./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/list-ext-properties/test-0019_1-2.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 ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:54:20,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:54:20,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:54:20,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:54:20,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:54:20,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:54:20,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:54:20,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:54:20,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:54:20,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:54:20,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:54:20,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:54:20,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:54:20,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:54:20,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:54:20,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:54:20,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:54:20,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:54:20,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:54:20,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:54:20,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:54:20,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:54:20,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:54:20,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:54:20,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:54:20,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:54:20,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:54:20,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:54:20,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:54:20,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:54:20,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:54:20,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:54:20,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:54:20,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:54:20,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:54:20,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:54:20,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:54:20,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:54:20,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:54:20,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:54:20,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:54:20,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:54:20,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:54:20,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:54:20,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:54:20,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:54:20,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:54:20,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:54:20,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:54:20,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:54:20,341 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:54:20,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:54:20,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:54:20,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:54:20,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:54:20,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:54:20,344 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:54:20,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:54:20,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:54:20,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:54:20,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:54:20,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:54:20,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:20,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:54:20,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:54:20,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:54:20,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:54:20,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:54:20,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2021-12-16 05:54:20,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:54:20,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:54:20,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:54:20,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:54:20,597 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:54:20,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-16 05:54:20,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bc14722/21881e403f64406fbcd4f5d5a6ef1e27/FLAGbb583465c [2021-12-16 05:54:21,063 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:54:21,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-16 05:54:21,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bc14722/21881e403f64406fbcd4f5d5a6ef1e27/FLAGbb583465c [2021-12-16 05:54:21,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24bc14722/21881e403f64406fbcd4f5d5a6ef1e27 [2021-12-16 05:54:21,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:54:21,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:54:21,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:21,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:54:21,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:54:21,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:21" (1/1) ... [2021-12-16 05:54:21,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@257db8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:21, skipping insertion in model container [2021-12-16 05:54:21,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:21" (1/1) ... [2021-12-16 05:54:21,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:54:21,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:54:21,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:21,424 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) [2021-12-16 05:54:21,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6306cad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:21, skipping insertion in model container [2021-12-16 05:54:21,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:21,427 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 05:54:21,429 INFO L158 Benchmark]: Toolchain (without parser) took 324.03ms. Allocated memory is still 117.4MB. Free memory was 83.8MB in the beginning and 90.6MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 05:54:21,430 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:54:21,431 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.99ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 90.6MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 05:54:21,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 39.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.99ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 90.6MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. 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/list-ext-properties/test-0019_1-2.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 ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:54:23,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:54:23,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:54:23,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:54:23,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:54:23,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:54:23,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:54:23,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:54:23,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:54:23,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:54:23,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:54:23,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:54:23,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:54:23,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:54:23,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:54:23,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:54:23,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:54:23,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:54:23,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:54:23,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:54:23,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:54:23,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:54:23,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:54:23,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:54:23,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:54:23,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:54:23,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:54:23,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:54:23,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:54:23,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:54:23,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:54:23,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:54:23,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:54:23,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:54:23,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:54:23,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:54:23,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:54:23,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:54:23,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:54:23,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:54:23,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:54:23,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 05:54:23,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:54:23,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:54:23,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:54:23,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:54:23,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:54:23,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:54:23,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:54:23,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:54:23,298 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:54:23,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:54:23,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:54:23,299 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:54:23,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:54:23,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:54:23,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:54:23,300 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 05:54:23,301 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 05:54:23,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:54:23,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:54:23,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:54:23,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:54:23,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:54:23,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:23,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:54:23,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:54:23,302 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 05:54:23,303 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 05:54:23,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:54:23,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 05:54:23,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef47df31d033e531a0040913ad039c21826bf787c77c5128ceae3ef436a47b49 [2021-12-16 05:54:23,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:54:23,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:54:23,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:54:23,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:54:23,599 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:54:23,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-16 05:54:23,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c0914/3a4f572715254caf828cfc8cc8d01d7c/FLAGcf0fe3c95 [2021-12-16 05:54:24,103 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:54:24,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0019_1-2.i [2021-12-16 05:54:24,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c0914/3a4f572715254caf828cfc8cc8d01d7c/FLAGcf0fe3c95 [2021-12-16 05:54:24,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c0914/3a4f572715254caf828cfc8cc8d01d7c [2021-12-16 05:54:24,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:54:24,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:54:24,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:24,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:54:24,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:54:24,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:24,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486204dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24, skipping insertion in model container [2021-12-16 05:54:24,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:24,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:54:24,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:54:24,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:24,857 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 05:54:24,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:54:24,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:24,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:54:24,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:24,972 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:54:24,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24 WrapperNode [2021-12-16 05:54:24,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:24,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:24,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:54:24,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:54:24,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,041 INFO L137 Inliner]: procedures = 128, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-12-16 05:54:25,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:25,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:54:25,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:54:25,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:54:25,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:54:25,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:54:25,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:54:25,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:54:25,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (1/1) ... [2021-12-16 05:54:25,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:25,140 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) [2021-12-16 05:54:25,167 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 [2021-12-16 05:54:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 05:54:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:54:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:54:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:54:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:54:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:54:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:54:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 05:54:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 05:54:25,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:54:25,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:54:25,321 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:54:25,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:54:25,637 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:54:25,643 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:54:25,643 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 05:54:25,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:25 BoogieIcfgContainer [2021-12-16 05:54:25,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:54:25,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:54:25,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:54:25,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:54:25,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:54:24" (1/3) ... [2021-12-16 05:54:25,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3878f61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:25, skipping insertion in model container [2021-12-16 05:54:25,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:24" (2/3) ... [2021-12-16 05:54:25,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3878f61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:25, skipping insertion in model container [2021-12-16 05:54:25,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:25" (3/3) ... [2021-12-16 05:54:25,651 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019_1-2.i [2021-12-16 05:54:25,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:54:25,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-12-16 05:54:25,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:54:25,696 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 [2021-12-16 05:54:25,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-12-16 05:54:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:54:25,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:25,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:54:25,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-16 05:54:25,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:25,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985570311] [2021-12-16 05:54:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:25,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:25,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:25,739 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) [2021-12-16 05:54:25,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 05:54:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:54:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:25,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:54:25,984 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:54:25,985 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-16 05:54:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:26,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:26,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985570311] [2021-12-16 05:54:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985570311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:26,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:26,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165006897] [2021-12-16 05:54:26,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:26,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:26,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:26,045 INFO L87 Difference]: Start difference. First operand has 70 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:26,182 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-12-16 05:54:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-16 05:54:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:26,197 INFO L225 Difference]: With dead ends: 66 [2021-12-16 05:54:26,197 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 05:54:26,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:26,202 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:26,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 05:54:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-16 05:54:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 63 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) [2021-12-16 05:54:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-12-16 05:54:26,236 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 3 [2021-12-16 05:54:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-12-16 05:54:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-12-16 05:54:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:54:26,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:26,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:54:26,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:26,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-16 05:54:26,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938074763] [2021-12-16 05:54:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:26,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:26,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:26,450 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) [2021-12-16 05:54:26,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 05:54:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:54:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:26,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:54:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:26,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:26,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938074763] [2021-12-16 05:54:26,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938074763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:26,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:26,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:26,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91779864] [2021-12-16 05:54:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:26,587 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:26,698 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-12-16 05:54:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-16 05:54:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:26,700 INFO L225 Difference]: With dead ends: 63 [2021-12-16 05:54:26,700 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 05:54:26,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:26,701 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:26,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 05:54:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-16 05:54:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-12-16 05:54:26,711 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 3 [2021-12-16 05:54:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:26,711 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-12-16 05:54:26,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-12-16 05:54:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 05:54:26,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:26,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 05:54:26,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:26,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-12-16 05:54:26,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048409926] [2021-12-16 05:54:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:26,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:26,921 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) [2021-12-16 05:54:26,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 05:54:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:54:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:54:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:54:27,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:54:27,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-16 05:54:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:27,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:27,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048409926] [2021-12-16 05:54:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048409926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:27,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:27,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:27,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153031933] [2021-12-16 05:54:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:27,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:27,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:27,094 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:27,222 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-12-16 05:54:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-16 05:54:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:27,223 INFO L225 Difference]: With dead ends: 60 [2021-12-16 05:54:27,223 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 05:54:27,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:27,225 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:27,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 05:54:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-16 05:54:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 59 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-12-16 05:54:27,230 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 5 [2021-12-16 05:54:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:27,230 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-12-16 05:54:27,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-12-16 05:54:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:54:27,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:27,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:27,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:27,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:27,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash 59199982, now seen corresponding path program 1 times [2021-12-16 05:54:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513433001] [2021-12-16 05:54:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:27,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:27,443 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) [2021-12-16 05:54:27,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 05:54:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:54:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:27,560 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 05:54:27,560 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-16 05:54:27,580 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:54:27,581 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:54:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 05:54:27,681 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:54:27,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-16 05:54:27,727 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:54:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 05:54:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:27,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 05:54:27,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:54:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 05:54:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:27,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:27,785 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513433001] [2021-12-16 05:54:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513433001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:27,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:54:27,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263384890] [2021-12-16 05:54:27,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:54:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:54:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:54:27,788 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2021-12-16 05:54:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:28,113 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-12-16 05:54:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:54:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2021-12-16 05:54:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:28,114 INFO L225 Difference]: With dead ends: 59 [2021-12-16 05:54:28,114 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 05:54:28,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:28,115 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:28,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 142 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:54:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 05:54:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-16 05:54:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 58 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-16 05:54:28,119 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 8 [2021-12-16 05:54:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:28,120 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-16 05:54:28,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2021-12-16 05:54:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-16 05:54:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:54:28,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:28,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:28,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:28,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:28,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 59199981, now seen corresponding path program 1 times [2021-12-16 05:54:28,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347960775] [2021-12-16 05:54:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:28,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:28,331 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) [2021-12-16 05:54:28,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 05:54:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:54:28,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:28,415 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 05:54:28,415 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-16 05:54:28,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:28,476 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:54:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:54:28,502 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:54:28,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 05:54:28,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-16 05:54:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:28,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:28,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347960775] [2021-12-16 05:54:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347960775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:28,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:54:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925728615] [2021-12-16 05:54:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:28,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:54:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:54:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:28,522 INFO L87 Difference]: Start difference. First operand 59 states and 59 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) [2021-12-16 05:54:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:28,762 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-12-16 05:54:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:54:28,763 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 [2021-12-16 05:54:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:28,764 INFO L225 Difference]: With dead ends: 58 [2021-12-16 05:54:28,764 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 05:54:28,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:54:28,765 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:28,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:54:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 05:54:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-16 05:54:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 57 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-12-16 05:54:28,770 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 8 [2021-12-16 05:54:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:28,771 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-12-16 05:54:28,771 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) [2021-12-16 05:54:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-12-16 05:54:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:54:28,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:28,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:28,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:28,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:28,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937559, now seen corresponding path program 1 times [2021-12-16 05:54:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733815722] [2021-12-16 05:54:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:28,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:28,982 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) [2021-12-16 05:54:28,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 05:54:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:54:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:29,127 INFO L388 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 [2021-12-16 05:54:29,157 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:54:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:54:29,236 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:29,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-16 05:54:29,260 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:54:29,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-12-16 05:54:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:29,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:29,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733815722] [2021-12-16 05:54:29,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733815722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:29,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:29,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:54:29,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937690285] [2021-12-16 05:54:29,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:29,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:54:29,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:54:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:29,274 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:29,478 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-12-16 05:54:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:54:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:54:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:29,479 INFO L225 Difference]: With dead ends: 57 [2021-12-16 05:54:29,479 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 05:54:29,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:54:29,480 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:29,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 162 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:54:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 05:54:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-16 05:54:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 56 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) [2021-12-16 05:54:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-12-16 05:54:29,484 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 11 [2021-12-16 05:54:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:29,484 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-12-16 05:54:29,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-12-16 05:54:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:54:29,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:29,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:29,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:29,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:29,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937558, now seen corresponding path program 1 times [2021-12-16 05:54:29,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:29,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426413946] [2021-12-16 05:54:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:29,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:29,690 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) [2021-12-16 05:54:29,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 05:54:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:29,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 05:54:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:29,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:29,868 INFO L388 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 [2021-12-16 05:54:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:29,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:54:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 05:54:30,024 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:30,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-16 05:54:30,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:54:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:54:30,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:54:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 05:54:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:30,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:30,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:30,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426413946] [2021-12-16 05:54:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426413946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:30,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:30,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:54:30,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852110217] [2021-12-16 05:54:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:30,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:54:30,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:54:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:30,107 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:30,325 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-12-16 05:54:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:54:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:54:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:30,326 INFO L225 Difference]: With dead ends: 56 [2021-12-16 05:54:30,326 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 05:54:30,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:54:30,327 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:30,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:54:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 05:54:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-16 05:54:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.696969696969697) internal successors, (56), 55 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) [2021-12-16 05:54:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-12-16 05:54:30,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 11 [2021-12-16 05:54:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:30,332 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-12-16 05:54:30,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-12-16 05:54:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 05:54:30,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:30,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:30,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:30,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:30,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886990, now seen corresponding path program 1 times [2021-12-16 05:54:30,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759588492] [2021-12-16 05:54:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:30,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:30,550 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) [2021-12-16 05:54:30,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 05:54:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:54:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:30,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:30,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759588492] [2021-12-16 05:54:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759588492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:30,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:30,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:30,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019915189] [2021-12-16 05:54:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:30,681 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) 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) [2021-12-16 05:54:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:30,768 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-12-16 05:54:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:30,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 [2021-12-16 05:54:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:30,769 INFO L225 Difference]: With dead ends: 54 [2021-12-16 05:54:30,769 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 05:54:30,769 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 [2021-12-16 05:54:30,769 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:30,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 05:54:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-16 05:54:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 53 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) [2021-12-16 05:54:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-12-16 05:54:30,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 14 [2021-12-16 05:54:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-12-16 05:54:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) 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) [2021-12-16 05:54:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-12-16 05:54:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 05:54:30,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:30,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:30,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:30,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:30,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886989, now seen corresponding path program 1 times [2021-12-16 05:54:30,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175544799] [2021-12-16 05:54:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:30,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:30,982 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) [2021-12-16 05:54:30,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 05:54:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:54:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:31,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:31,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:31,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175544799] [2021-12-16 05:54:31,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175544799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:31,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:31,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:31,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970606168] [2021-12-16 05:54:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:31,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:31,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:31,190 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) 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) [2021-12-16 05:54:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:31,274 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-12-16 05:54:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 [2021-12-16 05:54:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:31,275 INFO L225 Difference]: With dead ends: 52 [2021-12-16 05:54:31,275 INFO L226 Difference]: Without dead ends: 52 [2021-12-16 05:54:31,275 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 [2021-12-16 05:54:31,276 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:31,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-16 05:54:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-16 05:54:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-12-16 05:54:31,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 14 [2021-12-16 05:54:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-12-16 05:54:31,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) 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) [2021-12-16 05:54:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-12-16 05:54:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:54:31,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:31,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:31,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:31,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:31,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash 478865263, now seen corresponding path program 1 times [2021-12-16 05:54:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:31,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725789336] [2021-12-16 05:54:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:31,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:31,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:31,490 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) [2021-12-16 05:54:31,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 05:54:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:31,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:54:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:31,624 INFO L388 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 [2021-12-16 05:54:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:31,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:31,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:31,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725789336] [2021-12-16 05:54:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725789336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:31,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:31,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:31,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235335441] [2021-12-16 05:54:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:31,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:31,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:31,632 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2021-12-16 05:54:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:31,720 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-12-16 05:54:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17 [2021-12-16 05:54:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:31,720 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:54:31,720 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:54:31,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:31,721 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:31,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:54:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-16 05:54:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-12-16 05:54:31,724 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 17 [2021-12-16 05:54:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-12-16 05:54:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2021-12-16 05:54:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-12-16 05:54:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:54:31,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:31,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:31,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:31,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:31,926 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 478865264, now seen corresponding path program 1 times [2021-12-16 05:54:31,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:31,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683780817] [2021-12-16 05:54:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:31,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:31,928 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) [2021-12-16 05:54:31,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 05:54:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:54:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:32,061 INFO L388 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 [2021-12-16 05:54:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:32,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:32,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:32,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683780817] [2021-12-16 05:54:32,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683780817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:32,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:32,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:54:32,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005833943] [2021-12-16 05:54:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:32,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:54:32,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:54:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:32,072 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2021-12-16 05:54:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:32,124 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-16 05:54:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:54:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17 [2021-12-16 05:54:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:32,125 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:54:32,125 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:54:32,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:54:32,126 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:32,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:54:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:54:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-16 05:54:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 43 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-12-16 05:54:32,134 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 17 [2021-12-16 05:54:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:32,134 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-12-16 05:54:32,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2021-12-16 05:54:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-12-16 05:54:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 05:54:32,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:32,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:32,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:32,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:32,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -925217004, now seen corresponding path program 1 times [2021-12-16 05:54:32,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:32,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922418104] [2021-12-16 05:54:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:32,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:32,342 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) [2021-12-16 05:54:32,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 05:54:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 05:54:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:32,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:32,615 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:54:32,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 05:54:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:32,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:54:32,773 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:32,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-16 05:54:32,898 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-16 05:54:33,091 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-16 05:54:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 52 [2021-12-16 05:54:33,182 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:54:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-12-16 05:54:33,304 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-12-16 05:54:33,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 56 [2021-12-16 05:54:33,400 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:54:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 27 [2021-12-16 05:54:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:33,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:33,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:33,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922418104] [2021-12-16 05:54:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922418104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:33,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:33,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 05:54:33,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804826845] [2021-12-16 05:54:33,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:33,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:54:33,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:54:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:54:33,512 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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) [2021-12-16 05:54:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:33,856 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-12-16 05:54:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:54:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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 23 [2021-12-16 05:54:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:33,857 INFO L225 Difference]: With dead ends: 43 [2021-12-16 05:54:33,857 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 05:54:33,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:54:33,858 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:33,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-12-16 05:54:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 05:54:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 05:54:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.303030303030303) internal successors, (43), 42 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) [2021-12-16 05:54:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-12-16 05:54:33,864 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 23 [2021-12-16 05:54:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:33,864 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-12-16 05:54:33,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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) [2021-12-16 05:54:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-12-16 05:54:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 05:54:33,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:33,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:33,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:34,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:34,066 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash -925217003, now seen corresponding path program 1 times [2021-12-16 05:54:34,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056846733] [2021-12-16 05:54:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:34,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:34,068 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) [2021-12-16 05:54:34,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 05:54:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 05:54:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:34,346 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:54:34,346 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:54:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:54:34,365 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:54:34,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 05:54:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:34,472 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:54:34,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:54:34,503 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-16 05:54:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-12-16 05:54:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:34,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-12-16 05:54:34,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:54:34,747 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:34,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 77 [2021-12-16 05:54:34,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-16 05:54:34,992 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 81 [2021-12-16 05:54:35,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-16 05:54:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:37,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-16 05:54:37,460 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:54:37,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-16 05:54:37,665 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 05:54:37,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-12-16 05:54:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:38,272 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-12-16 05:54:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2021-12-16 05:54:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:40,060 INFO L354 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2021-12-16 05:54:40,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 86 [2021-12-16 05:54:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:40,122 INFO L354 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-12-16 05:54:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 47 [2021-12-16 05:54:40,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 05:54:40,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-12-16 05:54:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:41,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:54:41,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:54:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056846733] [2021-12-16 05:54:41,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056846733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:41,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:41,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 05:54:41,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553593235] [2021-12-16 05:54:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:41,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:54:41,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:54:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:54:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=206, Unknown=1, NotChecked=0, Total=240 [2021-12-16 05:54:41,031 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2021-12-16 05:54:43,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:54:45,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:54:47,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:54:51,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:54:53,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:54:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:58,135 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-12-16 05:54:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:54:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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 23 [2021-12-16 05:54:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:58,136 INFO L225 Difference]: With dead ends: 41 [2021-12-16 05:54:58,136 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 05:54:58,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=100, Invalid=599, Unknown=3, NotChecked=0, Total=702 [2021-12-16 05:54:58,137 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:58,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 136 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 222 Invalid, 5 Unknown, 64 Unchecked, 10.5s Time] [2021-12-16 05:54:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 05:54:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 05:54:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 40 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) [2021-12-16 05:54:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-12-16 05:54:58,140 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 23 [2021-12-16 05:54:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-12-16 05:54:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2021-12-16 05:54:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-12-16 05:54:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 05:54:58,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:58,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:58,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:54:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:54:58,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:54:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043969, now seen corresponding path program 1 times [2021-12-16 05:54:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:54:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007794445] [2021-12-16 05:54:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:58,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:54:58,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:54:58,349 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) [2021-12-16 05:54:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 05:54:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 05:54:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:54:58,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:54:58,742 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:54:58,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 05:54:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:54:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:54:58,931 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:58,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-12-16 05:54:59,047 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:54:59,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-12-16 05:55:03,130 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:55:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-16 05:55:03,191 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-16 05:55:03,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-12-16 05:55:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 05:55:03,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2021-12-16 05:55:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:03,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:03,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:55:03,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007794445] [2021-12-16 05:55:03,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007794445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:03,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:03,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-16 05:55:03,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63566181] [2021-12-16 05:55:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:03,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:55:03,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:55:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:55:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=150, Unknown=2, NotChecked=0, Total=182 [2021-12-16 05:55:03,450 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:04,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:55:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:11,245 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-12-16 05:55:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:55:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-12-16 05:55:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:11,246 INFO L225 Difference]: With dead ends: 40 [2021-12-16 05:55:11,246 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 05:55:11,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=74, Invalid=344, Unknown=2, NotChecked=0, Total=420 [2021-12-16 05:55:11,247 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:11,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 103 Unchecked, 2.7s Time] [2021-12-16 05:55:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 05:55:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-16 05:55:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-12-16 05:55:11,249 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 24 [2021-12-16 05:55:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-12-16 05:55:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-12-16 05:55:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 05:55:11,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:11,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:11,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:11,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:55:11,450 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:55:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1383043970, now seen corresponding path program 1 times [2021-12-16 05:55:11,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:55:11,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498829081] [2021-12-16 05:55:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:11,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:55:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:55:11,453 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) [2021-12-16 05:55:11,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 05:55:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 05:55:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 05:55:11,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:55:11,793 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 05:55:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 05:55:11,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:11,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 05:55:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:55:12,040 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:55:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-12-16 05:55:12,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:55:12,181 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:55:12,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 63 [2021-12-16 05:55:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-16 05:55:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-12-16 05:55:12,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:55:12,370 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-16 05:55:12,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-12-16 05:55:12,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:55:12,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 05:55:12,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 05:55:12,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-16 05:55:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 05:55:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:12,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:55:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498829081] [2021-12-16 05:55:12,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498829081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:12,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:12,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-16 05:55:12,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093290376] [2021-12-16 05:55:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:55:12,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:55:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:55:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:55:12,542 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:13,181 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-12-16 05:55:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:55:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-12-16 05:55:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:13,182 INFO L225 Difference]: With dead ends: 38 [2021-12-16 05:55:13,182 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 05:55:13,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:55:13,183 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:13,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 86 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 177 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-12-16 05:55:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 05:55:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-16 05:55:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-12-16 05:55:13,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 24 [2021-12-16 05:55:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-12-16 05:55:13,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-12-16 05:55:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:55:13,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:13,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:13,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:13,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:55:13,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-12-16 05:55:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash 641636282, now seen corresponding path program 1 times [2021-12-16 05:55:13,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:55:13,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699997992] [2021-12-16 05:55:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:13,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:55:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:55:13,393 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) [2021-12-16 05:55:13,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 05:55:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:13,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-16 05:55:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:13,658 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:55:13,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 05:55:13,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:55:13,773 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-16 05:55:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 52 [2021-12-16 05:55:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:13,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2021-12-16 05:55:14,033 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:55:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 130 [2021-12-16 05:55:14,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:55:14,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:55:14,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 71 [2021-12-16 05:55:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2021-12-16 05:55:14,461 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 05:55:14,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 195 [2021-12-16 05:55:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:14,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 167 [2021-12-16 05:55:14,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 117 [2021-12-16 05:55:15,511 INFO L354 Elim1Store]: treesize reduction 12, result has 65.7 percent of original size [2021-12-16 05:55:15,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 43 [2021-12-16 05:55:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 131 [2021-12-16 05:55:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 98 [2021-12-16 05:55:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 111 [2021-12-16 05:55:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:16,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 120 [2021-12-16 05:55:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 140 [2021-12-16 05:55:16,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 98 [2021-12-16 05:55:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 117 [2021-12-16 05:55:17,303 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-16 05:55:17,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 69 [2021-12-16 05:55:17,783 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-12-16 05:55:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 119 treesize of output 43 [2021-12-16 05:55:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:17,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:17,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:55:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699997992] [2021-12-16 05:55:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699997992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:17,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:17,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-16 05:55:17,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032816995] [2021-12-16 05:55:17,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:55:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:55:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:55:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:55:17,867 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:20,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:55:23,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:55:25,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []