,004 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 685 transitions. [2022-07-14 06:11:21,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 685 transitions. [2022-07-14 06:11:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:11:21,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:21,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:21,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-14 06:11:21,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:21,212 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1195941585, now seen corresponding path program 3 times [2022-07-14 06:11:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690289699] [2022-07-14 06:11:21,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:21,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:21,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:21,214 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) [2022-07-14 06:11:21,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 06:11:21,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-14 06:11:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:11:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:21,330 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 8 treesize of output 7 [2022-07-14 06:11:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-14 06:11:21,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-14 06:11:22,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:22,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690289699] [2022-07-14 06:11:22,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690289699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:22,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:22,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2022-07-14 06:11:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403867952] [2022-07-14 06:11:22,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:11:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:11:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:11:22,197 INFO L87 Difference]: Start difference. First operand 511 states and 685 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:22,282 INFO L93 Difference]: Finished difference Result 590 states and 765 transitions. [2022-07-14 06:11:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:11:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-14 06:11:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:22,284 INFO L225 Difference]: With dead ends: 590 [2022-07-14 06:11:22,284 INFO L226 Difference]: Without dead ends: 590 [2022-07-14 06:11:22,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:11:22,284 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:22,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-14 06:11:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-14 06:11:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 478. [2022-07-14 06:11:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.3298097251585623) internal successors, (629), 477 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 629 transitions. [2022-07-14 06:11:22,290 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 629 transitions. Word has length 51 [2022-07-14 06:11:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:22,290 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 629 transitions. [2022-07-14 06:11:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 629 transitions. [2022-07-14 06:11:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:11:22,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:22,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:22,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:22,499 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1580560235, now seen corresponding path program 3 times [2022-07-14 06:11:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392562152] [2022-07-14 06:11:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:22,502 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) [2022-07-14 06:11:22,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-14 06:11:22,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-14 06:11:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:11:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:22,600 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 8 treesize of output 7 [2022-07-14 06:11:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-14 06:11:23,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:11:23,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:23,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392562152] [2022-07-14 06:11:23,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392562152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:11:23,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:11:23,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:11:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447655330] [2022-07-14 06:11:23,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:11:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:11:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:11:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:11:23,020 INFO L87 Difference]: Start difference. First operand 478 states and 629 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:23,084 INFO L93 Difference]: Finished difference Result 567 states and 736 transitions. [2022-07-14 06:11:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:11:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:11:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:23,085 INFO L225 Difference]: With dead ends: 567 [2022-07-14 06:11:23,085 INFO L226 Difference]: Without dead ends: 567 [2022-07-14 06:11:23,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:11:23,085 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:23,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 65 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-14 06:11:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-14 06:11:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 344. [2022-07-14 06:11:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2920353982300885) internal successors, (438), 343 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 438 transitions. [2022-07-14 06:11:23,089 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 438 transitions. Word has length 52 [2022-07-14 06:11:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:23,090 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 438 transitions. [2022-07-14 06:11:23,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 438 transitions. [2022-07-14 06:11:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:11:23,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:23,090 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:23,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:23,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:23,298 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash 558307894, now seen corresponding path program 3 times [2022-07-14 06:11:23,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:23,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247032453] [2022-07-14 06:11:23,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:23,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:23,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:23,300 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) [2022-07-14 06:11:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 06:11:23,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:11:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:11:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:23,596 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 8 treesize of output 7 [2022-07-14 06:11:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:24,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:26,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247032453] [2022-07-14 06:11:26,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247032453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:26,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:26,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-14 06:11:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657396482] [2022-07-14 06:11:26,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:11:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:11:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:11:26,737 INFO L87 Difference]: Start difference. First operand 344 states and 438 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:28,438 INFO L93 Difference]: Finished difference Result 435 states and 551 transitions. [2022-07-14 06:11:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:11:28,439 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-14 06:11:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:28,440 INFO L225 Difference]: With dead ends: 435 [2022-07-14 06:11:28,440 INFO L226 Difference]: Without dead ends: 434 [2022-07-14 06:11:28,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:11:28,441 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:28,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 161 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 225 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-07-14 06:11:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-14 06:11:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2022-07-14 06:11:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 426 states have (on average 1.2863849765258215) internal successors, (548), 430 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 548 transitions. [2022-07-14 06:11:28,445 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 548 transitions. Word has length 55 [2022-07-14 06:11:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:28,445 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 548 transitions. [2022-07-14 06:11:28,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 548 transitions. [2022-07-14 06:11:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:11:28,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:28,446 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:28,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:28,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:28,656 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1694913281, now seen corresponding path program 3 times [2022-07-14 06:11:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264982565] [2022-07-14 06:11:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:28,658 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:11:28,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-14 06:11:28,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-14 06:11:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:11:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 06:11:28,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:11:28,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264982565] [2022-07-14 06:11:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264982565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:11:28,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:11:28,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:11:28,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269861624] [2022-07-14 06:11:28,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:11:28,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:11:28,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:28,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:11:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:11:28,939 INFO L87 Difference]: Start difference. First operand 431 states and 548 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:29,010 INFO L93 Difference]: Finished difference Result 432 states and 537 transitions. [2022-07-14 06:11:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:11:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-14 06:11:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:29,012 INFO L225 Difference]: With dead ends: 432 [2022-07-14 06:11:29,012 INFO L226 Difference]: Without dead ends: 432 [2022-07-14 06:11:29,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:11:29,012 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 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 [2022-07-14 06:11:29,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:11:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-14 06:11:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2022-07-14 06:11:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 423 states have (on average 1.2576832151300237) internal successors, (532), 426 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 532 transitions. [2022-07-14 06:11:29,021 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 532 transitions. Word has length 58 [2022-07-14 06:11:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 532 transitions. [2022-07-14 06:11:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 532 transitions. [2022-07-14 06:11:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:11:29,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:29,022 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:29,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:29,223 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1970979329, now seen corresponding path program 4 times [2022-07-14 06:11:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334212918] [2022-07-14 06:11:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:11:29,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:29,225 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) [2022-07-14 06:11:29,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-14 06:11:29,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:11:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:11:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:29,404 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 8 treesize of output 7 [2022-07-14 06:11:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:30,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:32,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334212918] [2022-07-14 06:11:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334212918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:32,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:32,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-14 06:11:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122554689] [2022-07-14 06:11:32,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:11:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:11:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:11:32,609 INFO L87 Difference]: Start difference. First operand 427 states and 532 transitions. Second operand has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:43,287 INFO L93 Difference]: Finished difference Result 598 states and 733 transitions. [2022-07-14 06:11:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-14 06:11:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-14 06:11:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:43,290 INFO L225 Difference]: With dead ends: 598 [2022-07-14 06:11:43,290 INFO L226 Difference]: Without dead ends: 598 [2022-07-14 06:11:43,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1197, Invalid=3359, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:11:43,291 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 608 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:43,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 186 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 666 Invalid, 0 Unknown, 90 Unchecked, 2.8s Time] [2022-07-14 06:11:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-14 06:11:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2022-07-14 06:11:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 503 states have (on average 1.260437375745527) internal successors, (634), 506 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 634 transitions. [2022-07-14 06:11:43,296 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 634 transitions. Word has length 59 [2022-07-14 06:11:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:43,296 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 634 transitions. [2022-07-14 06:11:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 634 transitions. [2022-07-14 06:11:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:11:43,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:43,297 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:43,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-14 06:11:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:43,507 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:11:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -412330512, now seen corresponding path program 5 times [2022-07-14 06:11:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091234067] [2022-07-14 06:11:43,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:11:43,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:43,510 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) [2022-07-14 06:11:43,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-14 06:11:44,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:11:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:11:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:44,240 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 8 treesize of output 7 [2022-07-14 06:11:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 39 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:11:44,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:11:48,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091234067] [2022-07-14 06:11:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091234067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:48,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:48,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2022-07-14 06:11:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375283085] [2022-07-14 06:11:48,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:11:48,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:11:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:11:48,247 INFO L87 Difference]: Start difference. First operand 507 states and 634 transitions. Second operand has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:11,557 INFO L93 Difference]: Finished difference Result 565 states and 687 transitions. [2022-07-14 06:12:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-14 06:12:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-14 06:12:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:11,559 INFO L225 Difference]: With dead ends: 565 [2022-07-14 06:12:11,559 INFO L226 Difference]: Without dead ends: 565 [2022-07-14 06:12:11,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1133, Invalid=6007, Unknown=0, NotChecked=0, Total=7140 [2022-07-14 06:12:11,561 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 905 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:11,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 364 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-07-14 06:12:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-14 06:12:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 457. [2022-07-14 06:12:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.2582781456953642) internal successors, (570), 456 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 570 transitions. [2022-07-14 06:12:11,565 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 570 transitions. Word has length 63 [2022-07-14 06:12:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:11,565 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 570 transitions. [2022-07-14 06:12:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 570 transitions. [2022-07-14 06:12:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:12:11,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:11,566 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-07-14 06:12:11,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:11,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:12:11,766 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-14 06:12:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-07-14 06:12:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:12:11,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758159948] [2022-07-14 06:12:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:12:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:12:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:12:11,769 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) [2022-07-14 06:12:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-14 06:12:11,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:12:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:11,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:12:11,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:11,900 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 8 treesize of output 7 [2022-07-14 06:12:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:12:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:12:20,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:12:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758159948] [2022-07-14 06:12:20,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758159948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:20,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:12:20,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-07-14 06:12:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792493990] [2022-07-14 06:12:20,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:20,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:12:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:12:20,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:12:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:12:20,487 INFO L87 Difference]: Start difference. First operand 457 states and 570 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:30,831 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:12:33,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:35,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:37,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:47,333 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:13:02,268 WARN L233 SmtUtils]: Spent 14.38s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:13:05,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:07,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:09,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:28,565 WARN L233 SmtUtils]: Spent 13.67s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:13:31,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []