./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:01:42,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:01:42,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:01:42,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:01:42,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:01:42,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:01:42,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:01:42,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:01:42,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:01:42,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:01:42,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:01:42,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:01:42,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:01:42,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:01:42,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:01:42,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:01:42,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:01:42,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:01:42,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:01:42,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:01:42,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:01:42,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:01:42,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:01:42,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:01:42,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:01:42,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:01:42,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:01:42,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:01:42,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:01:42,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:01:42,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:01:42,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:01:42,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:01:42,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:01:42,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:01:42,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:01:42,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:01:42,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:01:42,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:01:42,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:01:42,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:01:42,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:01:42,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:01:42,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:01:42,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:01:42,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:01:42,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:01:42,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:01:42,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:01:42,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:01:42,467 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:01:42,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:01:42,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:01:42,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:01:42,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:01:42,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:01:42,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:01:42,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:01:42,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:01:42,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:01:42,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:01:42,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:42,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:01:42,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:01:42,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:01:42,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:01:42,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:01:42,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-12-21 18:01:42,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:01:42,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:01:42,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:01:42,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:01:42,695 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:01:42,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-21 18:01:42,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f0275aea/fc3e94d7c78942da8950c5c62385f39e/FLAG24fe8c771 [2021-12-21 18:01:43,219 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:01:43,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-21 18:01:43,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f0275aea/fc3e94d7c78942da8950c5c62385f39e/FLAG24fe8c771 [2021-12-21 18:01:43,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f0275aea/fc3e94d7c78942da8950c5c62385f39e [2021-12-21 18:01:43,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:01:43,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:01:43,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:43,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:01:43,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:01:43,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:43" (1/1) ... [2021-12-21 18:01:43,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6d33cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:43, skipping insertion in model container [2021-12-21 18:01:43,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:43" (1/1) ... [2021-12-21 18:01:43,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:01:43,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:43,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:43,964 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 18:01:43,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2596bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:43, skipping insertion in model container [2021-12-21 18:01:43,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:43,966 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:01:43,968 INFO L158 Benchmark]: Toolchain (without parser) took 247.60ms. Allocated memory is still 98.6MB. Free memory was 62.4MB in the beginning and 73.7MB in the end (delta: -11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 18:01:43,969 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 68.8MB in the end (delta: 24.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:01:43,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.97ms. Allocated memory is still 98.6MB. Free memory was 62.1MB in the beginning and 73.7MB in the end (delta: -11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 18:01:43,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 68.8MB in the end (delta: 24.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.97ms. Allocated memory is still 98.6MB. Free memory was 62.1MB in the beginning and 73.7MB in the end (delta: -11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 532]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:01:45,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:01:45,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:01:45,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:01:45,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:01:45,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:01:45,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:01:45,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:01:45,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:01:45,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:01:45,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:01:45,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:01:45,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:01:45,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:01:45,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:01:45,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:01:45,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:01:45,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:01:45,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:01:45,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:01:45,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:01:45,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:01:45,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:01:46,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:01:46,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:01:46,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:01:46,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:01:46,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:01:46,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:01:46,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:01:46,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:01:46,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:01:46,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:01:46,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:01:46,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:01:46,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:01:46,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:01:46,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:01:46,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:01:46,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:01:46,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:01:46,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:01:46,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:01:46,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:01:46,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:01:46,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:01:46,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:01:46,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:01:46,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:01:46,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:01:46,054 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:01:46,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:01:46,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:01:46,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:01:46,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:01:46,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:01:46,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:01:46,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:01:46,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:01:46,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:46,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:01:46,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:01:46,058 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:01:46,058 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:01:46,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:01:46,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:01:46,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-12-21 18:01:46,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:01:46,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:01:46,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:01:46,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:01:46,387 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:01:46,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-21 18:01:46,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109a63d78/31c0ac2699d44df083de080cd6366b24/FLAG257ff6196 [2021-12-21 18:01:46,930 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:01:46,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-12-21 18:01:46,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109a63d78/31c0ac2699d44df083de080cd6366b24/FLAG257ff6196 [2021-12-21 18:01:46,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109a63d78/31c0ac2699d44df083de080cd6366b24 [2021-12-21 18:01:46,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:01:46,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:01:46,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:46,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:01:46,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:01:46,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f752c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46, skipping insertion in model container [2021-12-21 18:01:46,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:01:47,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:47,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:47,254 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:01:47,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:47,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:47,289 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:01:47,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:47,341 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:01:47,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47 WrapperNode [2021-12-21 18:01:47,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:47,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:47,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:01:47,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:01:47,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,389 INFO L137 Inliner]: procedures = 119, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-12-21 18:01:47,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:47,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:01:47,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:01:47,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:01:47,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:01:47,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:01:47,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:01:47,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:01:47,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (1/1) ... [2021-12-21 18:01:47,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:47,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:47,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:01:47,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:01:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-21 18:01:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:01:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-21 18:01:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:01:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 18:01:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:01:47,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:01:47,543 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:01:47,544 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:01:47,674 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:01:47,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:01:47,678 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 18:01:47,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:47 BoogieIcfgContainer [2021-12-21 18:01:47,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:01:47,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:01:47,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:01:47,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:01:47,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:01:46" (1/3) ... [2021-12-21 18:01:47,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a053d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:47, skipping insertion in model container [2021-12-21 18:01:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:47" (2/3) ... [2021-12-21 18:01:47,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a053d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:47, skipping insertion in model container [2021-12-21 18:01:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:47" (3/3) ... [2021-12-21 18:01:47,685 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder2-alloca-1.i [2021-12-21 18:01:47,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:01:47,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-21 18:01:47,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:01:47,717 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:01:47,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-21 18:01:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 18:01:47,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441858582] [2021-12-21 18:01:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:47,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:01:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:01:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:47,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:47,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441858582] [2021-12-21 18:01:47,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441858582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:01:47,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449176659] [2021-12-21 18:01:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:01:47,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:01:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:47,922 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,959 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-21 18:01:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:01:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:01:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,966 INFO L225 Difference]: With dead ends: 30 [2021-12-21 18:01:47,966 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 18:01:47,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:47,970 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 18:01:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-21 18:01:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-21 18:01:47,990 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-12-21 18:01:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,990 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-21 18:01:47,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-21 18:01:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:48,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:48,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-21 18:01:48,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:48,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456464439] [2021-12-21 18:01:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:48,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:48,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:01:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:01:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:48,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:48,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456464439] [2021-12-21 18:01:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456464439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:48,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:48,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:48,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806413635] [2021-12-21 18:01:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:48,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:48,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:48,361 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,459 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-21 18:01:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:01:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,461 INFO L225 Difference]: With dead ends: 57 [2021-12-21 18:01:48,461 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 18:01:48,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:48,462 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 18:01:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2021-12-21 18:01:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-21 18:01:48,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2021-12-21 18:01:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-21 18:01:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-21 18:01:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:48,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:48,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 18:01:48,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:48,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43775460] [2021-12-21 18:01:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:48,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:48,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:01:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:01:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:48,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:48,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43775460] [2021-12-21 18:01:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43775460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:48,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:48,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:48,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451705066] [2021-12-21 18:01:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:48,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:48,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:48,780 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,801 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-21 18:01:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:01:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,802 INFO L225 Difference]: With dead ends: 33 [2021-12-21 18:01:48,802 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 18:01:48,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:48,803 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 18:01:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 18:01:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-21 18:01:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-21 18:01:48,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-21 18:01:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,807 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-21 18:01:48,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-21 18:01:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:01:48,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-21 18:01:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,014 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-21 18:01:49,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628305945] [2021-12-21 18:01:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:49,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:49,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:49,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:01:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:01:49,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:49,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:49,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:49,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628305945] [2021-12-21 18:01:49,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628305945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:49,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:49,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:49,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681731181] [2021-12-21 18:01:49,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:49,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:49,084 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,158 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-21 18:01:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 18:01:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,159 INFO L225 Difference]: With dead ends: 32 [2021-12-21 18:01:49,159 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 18:01:49,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:49,160 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 18:01:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-12-21 18:01:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-21 18:01:49,163 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-12-21 18:01:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,163 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-21 18:01:49,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-21 18:01:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:01:49,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:49,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:49,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-21 18:01:49,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:49,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255711953] [2021-12-21 18:01:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:49,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:49,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:49,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:01:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:01:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:49,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:49,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255711953] [2021-12-21 18:01:49,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255711953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:49,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:49,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:01:49,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020841974] [2021-12-21 18:01:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:49,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:49,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:49,552 INFO L87 Difference]: Start difference. First operand 29 states and 33 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) [2021-12-21 18:01:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,573 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-21 18:01:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:49,573 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 [2021-12-21 18:01:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,573 INFO L225 Difference]: With dead ends: 32 [2021-12-21 18:01:49,573 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 18:01:49,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:49,574 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-21 18:01:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 18:01:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-21 18:01:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-21 18:01:49,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-12-21 18:01:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-21 18:01:49,578 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) [2021-12-21 18:01:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-21 18:01:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:01:49,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,578 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:49,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-21 18:01:49,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-21 18:01:49,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154556029] [2021-12-21 18:01:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:49,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:49,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:49,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:01:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:01:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:49,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154556029] [2021-12-21 18:01:49,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154556029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:49,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:49,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 18:01:49,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806773530] [2021-12-21 18:01:49,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:01:49,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:01:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:01:49,909 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,955 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-12-21 18:01:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:01:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 18:01:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,958 INFO L225 Difference]: With dead ends: 52 [2021-12-21 18:01:49,958 INFO L226 Difference]: Without dead ends: 52 [2021-12-21 18:01:49,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:01:49,959 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 133 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-21 18:01:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-12-21 18:01:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-21 18:01:49,961 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-12-21 18:01:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-21 18:01:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-21 18:01:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:01:49,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:49,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:50,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:50,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 18:01:50,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:50,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93321670] [2021-12-21 18:01:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:50,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:50,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:50,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:01:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:01:50,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:50,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:50,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93321670] [2021-12-21 18:01:50,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93321670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:50,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:50,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 18:01:50,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778744429] [2021-12-21 18:01:50,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:50,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:50,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:50,769 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:51,081 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-21 18:01:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:01:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 18:01:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:51,083 INFO L225 Difference]: With dead ends: 57 [2021-12-21 18:01:51,083 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 18:01:51,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:51,083 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:51,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 100 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2021-12-21 18:01:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 18:01:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-12-21 18:01:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-21 18:01:51,086 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-12-21 18:01:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:51,087 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-21 18:01:51,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-21 18:01:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:01:51,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:51,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:51,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:51,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:51,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-21 18:01:51,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774361951] [2021-12-21 18:01:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:51,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:51,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:01:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:01:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:51,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:51,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:51,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774361951] [2021-12-21 18:01:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774361951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:51,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:01:51,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119024301] [2021-12-21 18:01:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:51,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:51,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:51,415 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:51,552 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-12-21 18:01:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 18:01:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:51,553 INFO L225 Difference]: With dead ends: 74 [2021-12-21 18:01:51,553 INFO L226 Difference]: Without dead ends: 74 [2021-12-21 18:01:51,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:51,553 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:51,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 99 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-21 18:01:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-12-21 18:01:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-21 18:01:51,556 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2021-12-21 18:01:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:51,556 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-21 18:01:51,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-21 18:01:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:01:51,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:51,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:51,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:51,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-21 18:01:51,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437043348] [2021-12-21 18:01:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:51,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:51,760 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:51,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:01:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 18:01:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:51,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437043348] [2021-12-21 18:01:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437043348] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:52,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:01:52,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-21 18:01:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330968396] [2021-12-21 18:01:52,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:52,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:52,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:52,770 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:53,295 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-21 18:01:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 18:01:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:53,296 INFO L225 Difference]: With dead ends: 60 [2021-12-21 18:01:53,296 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 18:01:53,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:01:53,297 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:53,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 53 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:01:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 18:01:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-12-21 18:01:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-21 18:01:53,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 12 [2021-12-21 18:01:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:53,302 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-21 18:01:53,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-21 18:01:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:01:53,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:53,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:53,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:53,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:53,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-12-21 18:01:53,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224566062] [2021-12-21 18:01:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:53,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:53,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:01:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:01:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:53,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:53,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:53,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224566062] [2021-12-21 18:01:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224566062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:53,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:53,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698398629] [2021-12-21 18:01:53,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:53,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:53,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:53,604 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:53,635 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-12-21 18:01:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 18:01:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:53,636 INFO L225 Difference]: With dead ends: 64 [2021-12-21 18:01:53,636 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 18:01:53,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:53,637 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:53,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 18:01:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2021-12-21 18:01:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-21 18:01:53,640 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2021-12-21 18:01:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:53,640 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-21 18:01:53,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-21 18:01:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:01:53,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:53,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:53,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:53,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1346062156, now seen corresponding path program 1 times [2021-12-21 18:01:53,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:53,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262897260] [2021-12-21 18:01:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:53,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:53,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:53,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:01:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:01:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:54,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:54,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262897260] [2021-12-21 18:01:54,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262897260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:54,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:54,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 18:01:54,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600569153] [2021-12-21 18:01:54,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:54,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:01:54,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:01:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:54,078 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:54,248 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-12-21 18:01:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:01:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 18:01:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:54,249 INFO L225 Difference]: With dead ends: 66 [2021-12-21 18:01:54,249 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 18:01:54,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:01:54,249 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:54,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 81 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 18:01:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-12-21 18:01:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-21 18:01:54,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-12-21 18:01:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:54,251 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-21 18:01:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-21 18:01:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:01:54,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:54,256 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:54,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:54,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:54,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-12-21 18:01:54,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516284068] [2021-12-21 18:01:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:54,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:54,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:54,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:54,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:01:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:01:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:54,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:54,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516284068] [2021-12-21 18:01:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516284068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:54,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:54,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 18:01:54,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718945142] [2021-12-21 18:01:54,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:54,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:01:54,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:01:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:01:54,661 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:54,700 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-12-21 18:01:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:01:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:01:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:54,701 INFO L225 Difference]: With dead ends: 55 [2021-12-21 18:01:54,701 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 18:01:54,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:54,701 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:54,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 18:01:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-12-21 18:01:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-21 18:01:54,704 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-12-21 18:01:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:54,704 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-21 18:01:54,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-21 18:01:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:01:54,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:54,704 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:54,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:54,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-12-21 18:01:54,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:54,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203575071] [2021-12-21 18:01:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:54,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:54,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:54,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:01:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:01:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:54,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:55,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:55,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203575071] [2021-12-21 18:01:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203575071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:55,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-21 18:01:55,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927954294] [2021-12-21 18:01:55,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:01:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:01:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:01:55,658 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:56,288 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-21 18:01:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:01:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:56,290 INFO L225 Difference]: With dead ends: 82 [2021-12-21 18:01:56,290 INFO L226 Difference]: Without dead ends: 82 [2021-12-21 18:01:56,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:01:56,290 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:56,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2021-12-21 18:01:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-21 18:01:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2021-12-21 18:01:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-21 18:01:56,293 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-12-21 18:01:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-21 18:01:56,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-21 18:01:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:01:56,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:56,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:56,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:56,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:56,495 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-12-21 18:01:56,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51092570] [2021-12-21 18:01:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:56,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:56,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:01:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:01:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:01:56,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:56,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51092570] [2021-12-21 18:01:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51092570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:56,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686027119] [2021-12-21 18:01:56,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:56,668 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:56,674 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-12-21 18:01:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 18:01:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:56,676 INFO L225 Difference]: With dead ends: 92 [2021-12-21 18:01:56,676 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 18:01:56,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:56,677 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:56,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-12-21 18:01:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 18:01:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-12-21 18:01:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-12-21 18:01:56,691 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 18 [2021-12-21 18:01:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:56,691 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-12-21 18:01:56,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-12-21 18:01:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:01:56,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:56,695 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-21 18:01:56,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:56,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:56,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-21 18:01:56,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:56,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015712973] [2021-12-21 18:01:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:56,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:56,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:56,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 18:01:56,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:56,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:01:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:56,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:01:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:57,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:57,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:01:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015712973] [2021-12-21 18:01:57,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015712973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:57,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:01:57,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 18:01:57,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266820174] [2021-12-21 18:01:57,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:57,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:01:57,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:01:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:01:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:01:57,834 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:59,657 INFO L93 Difference]: Finished difference Result 233 states and 278 transitions. [2021-12-21 18:01:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:01:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 18:01:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:59,658 INFO L225 Difference]: With dead ends: 233 [2021-12-21 18:01:59,659 INFO L226 Difference]: Without dead ends: 233 [2021-12-21 18:01:59,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:01:59,659 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:59,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 258 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 41 Unchecked, 0.6s Time] [2021-12-21 18:01:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-21 18:01:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 98. [2021-12-21 18:01:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 97 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-12-21 18:01:59,663 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 18 [2021-12-21 18:01:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:59,663 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-12-21 18:01:59,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-12-21 18:01:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:01:59,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:59,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:59,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-21 18:01:59,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:01:59,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:01:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash 997947932, now seen corresponding path program 1 times [2021-12-21 18:01:59,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:01:59,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592147382] [2021-12-21 18:01:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:59,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:01:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:01:59,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:01:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 18:01:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:01:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:02:00,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:02:00,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592147382] [2021-12-21 18:02:00,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592147382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:02:00,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:02:00,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:02:00,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387971485] [2021-12-21 18:02:00,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:02:00,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:02:00,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:02:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:02:00,144 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:00,150 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-12-21 18:02:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:02:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 18:02:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:00,151 INFO L225 Difference]: With dead ends: 97 [2021-12-21 18:02:00,151 INFO L226 Difference]: Without dead ends: 76 [2021-12-21 18:02:00,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:02:00,151 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:00,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-21 18:02:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-21 18:02:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-12-21 18:02:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-12-21 18:02:00,153 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2021-12-21 18:02:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:00,153 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-12-21 18:02:00,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-12-21 18:02:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:02:00,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:00,154 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:00,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:00,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:00,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 861855476, now seen corresponding path program 2 times [2021-12-21 18:02:00,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002635480] [2021-12-21 18:02:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:00,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:00,382 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:00,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 18:02:00,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:00,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:02:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:00,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:00,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:02,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:02,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002635480] [2021-12-21 18:02:02,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002635480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:02,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:02,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-12-21 18:02:02,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115232893] [2021-12-21 18:02:02,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:02:02,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:02:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:02:02,551 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:04,860 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-12-21 18:02:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:02:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 18:02:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:04,861 INFO L225 Difference]: With dead ends: 102 [2021-12-21 18:02:04,861 INFO L226 Difference]: Without dead ends: 99 [2021-12-21 18:02:04,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:02:04,862 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:04,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 205 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 200 Invalid, 0 Unknown, 35 Unchecked, 1.1s Time] [2021-12-21 18:02:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-21 18:02:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2021-12-21 18:02:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-12-21 18:02:04,865 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 24 [2021-12-21 18:02:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:04,865 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-12-21 18:02:04,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-12-21 18:02:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:02:04,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:04,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:04,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:05,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:05,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash -437341689, now seen corresponding path program 1 times [2021-12-21 18:02:05,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850415384] [2021-12-21 18:02:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:05,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:05,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 18:02:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:02:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:05,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:02:05,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:02:07,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850415384] [2021-12-21 18:02:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850415384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:07,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-12-21 18:02:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026689316] [2021-12-21 18:02:07,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:02:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:02:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:02:07,490 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:08,375 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-12-21 18:02:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:02:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) Word has length 30 [2021-12-21 18:02:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:08,377 INFO L225 Difference]: With dead ends: 112 [2021-12-21 18:02:08,377 INFO L226 Difference]: Without dead ends: 99 [2021-12-21 18:02:08,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:02:08,378 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:08,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 9 Unchecked, 0.6s Time] [2021-12-21 18:02:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-21 18:02:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-12-21 18:02:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.1875) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-12-21 18:02:08,380 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 30 [2021-12-21 18:02:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:08,381 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-12-21 18:02:08,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-12-21 18:02:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:02:08,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:08,381 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:08,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-21 18:02:08,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:08,593 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1191228026, now seen corresponding path program 3 times [2021-12-21 18:02:08,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:08,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386457775] [2021-12-21 18:02:08,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:08,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:08,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 18:02:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:02:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 18:02:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:08,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:02:09,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:02:10,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386457775] [2021-12-21 18:02:10,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386457775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:10,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:10,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-21 18:02:11,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640109886] [2021-12-21 18:02:11,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:11,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:02:11,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:02:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:02:11,000 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:15,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:02:17,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:02:18,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:02:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:19,753 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2021-12-21 18:02:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:02:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 18:02:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:19,754 INFO L225 Difference]: With dead ends: 147 [2021-12-21 18:02:19,754 INFO L226 Difference]: Without dead ends: 147 [2021-12-21 18:02:19,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:02:19,755 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 236 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:19,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 197 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 243 Invalid, 0 Unknown, 49 Unchecked, 6.1s Time] [2021-12-21 18:02:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-21 18:02:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 95. [2021-12-21 18:02:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-12-21 18:02:19,757 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 32 [2021-12-21 18:02:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-12-21 18:02:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-12-21 18:02:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:02:19,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:19,758 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-21 18:02:19,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:19,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:19,959 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-21 18:02:19,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368012082] [2021-12-21 18:02:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:19,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:19,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 18:02:20,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 18:02:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:02:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:20,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:20,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:23,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368012082] [2021-12-21 18:02:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368012082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:23,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 18:02:23,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868736751] [2021-12-21 18:02:23,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:02:23,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:02:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:02:23,557 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:40,479 INFO L93 Difference]: Finished difference Result 847 states and 952 transitions. [2021-12-21 18:02:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 18:02:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 18:02:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:40,487 INFO L225 Difference]: With dead ends: 847 [2021-12-21 18:02:40,488 INFO L226 Difference]: Without dead ends: 847 [2021-12-21 18:02:40,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=687, Invalid=1569, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:02:40,489 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 703 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:40,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 557 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 647 Invalid, 0 Unknown, 72 Unchecked, 2.3s Time] [2021-12-21 18:02:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-12-21 18:02:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 127. [2021-12-21 18:02:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-12-21 18:02:40,498 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 34 [2021-12-21 18:02:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:40,498 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-12-21 18:02:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-12-21 18:02:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 18:02:40,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:40,500 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:40,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:40,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:40,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:40,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1920076995, now seen corresponding path program 4 times [2021-12-21 18:02:40,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:40,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127702] [2021-12-21 18:02:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:02:40,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:40,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:40,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 18:02:40,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:02:40,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:02:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:40,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:02:41,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:44,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127702] [2021-12-21 18:02:44,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:44,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:44,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-12-21 18:02:44,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204689016] [2021-12-21 18:02:44,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:02:44,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:02:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:02:44,993 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:50,911 INFO L93 Difference]: Finished difference Result 240 states and 278 transitions. [2021-12-21 18:02:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 18:02:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-21 18:02:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:50,913 INFO L225 Difference]: With dead ends: 240 [2021-12-21 18:02:50,913 INFO L226 Difference]: Without dead ends: 237 [2021-12-21 18:02:50,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 18:02:50,914 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:50,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 552 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 668 Invalid, 0 Unknown, 7 Unchecked, 4.1s Time] [2021-12-21 18:02:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-21 18:02:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 151. [2021-12-21 18:02:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 150 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 177 transitions. [2021-12-21 18:02:50,917 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 177 transitions. Word has length 44 [2021-12-21 18:02:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:50,917 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 177 transitions. [2021-12-21 18:02:50,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 177 transitions. [2021-12-21 18:02:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:02:50,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:50,919 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:50,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:51,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:02:51,120 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:02:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 121819862, now seen corresponding path program 2 times [2021-12-21 18:02:51,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:02:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829339731] [2021-12-21 18:02:51,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:51,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:02:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:02:51,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:02:51,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 18:02:51,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:02:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:51,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:02:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 18:02:51,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:02:55,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:02:55,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829339731] [2021-12-21 18:02:55,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829339731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:55,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:02:55,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-12-21 18:02:55,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812415614] [2021-12-21 18:02:55,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:55,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:02:55,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:02:55,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:02:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:02:55,715 INFO L87 Difference]: Start difference. First operand 151 states and 177 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:03:02,651 INFO L93 Difference]: Finished difference Result 278 states and 317 transitions. [2021-12-21 18:03:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 18:03:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-21 18:03:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:03:02,653 INFO L225 Difference]: With dead ends: 278 [2021-12-21 18:03:02,654 INFO L226 Difference]: Without dead ends: 262 [2021-12-21 18:03:02,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 18:03:02,654 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 127 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:03:02,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 639 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 626 Invalid, 0 Unknown, 246 Unchecked, 3.2s Time] [2021-12-21 18:03:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-21 18:03:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 151. [2021-12-21 18:03:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 150 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2021-12-21 18:03:02,657 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 50 [2021-12-21 18:03:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:03:02,657 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2021-12-21 18:03:02,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:03:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2021-12-21 18:03:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:03:02,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:03:02,658 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:03:02,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:03:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:03:02,867 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-21 18:03:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:03:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 426224534, now seen corresponding path program 3 times [2021-12-21 18:03:02,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:03:02,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677159166] [2021-12-21 18:03:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:03:02,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:03:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:03:02,870 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:03:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 18:03:03,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 18:03:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:03:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:03:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:03:03,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:03:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 18:03:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates...