./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array01-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/array01-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:14,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:14,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:14,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:14,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:14,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:14,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:14,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:14,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:14,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:14,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:14,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:14,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:14,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:14,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:14,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:14,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:14,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:14,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:14,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:14,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:14,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:14,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:14,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:14,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:14,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:14,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:14,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:14,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:14,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:14,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:14,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:14,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:14,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:14,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:14,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:14,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:14,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:14,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:14,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:14,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:14,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 23:57:14,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:14,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:14,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:14,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:14,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:14,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:14,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:14,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:14,563 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:14,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:14,563 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:14,563 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:14,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:14,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:14,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:14,564 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:14,564 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:14,564 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:14,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:14,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:14,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:14,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:14,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:14,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:14,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:14,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:14,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:14,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:14,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 23:57:14,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 23:57:14,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:14,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-12-21 23:57:14,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:14,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:14,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:14,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:14,792 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:14,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-12-21 23:57:14,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373b8a849/493b39e39cfe4d89b649e25b003d698c/FLAGb0f09382a [2021-12-21 23:57:15,284 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:15,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-12-21 23:57:15,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373b8a849/493b39e39cfe4d89b649e25b003d698c/FLAGb0f09382a [2021-12-21 23:57:15,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373b8a849/493b39e39cfe4d89b649e25b003d698c [2021-12-21 23:57:15,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:15,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:15,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:15,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:15,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365f88a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:15,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:16,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:16,128 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 23:57:16,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3710af79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:16, skipping insertion in model container [2021-12-21 23:57:16,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:16,129 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 23:57:16,131 INFO L158 Benchmark]: Toolchain (without parser) took 307.44ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 54.3MB in the beginning and 82.0MB in the end (delta: -27.7MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-21 23:57:16,132 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 23:57:16,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.87ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 54.1MB in the beginning and 82.3MB in the end (delta: -28.2MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-21 23:57:16,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory is still 44.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.87ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 54.1MB in the beginning and 82.3MB in the end (delta: -28.2MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/array01-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:17,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:17,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:17,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:17,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:17,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:17,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:17,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:17,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:17,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:17,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:17,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:17,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:17,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:17,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:17,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:17,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:17,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:17,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:17,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:17,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:17,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:17,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:17,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:17,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:17,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:17,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:17,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:17,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:17,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:17,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:17,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:17,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:17,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:17,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:17,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:17,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:17,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:17,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:17,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:17,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:17,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 23:57:18,012 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:18,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:18,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:18,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:18,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:18,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:18,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:18,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:18,014 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:18,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:18,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:18,015 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:18,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:18,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:18,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:18,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 23:57:18,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-12-21 23:57:18,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:18,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:18,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:18,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:18,349 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:18,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-12-21 23:57:18,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce019686/8f4a564df36040bb8c0bab2fe6eeb14e/FLAG2e7ea26ba [2021-12-21 23:57:18,896 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:18,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-12-21 23:57:18,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce019686/8f4a564df36040bb8c0bab2fe6eeb14e/FLAG2e7ea26ba [2021-12-21 23:57:19,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce019686/8f4a564df36040bb8c0bab2fe6eeb14e [2021-12-21 23:57:19,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:19,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:19,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:19,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:19,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:19,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4581c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19, skipping insertion in model container [2021-12-21 23:57:19,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:19,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:19,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,713 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 23:57:19,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:19,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,783 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 23:57:19,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,854 INFO L208 MainTranslator]: Completed translation [2021-12-21 23:57:19,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19 WrapperNode [2021-12-21 23:57:19,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:19,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:19,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 23:57:19,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 23:57:19,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,919 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-21 23:57:19,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:19,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 23:57:19,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 23:57:19,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 23:57:19,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 23:57:19,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 23:57:19,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 23:57:19,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 23:57:19,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:19,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:19,977 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) [2021-12-21 23:57:19,979 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 [2021-12-21 23:57:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 23:57:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 23:57:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 23:57:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 23:57:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 23:57:20,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 23:57:20,112 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 23:57:20,113 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 23:57:20,413 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 23:57:20,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 23:57:20,418 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 23:57:20,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:20 BoogieIcfgContainer [2021-12-21 23:57:20,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 23:57:20,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 23:57:20,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 23:57:20,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 23:57:20,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:57:19" (1/3) ... [2021-12-21 23:57:20,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56011668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:20, skipping insertion in model container [2021-12-21 23:57:20,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (2/3) ... [2021-12-21 23:57:20,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56011668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:20, skipping insertion in model container [2021-12-21 23:57:20,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:20" (3/3) ... [2021-12-21 23:57:20,427 INFO L111 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2021-12-21 23:57:20,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 23:57:20,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-21 23:57:20,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 23:57:20,479 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 23:57:20,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-21 23:57:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:20,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 23:57:20,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845676040] [2021-12-21 23:57:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:20,527 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) [2021-12-21 23:57:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 23:57:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:20,693 INFO L387 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 [2021-12-21 23:57:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:20,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:20,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845676040] [2021-12-21 23:57:20,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845676040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:20,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:20,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:57:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717378265] [2021-12-21 23:57:20,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:20,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:57:20,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:57:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:20,744 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 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) [2021-12-21 23:57:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,820 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-21 23:57:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:57:20,823 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 [2021-12-21 23:57:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,829 INFO L225 Difference]: With dead ends: 30 [2021-12-21 23:57:20,829 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 23:57:20,831 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:20,836 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 23:57:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-21 23:57:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-21 23:57:20,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-12-21 23:57:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,872 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-21 23:57:20,872 INFO L471 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) [2021-12-21 23:57:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-21 23:57:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:20,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,082 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-21 23:57:21,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101159801] [2021-12-21 23:57:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,085 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) [2021-12-21 23:57:21,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 23:57:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,152 INFO L387 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 [2021-12-21 23:57:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:21,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101159801] [2021-12-21 23:57:21,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101159801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:21,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624561849] [2021-12-21 23:57:21,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:21,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,184 INFO L87 Difference]: Start difference. First operand 28 states and 31 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) [2021-12-21 23:57:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,341 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-21 23:57:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:21,342 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 [2021-12-21 23:57:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,343 INFO L225 Difference]: With dead ends: 57 [2021-12-21 23:57:21,343 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 23:57:21,343 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:21,344 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 23:57:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2021-12-21 23:57:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 30 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) [2021-12-21 23:57:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-21 23:57:21,349 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2021-12-21 23:57:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,350 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-21 23:57:21,350 INFO L471 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) [2021-12-21 23:57:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-21 23:57:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:21,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 23:57:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268817693] [2021-12-21 23:57:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,554 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) [2021-12-21 23:57:21,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 23:57:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,664 INFO L387 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 [2021-12-21 23:57:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:21,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268817693] [2021-12-21 23:57:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268817693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:21,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445652913] [2021-12-21 23:57:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:21,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,737 INFO L87 Difference]: Start difference. First operand 31 states and 34 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) [2021-12-21 23:57:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,766 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-21 23:57:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:21,767 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 [2021-12-21 23:57:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,768 INFO L225 Difference]: With dead ends: 33 [2021-12-21 23:57:21,768 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 23:57:21,768 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:21,769 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 23:57:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 23:57:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-21 23:57:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 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) [2021-12-21 23:57:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-21 23:57:21,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-21 23:57:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-21 23:57:21,775 INFO L471 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) [2021-12-21 23:57:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-21 23:57:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:21,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-21 23:57:21,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776450019] [2021-12-21 23:57:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,979 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) [2021-12-21 23:57:21,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 23:57:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,028 INFO L387 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 [2021-12-21 23:57:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:22,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776450019] [2021-12-21 23:57:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776450019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:22,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:22,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:22,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094410799] [2021-12-21 23:57:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:22,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:22,050 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:22,132 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-21 23:57:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:22,133 INFO L225 Difference]: With dead ends: 29 [2021-12-21 23:57:22,133 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 23:57:22,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:22,135 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:22,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 23:57:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 23:57:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-21 23:57:22,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-12-21 23:57:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:22,139 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-21 23:57:22,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-21 23:57:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:22,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:22,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:22,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:22,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-21 23:57:22,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050185008] [2021-12-21 23:57:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:22,349 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) [2021-12-21 23:57:22,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 23:57:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,422 INFO L387 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 [2021-12-21 23:57:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:22,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050185008] [2021-12-21 23:57:22,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050185008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:22,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:22,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:22,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379186691] [2021-12-21 23:57:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:22,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:22,558 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:22,589 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-21 23:57:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:22,591 INFO L225 Difference]: With dead ends: 32 [2021-12-21 23:57:22,591 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 23:57:22,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:22,593 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:22,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-12-21 23:57:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 23:57:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-21 23:57:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-21 23:57:22,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-12-21 23:57:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:22,602 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-21 23:57:22,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-21 23:57:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:22,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:22,604 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:22,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:22,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,813 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-21 23:57:22,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:22,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818897897] [2021-12-21 23:57:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:22,816 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) [2021-12-21 23:57:22,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 23:57:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818897897] [2021-12-21 23:57:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818897897] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:22,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:22,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:22,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511601934] [2021-12-21 23:57:22,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:22,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:22,976 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-12-21 23:57:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:23,042 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-12-21 23:57:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:23,046 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 [2021-12-21 23:57:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:23,047 INFO L225 Difference]: With dead ends: 52 [2021-12-21 23:57:23,047 INFO L226 Difference]: Without dead ends: 52 [2021-12-21 23:57:23,047 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:23,048 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:23,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-21 23:57:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-12-21 23:57:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-21 23:57:23,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-12-21 23:57:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:23,057 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-21 23:57:23,057 INFO L471 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) [2021-12-21 23:57:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-21 23:57:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:23,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:23,058 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:23,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:23,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 23:57:23,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804348797] [2021-12-21 23:57:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:23,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:23,261 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) [2021-12-21 23:57:23,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 23:57:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:57:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,355 INFO L387 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 [2021-12-21 23:57:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:24,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804348797] [2021-12-21 23:57:24,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804348797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:24,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:24,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:57:24,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927228335] [2021-12-21 23:57:24,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:57:24,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:57:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:24,034 INFO L87 Difference]: Start difference. First operand 36 states and 41 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) [2021-12-21 23:57:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:24,445 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-21 23:57:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:24,447 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 [2021-12-21 23:57:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:24,448 INFO L225 Difference]: With dead ends: 57 [2021-12-21 23:57:24,448 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 23:57:24,448 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:24,449 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:24,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 65 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-21 23:57:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 23:57:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-12-21 23:57:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 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) [2021-12-21 23:57:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-21 23:57:24,452 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-12-21 23:57:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:24,453 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-21 23:57:24,453 INFO L471 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) [2021-12-21 23:57:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-21 23:57:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:24,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:24,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:24,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:24,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:24,654 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-21 23:57:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324393910] [2021-12-21 23:57:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:24,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:24,656 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) [2021-12-21 23:57:24,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 23:57:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 23:57:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:24,725 INFO L387 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 [2021-12-21 23:57:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:24,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:24,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:24,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324393910] [2021-12-21 23:57:24,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324393910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:24,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:24,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:24,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197744625] [2021-12-21 23:57:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:24,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:24,800 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:24,993 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-21 23:57:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:24,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-21 23:57:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:24,994 INFO L225 Difference]: With dead ends: 69 [2021-12-21 23:57:24,994 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 23:57:24,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:57:24,995 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:24,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 75 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 23:57:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2021-12-21 23:57:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-21 23:57:24,999 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2021-12-21 23:57:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:24,999 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-21 23:57:24,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-21 23:57:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:25,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:25,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,201 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-21 23:57:25,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:25,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990918391] [2021-12-21 23:57:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:25,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:25,203 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) [2021-12-21 23:57:25,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 23:57:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:57:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:25,277 INFO L387 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 [2021-12-21 23:57:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990918391] [2021-12-21 23:57:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990918391] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:26,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 23:57:26,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-21 23:57:26,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397965011] [2021-12-21 23:57:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:26,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:26,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:26,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:26,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 23:57:26,938 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:27,147 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-21 23:57:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-21 23:57:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:27,148 INFO L225 Difference]: With dead ends: 53 [2021-12-21 23:57:27,149 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 23:57:27,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:27,149 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 30 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 23:57:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-21 23:57:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 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) [2021-12-21 23:57:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-21 23:57:27,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 12 [2021-12-21 23:57:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:27,153 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-21 23:57:27,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-21 23:57:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 23:57:27,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:27,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:27,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:27,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,354 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-12-21 23:57:27,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971535250] [2021-12-21 23:57:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:27,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:27,358 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) [2021-12-21 23:57:27,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 23:57:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 23:57:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:27,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:27,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971535250] [2021-12-21 23:57:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971535250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:27,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:27,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809572250] [2021-12-21 23:57:27,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:27,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:27,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:27,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:27,452 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-12-21 23:57:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:27,533 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-12-21 23:57:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 [2021-12-21 23:57:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:27,535 INFO L225 Difference]: With dead ends: 64 [2021-12-21 23:57:27,535 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 23:57:27,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:27,536 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:27,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 23:57:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2021-12-21 23:57:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-21 23:57:27,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2021-12-21 23:57:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:27,540 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-21 23:57:27,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-12-21 23:57:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-21 23:57:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 23:57:27,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:27,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:27,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:27,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1346062156, now seen corresponding path program 1 times [2021-12-21 23:57:27,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282679394] [2021-12-21 23:57:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:27,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:27,753 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) [2021-12-21 23:57:27,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 23:57:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:27,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:27,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:28,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282679394] [2021-12-21 23:57:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282679394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:28,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 23:57:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206363836] [2021-12-21 23:57:28,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 23:57:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 23:57:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:28,036 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:28,302 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-12-21 23:57:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 23:57:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-12-21 23:57:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:28,304 INFO L225 Difference]: With dead ends: 66 [2021-12-21 23:57:28,304 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 23:57:28,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 23:57:28,305 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:28,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 72 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 23:57:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-12-21 23:57:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 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) [2021-12-21 23:57:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-21 23:57:28,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-12-21 23:57:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:28,308 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-21 23:57:28,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-21 23:57:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:57:28,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:28,309 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:28,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:28,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-12-21 23:57:28,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203953902] [2021-12-21 23:57:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:28,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:28,519 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) [2021-12-21 23:57:28,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 23:57:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:28,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203953902] [2021-12-21 23:57:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203953902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:28,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:28,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307365087] [2021-12-21 23:57:28,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:28,699 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:28,805 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-12-21 23:57:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-12-21 23:57:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:28,806 INFO L225 Difference]: With dead ends: 55 [2021-12-21 23:57:28,806 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 23:57:28,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:28,807 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:28,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 23:57:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-12-21 23:57:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 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) [2021-12-21 23:57:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-21 23:57:28,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-12-21 23:57:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:28,810 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-21 23:57:28,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-21 23:57:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:57:28,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:28,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:28,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:29,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:29,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-12-21 23:57:29,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:29,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7923149] [2021-12-21 23:57:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:29,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:29,020 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) [2021-12-21 23:57:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 23:57:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:57:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:29,096 INFO L387 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 [2021-12-21 23:57:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:29,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:29,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7923149] [2021-12-21 23:57:29,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7923149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:29,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-21 23:57:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951898914] [2021-12-21 23:57:29,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:57:29,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:57:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 23:57:29,919 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:30,574 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-21 23:57:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 23:57:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2021-12-21 23:57:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:30,577 INFO L225 Difference]: With dead ends: 76 [2021-12-21 23:57:30,577 INFO L226 Difference]: Without dead ends: 76 [2021-12-21 23:57:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:30,578 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:30,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 88 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2021-12-21 23:57:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-21 23:57:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-12-21 23:57:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-21 23:57:30,581 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-12-21 23:57:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-21 23:57:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-21 23:57:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:30,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:30,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:30,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:30,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:30,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-12-21 23:57:30,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:30,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476427699] [2021-12-21 23:57:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:30,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:30,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:30,785 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) [2021-12-21 23:57:30,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 23:57:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:57:30,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:30,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:30,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476427699] [2021-12-21 23:57:30,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476427699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:30,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:30,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:30,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049814827] [2021-12-21 23:57:30,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:30,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:30,961 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2021-12-21 23:57:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:30,964 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-12-21 23:57:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 18 [2021-12-21 23:57:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:30,967 INFO L225 Difference]: With dead ends: 92 [2021-12-21 23:57:30,967 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 23:57:30,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:30,968 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:30,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 64 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 23:57:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 23:57:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-12-21 23:57:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-12-21 23:57:30,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 18 [2021-12-21 23:57:30,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:30,976 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-12-21 23:57:30,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2021-12-21 23:57:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-12-21 23:57:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:30,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:30,977 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-21 23:57:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:31,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-21 23:57:31,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:31,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526822936] [2021-12-21 23:57:31,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:31,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:31,189 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) [2021-12-21 23:57:31,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 23:57:31,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:31,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:31,263 INFO L387 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 [2021-12-21 23:57:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:31,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:32,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:32,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526822936] [2021-12-21 23:57:32,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526822936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:32,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:32,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 23:57:32,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944358348] [2021-12-21 23:57:32,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:32,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 23:57:32,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 23:57:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:57:32,309 INFO L87 Difference]: Start difference. First operand 82 states and 96 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) [2021-12-21 23:57:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:33,745 INFO L93 Difference]: Finished difference Result 323 states and 386 transitions. [2021-12-21 23:57:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 23:57:33,746 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 [2021-12-21 23:57:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:33,748 INFO L225 Difference]: With dead ends: 323 [2021-12-21 23:57:33,748 INFO L226 Difference]: Without dead ends: 323 [2021-12-21 23:57:33,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:57:33,749 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 454 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:33,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 252 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 194 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2021-12-21 23:57:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-21 23:57:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 98. [2021-12-21 23:57:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 97 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) [2021-12-21 23:57:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-12-21 23:57:33,755 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 18 [2021-12-21 23:57:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:33,755 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-12-21 23:57:33,755 INFO L471 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) [2021-12-21 23:57:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-12-21 23:57:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 23:57:33,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:33,756 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:33,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-21 23:57:33,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:33,965 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash 997947932, now seen corresponding path program 1 times [2021-12-21 23:57:33,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891535632] [2021-12-21 23:57:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:33,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:33,967 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) [2021-12-21 23:57:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 23:57:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:57:34,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:34,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891535632] [2021-12-21 23:57:34,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891535632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:34,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:34,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:34,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729254821] [2021-12-21 23:57:34,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:34,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:34,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:34,187 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:34,191 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-12-21 23:57:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-12-21 23:57:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:34,192 INFO L225 Difference]: With dead ends: 97 [2021-12-21 23:57:34,192 INFO L226 Difference]: Without dead ends: 76 [2021-12-21 23:57:34,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:34,193 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:34,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-21 23:57:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-21 23:57:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-12-21 23:57:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-12-21 23:57:34,196 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2021-12-21 23:57:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:34,196 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-12-21 23:57:34,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-12-21 23:57:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 23:57:34,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:34,197 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:34,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:34,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,406 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash 861855476, now seen corresponding path program 2 times [2021-12-21 23:57:34,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587157143] [2021-12-21 23:57:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:34,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:34,408 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) [2021-12-21 23:57:34,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 23:57:34,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:34,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:34,494 INFO L387 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 [2021-12-21 23:57:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:57:34,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:36,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587157143] [2021-12-21 23:57:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587157143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:36,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-21 23:57:36,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586428308] [2021-12-21 23:57:36,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:36,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:36,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:36,003 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:36,596 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-21 23:57:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-12-21 23:57:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:36,598 INFO L225 Difference]: With dead ends: 74 [2021-12-21 23:57:36,598 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 23:57:36,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:57:36,599 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2021-12-21 23:57:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 23:57:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-12-21 23:57:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-21 23:57:36,601 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 24 [2021-12-21 23:57:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:36,602 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-21 23:57:36,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-21 23:57:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:57:36,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:36,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:36,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1755727223, now seen corresponding path program 3 times [2021-12-21 23:57:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109116467] [2021-12-21 23:57:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:36,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:36,805 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) [2021-12-21 23:57:36,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 23:57:36,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:57:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 23:57:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:36,924 INFO L387 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 [2021-12-21 23:57:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:39,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109116467] [2021-12-21 23:57:39,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109116467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:39,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:39,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-12-21 23:57:39,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291698958] [2021-12-21 23:57:39,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:39,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 23:57:39,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 23:57:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:57:39,065 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-12-21 23:57:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:43,495 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-12-21 23:57:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 23:57:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:57:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:43,496 INFO L225 Difference]: With dead ends: 132 [2021-12-21 23:57:43,496 INFO L226 Difference]: Without dead ends: 114 [2021-12-21 23:57:43,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 23:57:43,498 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 398 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:43,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 159 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 23:57:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-21 23:57:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-12-21 23:57:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-12-21 23:57:43,501 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 28 [2021-12-21 23:57:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:43,501 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-12-21 23:57:43,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-12-21 23:57:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-12-21 23:57:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:57:43,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:43,502 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-21 23:57:43,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:43,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:43,711 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:57:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-21 23:57:43,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:43,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635801403] [2021-12-21 23:57:43,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:43,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:43,713 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) [2021-12-21 23:57:43,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 23:57:43,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:57:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:43,885 INFO L387 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 [2021-12-21 23:57:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:44,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:47,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635801403] [2021-12-21 23:57:47,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635801403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:47,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:47,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 23:57:47,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912311353] [2021-12-21 23:57:47,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:47,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:57:47,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:57:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:57:47,346 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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) [2021-12-21 23:57:56,686 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 [] [2021-12-21 23:58:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:06,353 INFO L93 Difference]: Finished difference Result 537 states and 603 transitions. [2021-12-21 23:58:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 23:58:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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 [2021-12-21 23:58:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:06,356 INFO L225 Difference]: With dead ends: 537 [2021-12-21 23:58:06,356 INFO L226 Difference]: Without dead ends: 537 [2021-12-21 23:58:06,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=739, Invalid=1613, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 23:58:06,357 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 807 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:06,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 467 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 536 Invalid, 1 Unknown, 66 Unchecked, 5.1s Time] [2021-12-21 23:58:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-12-21 23:58:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 107. [2021-12-21 23:58:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 106 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-12-21 23:58:06,367 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 34 [2021-12-21 23:58:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:06,367 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-12-21 23:58:06,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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) [2021-12-21 23:58:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-12-21 23:58:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:58:06,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:06,368 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:06,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:06,571 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:58:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash 195132954, now seen corresponding path program 1 times [2021-12-21 23:58:06,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:06,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741550084] [2021-12-21 23:58:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:06,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:06,574 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) [2021-12-21 23:58:06,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 23:58:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 23:58:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:06,672 INFO L387 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 [2021-12-21 23:58:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:58:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:58:09,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741550084] [2021-12-21 23:58:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741550084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:09,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:09,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-21 23:58:09,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252618345] [2021-12-21 23:58:09,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:09,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 23:58:09,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 23:58:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:58:09,022 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2021-12-21 23:58:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:09,933 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-12-21 23:58:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 23:58:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 34 [2021-12-21 23:58:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:09,935 INFO L225 Difference]: With dead ends: 142 [2021-12-21 23:58:09,936 INFO L226 Difference]: Without dead ends: 129 [2021-12-21 23:58:09,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:58:09,936 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:09,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2021-12-21 23:58:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-21 23:58:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2021-12-21 23:58:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 122 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) [2021-12-21 23:58:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-12-21 23:58:09,939 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 34 [2021-12-21 23:58:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:09,940 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-12-21 23:58:09,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2021-12-21 23:58:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-12-21 23:58:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 23:58:09,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:09,941 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:09,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:10,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:10,146 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:58:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1584580368, now seen corresponding path program 4 times [2021-12-21 23:58:10,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:10,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988031869] [2021-12-21 23:58:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:58:10,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:10,149 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) [2021-12-21 23:58:10,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 23:58:10,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:58:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 23:58:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:10,261 INFO L387 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 [2021-12-21 23:58:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:58:10,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:58:12,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988031869] [2021-12-21 23:58:12,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988031869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:12,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:12,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-21 23:58:12,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929979073] [2021-12-21 23:58:12,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 23:58:12,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 23:58:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:58:12,622 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 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) [2021-12-21 23:58:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:17,605 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2021-12-21 23:58:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 23:58:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-21 23:58:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:17,607 INFO L225 Difference]: With dead ends: 174 [2021-12-21 23:58:17,607 INFO L226 Difference]: Without dead ends: 174 [2021-12-21 23:58:17,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 23:58:17,608 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 386 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:17,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 174 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 214 Invalid, 0 Unknown, 40 Unchecked, 2.3s Time] [2021-12-21 23:58:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-21 23:58:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 143. [2021-12-21 23:58:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 142 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) [2021-12-21 23:58:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2021-12-21 23:58:17,610 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 40 [2021-12-21 23:58:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:17,610 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2021-12-21 23:58:17,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 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) [2021-12-21 23:58:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2021-12-21 23:58:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 23:58:17,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:17,611 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:17,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:17,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:17,811 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 23:58:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1667679380, now seen corresponding path program 5 times [2021-12-21 23:58:17,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:17,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571525366] [2021-12-21 23:58:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:58:17,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:17,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:17,813 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) [2021-12-21 23:58:17,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 23:58:17,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-21 23:58:17,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 23:58:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:17,993 INFO L387 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 [2021-12-21 23:58:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:58:18,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:23,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:23,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571525366] [2021-12-21 23:58:23,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571525366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:23,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:23,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-12-21 23:58:23,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520255018] [2021-12-21 23:58:23,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:23,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 23:58:23,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 23:58:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 23:58:23,963 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)