./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:20:57,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:20:57,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:20:57,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:20:57,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:20:57,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:20:57,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:20:57,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:20:57,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:20:57,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:20:57,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:20:57,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:20:57,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:20:57,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:20:57,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:20:57,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:20:57,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:20:57,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:20:57,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:20:57,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:20:57,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:20:57,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:20:57,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:20:57,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:20:57,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:20:57,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:20:57,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:20:57,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:20:57,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:20:57,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:20:57,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:20:57,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:20:57,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:20:57,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:20:57,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:20:57,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:20:57,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:20:57,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:20:57,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:20:57,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:20:57,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:20:57,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 19:20:57,477 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:20:57,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:20:57,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:20:57,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:20:57,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:20:57,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:20:57,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:20:57,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:20:57,479 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:20:57,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:20:57,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:20:57,480 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:20:57,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:20:57,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:20:57,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:20:57,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:20:57,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:20:57,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:20:57,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:20:57,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:20:57,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:20:57,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:20:57,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:20:57,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:20:57,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:20:57,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-12-22 19:20:57,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:20:57,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:20:57,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:20:57,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:20:57,687 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:20:57,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-12-22 19:20:57,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2be7f17/e3034bdcca404d13badff46f42521929/FLAG2c30088de [2021-12-22 19:20:58,198 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:20:58,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-12-22 19:20:58,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2be7f17/e3034bdcca404d13badff46f42521929/FLAG2c30088de [2021-12-22 19:20:58,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2be7f17/e3034bdcca404d13badff46f42521929 [2021-12-22 19:20:58,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:20:58,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:20:58,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:58,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:20:58,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:20:58,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:58" (1/1) ... [2021-12-22 19:20:58,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b87e145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58, skipping insertion in model container [2021-12-22 19:20:58,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:58" (1/1) ... [2021-12-22 19:20:58,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:20:58,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:20:58,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-12-22 19:20:59,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:20:59,188 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) [2021-12-22 19:20:59,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19ac897a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:59, skipping insertion in model container [2021-12-22 19:20:59,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:59,189 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 19:20:59,191 INFO L158 Benchmark]: Toolchain (without parser) took 678.37ms. Allocated memory is still 100.7MB. Free memory was 60.2MB in the beginning and 56.8MB in the end (delta: 3.5MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-12-22 19:20:59,191 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:20:59,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 674.32ms. Allocated memory is still 100.7MB. Free memory was 60.0MB in the beginning and 56.8MB in the end (delta: 3.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-12-22 19:20:59,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 674.32ms. Allocated memory is still 100.7MB. Free memory was 60.0MB in the beginning and 56.8MB in the end (delta: 3.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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/uthash-2.0.2/uthash_SFH_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:21:00,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:21:00,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:21:00,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:21:00,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:21:00,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:21:00,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:21:00,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:21:00,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:21:00,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:21:00,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:21:00,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:21:00,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:21:00,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:21:00,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:21:00,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:21:00,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:21:00,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:21:00,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:21:00,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:21:00,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:21:00,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:21:00,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:21:00,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:21:00,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:21:00,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:21:00,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:21:00,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:21:00,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:21:00,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:21:00,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:21:00,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:21:00,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:21:00,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:21:00,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:21:00,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:21:00,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:21:00,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:21:00,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:21:00,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:21:00,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:21:00,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 19:21:00,903 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:21:00,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:21:00,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:21:00,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:21:00,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:21:00,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:21:00,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:21:00,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:21:00,907 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:21:00,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:21:00,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 19:21:00,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:21:00,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:21:00,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:21:00,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:21:00,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:21:00,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:21:00,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:21:00,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:21:00,911 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 19:21:00,911 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 19:21:00,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:21:00,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 19:21:00,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-12-22 19:21:01,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:21:01,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:21:01,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:21:01,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:21:01,204 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:21:01,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-12-22 19:21:01,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017c362ba/196b2e0f0d3c4b6cb2df37bd55459bca/FLAG7bb2a9311 [2021-12-22 19:21:01,728 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:21:01,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-12-22 19:21:01,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017c362ba/196b2e0f0d3c4b6cb2df37bd55459bca/FLAG7bb2a9311 [2021-12-22 19:21:02,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017c362ba/196b2e0f0d3c4b6cb2df37bd55459bca [2021-12-22 19:21:02,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:21:02,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:21:02,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:21:02,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:21:02,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:21:02,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:02" (1/1) ... [2021-12-22 19:21:02,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662e425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:02, skipping insertion in model container [2021-12-22 19:21:02,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:02" (1/1) ... [2021-12-22 19:21:02,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:21:02,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:21:02,636 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-12-22 19:21:02,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:21:02,885 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 19:21:02,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:21:02,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-12-22 19:21:03,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:21:03,015 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:21:03,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-12-22 19:21:03,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:21:03,166 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:21:03,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03 WrapperNode [2021-12-22 19:21:03,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:21:03,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:21:03,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:21:03,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:21:03,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,314 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2348 [2021-12-22 19:21:03,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:21:03,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:21:03,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:21:03,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:21:03,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:21:03,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:21:03,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:21:03,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:21:03,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (1/1) ... [2021-12-22 19:21:03,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:21:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:21:03,464 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) [2021-12-22 19:21:03,489 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 [2021-12-22 19:21:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 19:21:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 19:21:03,502 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 19:21:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 19:21:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 19:21:03,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 19:21:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 19:21:03,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 19:21:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 19:21:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 19:21:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:21:03,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:21:03,805 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:21:03,806 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:21:03,838 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 19:21:10,718 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:21:10,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:21:10,750 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-12-22 19:21:10,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:10 BoogieIcfgContainer [2021-12-22 19:21:10,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:21:10,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:21:10,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:21:10,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:21:10,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:21:02" (1/3) ... [2021-12-22 19:21:10,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487268ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:10, skipping insertion in model container [2021-12-22 19:21:10,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:03" (2/3) ... [2021-12-22 19:21:10,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487268ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:10, skipping insertion in model container [2021-12-22 19:21:10,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:10" (3/3) ... [2021-12-22 19:21:10,762 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-2.i [2021-12-22 19:21:10,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:21:10,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1095 error locations. [2021-12-22 19:21:10,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:21:10,814 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 [2021-12-22 19:21:10,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1095 error locations. [2021-12-22 19:21:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-22 19:21:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:21:10,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:10,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:21:10,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-22 19:21:10,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672173918] [2021-12-22 19:21:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:10,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:10,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:10,879 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) [2021-12-22 19:21:10,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 19:21:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:11,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:11,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:11,180 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 [2021-12-22 19:21:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:11,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:11,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:11,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672173918] [2021-12-22 19:21:11,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672173918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:11,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:11,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:11,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378602833] [2021-12-22 19:21:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:11,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:11,265 INFO L87 Difference]: Start difference. First operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:14,837 INFO L93 Difference]: Finished difference Result 2934 states and 3120 transitions. [2021-12-22 19:21:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 19:21:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:14,874 INFO L225 Difference]: With dead ends: 2934 [2021-12-22 19:21:14,874 INFO L226 Difference]: Without dead ends: 2932 [2021-12-22 19:21:14,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:14,879 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 2142 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:14,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 1869 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 19:21:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-12-22 19:21:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2401. [2021-12-22 19:21:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1318 states have (on average 2.0515933232169954) internal successors, (2704), 2385 states have internal predecessors, (2704), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 19:21:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2736 transitions. [2021-12-22 19:21:15,010 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2736 transitions. Word has length 3 [2021-12-22 19:21:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:15,011 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 2736 transitions. [2021-12-22 19:21:15,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2736 transitions. [2021-12-22 19:21:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:21:15,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:15,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:21:15,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:15,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:15,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-22 19:21:15,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612328476] [2021-12-22 19:21:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:15,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:15,225 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) [2021-12-22 19:21:15,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 19:21:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:15,440 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 [2021-12-22 19:21:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:15,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:15,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612328476] [2021-12-22 19:21:15,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612328476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:15,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:15,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:15,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398957516] [2021-12-22 19:21:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:15,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:15,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:15,459 INFO L87 Difference]: Start difference. First operand 2401 states and 2736 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:20,243 INFO L93 Difference]: Finished difference Result 3371 states and 3798 transitions. [2021-12-22 19:21:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 19:21:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:20,256 INFO L225 Difference]: With dead ends: 3371 [2021-12-22 19:21:20,256 INFO L226 Difference]: Without dead ends: 3371 [2021-12-22 19:21:20,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:20,258 INFO L933 BasicCegarLoop]: 1951 mSDtfsCounter, 1054 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:20,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 3245 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-22 19:21:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-12-22 19:21:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2850. [2021-12-22 19:21:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1765 states have (on average 2.009631728045326) internal successors, (3547), 2831 states have internal predecessors, (3547), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-22 19:21:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3585 transitions. [2021-12-22 19:21:20,342 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3585 transitions. Word has length 3 [2021-12-22 19:21:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:20,342 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3585 transitions. [2021-12-22 19:21:20,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3585 transitions. [2021-12-22 19:21:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 19:21:20,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:20,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:20,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:20,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-22 19:21:20,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555954671] [2021-12-22 19:21:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:20,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:20,556 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) [2021-12-22 19:21:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 19:21:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 19:21:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:20,729 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 [2021-12-22 19:21:20,734 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 6 treesize of output 5 [2021-12-22 19:21:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 19:21:20,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 19:21:20,791 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 19:21:20,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-22 19:21:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:20,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:20,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555954671] [2021-12-22 19:21:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555954671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:20,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:20,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:20,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669076699] [2021-12-22 19:21:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:20,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:20,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:20,816 INFO L87 Difference]: Start difference. First operand 2850 states and 3585 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:29,524 INFO L93 Difference]: Finished difference Result 5481 states and 6388 transitions. [2021-12-22 19:21:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-22 19:21:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:29,552 INFO L225 Difference]: With dead ends: 5481 [2021-12-22 19:21:29,552 INFO L226 Difference]: Without dead ends: 5481 [2021-12-22 19:21:29,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:29,555 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 2765 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:29,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2775 Valid, 2890 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-12-22 19:21:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-12-22 19:21:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3569. [2021-12-22 19:21:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2484 states have (on average 2.0426731078904994) internal successors, (5074), 3544 states have internal predecessors, (5074), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 5124 transitions. [2021-12-22 19:21:29,635 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 5124 transitions. Word has length 7 [2021-12-22 19:21:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:29,638 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 5124 transitions. [2021-12-22 19:21:29,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 5124 transitions. [2021-12-22 19:21:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:21:29,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:29,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:29,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:29,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:29,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-22 19:21:29,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983375525] [2021-12-22 19:21:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:29,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:29,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:29,864 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) [2021-12-22 19:21:29,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 19:21:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:30,025 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 [2021-12-22 19:21:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:30,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:30,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:30,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983375525] [2021-12-22 19:21:30,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983375525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:30,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:30,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:30,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495585928] [2021-12-22 19:21:30,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:30,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:30,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:30,038 INFO L87 Difference]: Start difference. First operand 3569 states and 5124 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-22 19:21:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:33,041 INFO L93 Difference]: Finished difference Result 4773 states and 6641 transitions. [2021-12-22 19:21:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-12-22 19:21:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:33,057 INFO L225 Difference]: With dead ends: 4773 [2021-12-22 19:21:33,058 INFO L226 Difference]: Without dead ends: 4773 [2021-12-22 19:21:33,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:33,058 INFO L933 BasicCegarLoop]: 2177 mSDtfsCounter, 1998 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:33,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2933 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 19:21:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-12-22 19:21:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 3478. [2021-12-22 19:21:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 2484 states have (on average 1.9569243156199678) internal successors, (4861), 3453 states have internal predecessors, (4861), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4911 transitions. [2021-12-22 19:21:33,131 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4911 transitions. Word has length 8 [2021-12-22 19:21:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:33,131 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 4911 transitions. [2021-12-22 19:21:33,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-22 19:21:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4911 transitions. [2021-12-22 19:21:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:21:33,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:33,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:33,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:33,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:33,342 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-22 19:21:33,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:33,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746134789] [2021-12-22 19:21:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:33,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:33,344 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) [2021-12-22 19:21:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 19:21:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:33,547 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 [2021-12-22 19:21:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:33,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:33,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:33,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746134789] [2021-12-22 19:21:33,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746134789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:33,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:33,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:33,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110161478] [2021-12-22 19:21:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:33,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:33,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:33,572 INFO L87 Difference]: Start difference. First operand 3478 states and 4911 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-22 19:21:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:37,877 INFO L93 Difference]: Finished difference Result 5193 states and 7269 transitions. [2021-12-22 19:21:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-12-22 19:21:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:37,895 INFO L225 Difference]: With dead ends: 5193 [2021-12-22 19:21:37,895 INFO L226 Difference]: Without dead ends: 5193 [2021-12-22 19:21:37,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:37,896 INFO L933 BasicCegarLoop]: 2557 mSDtfsCounter, 1369 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:37,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3648 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-22 19:21:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-12-22 19:21:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3800. [2021-12-22 19:21:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 2816 states have (on average 1.9435369318181819) internal successors, (5473), 3775 states have internal predecessors, (5473), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5523 transitions. [2021-12-22 19:21:37,988 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5523 transitions. Word has length 8 [2021-12-22 19:21:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:37,989 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 5523 transitions. [2021-12-22 19:21:37,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-12-22 19:21:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5523 transitions. [2021-12-22 19:21:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 19:21:37,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:37,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:38,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:38,198 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-22 19:21:38,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:38,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21411515] [2021-12-22 19:21:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:38,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:38,200 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) [2021-12-22 19:21:38,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 19:21:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:38,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:38,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:38,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21411515] [2021-12-22 19:21:38,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21411515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:38,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:38,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:38,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227903908] [2021-12-22 19:21:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:38,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:38,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:38,375 INFO L87 Difference]: Start difference. First operand 3800 states and 5523 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:38,411 INFO L93 Difference]: Finished difference Result 3740 states and 5437 transitions. [2021-12-22 19:21:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:38,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 19:21:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:38,423 INFO L225 Difference]: With dead ends: 3740 [2021-12-22 19:21:38,423 INFO L226 Difference]: Without dead ends: 3740 [2021-12-22 19:21:38,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:38,424 INFO L933 BasicCegarLoop]: 2221 mSDtfsCounter, 1011 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 3437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:38,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 3437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-12-22 19:21:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3740. [2021-12-22 19:21:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 2780 states have (on average 1.9377697841726618) internal successors, (5387), 3715 states have internal predecessors, (5387), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 5437 transitions. [2021-12-22 19:21:38,470 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 5437 transitions. Word has length 11 [2021-12-22 19:21:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:38,470 INFO L470 AbstractCegarLoop]: Abstraction has 3740 states and 5437 transitions. [2021-12-22 19:21:38,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 5437 transitions. [2021-12-22 19:21:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 19:21:38,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:38,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:38,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:38,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-22 19:21:38,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:38,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617020945] [2021-12-22 19:21:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:38,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:38,680 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) [2021-12-22 19:21:38,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 19:21:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:38,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:38,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:38,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617020945] [2021-12-22 19:21:38,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617020945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:38,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:38,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:38,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979498579] [2021-12-22 19:21:38,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:38,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:38,885 INFO L87 Difference]: Start difference. First operand 3740 states and 5437 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:38,955 INFO L93 Difference]: Finished difference Result 3712 states and 5381 transitions. [2021-12-22 19:21:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 19:21:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:38,974 INFO L225 Difference]: With dead ends: 3712 [2021-12-22 19:21:38,974 INFO L226 Difference]: Without dead ends: 3712 [2021-12-22 19:21:38,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:38,976 INFO L933 BasicCegarLoop]: 2176 mSDtfsCounter, 982 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 5561 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:38,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 5561 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-12-22 19:21:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3710. [2021-12-22 19:21:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 2764 states have (on average 1.9280028943560057) internal successors, (5329), 3685 states have internal predecessors, (5329), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5379 transitions. [2021-12-22 19:21:39,029 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5379 transitions. Word has length 13 [2021-12-22 19:21:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 3710 states and 5379 transitions. [2021-12-22 19:21:39,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5379 transitions. [2021-12-22 19:21:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:21:39,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:39,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:39,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:39,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:39,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-22 19:21:39,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:39,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218277781] [2021-12-22 19:21:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:39,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:39,244 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) [2021-12-22 19:21:39,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 19:21:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:39,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:39,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:39,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218277781] [2021-12-22 19:21:39,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218277781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:39,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:39,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:39,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179908468] [2021-12-22 19:21:39,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:39,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:39,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:39,451 INFO L87 Difference]: Start difference. First operand 3710 states and 5379 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:39,496 INFO L93 Difference]: Finished difference Result 5158 states and 6946 transitions. [2021-12-22 19:21:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-22 19:21:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:39,505 INFO L225 Difference]: With dead ends: 5158 [2021-12-22 19:21:39,505 INFO L226 Difference]: Without dead ends: 5158 [2021-12-22 19:21:39,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:39,506 INFO L933 BasicCegarLoop]: 3496 mSDtfsCounter, 2102 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 5112 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:39,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 5112 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-12-22 19:21:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3650. [2021-12-22 19:21:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 2728 states have (on average 1.9219208211143695) internal successors, (5243), 3625 states have internal predecessors, (5243), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5293 transitions. [2021-12-22 19:21:39,578 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5293 transitions. Word has length 20 [2021-12-22 19:21:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 3650 states and 5293 transitions. [2021-12-22 19:21:39,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5293 transitions. [2021-12-22 19:21:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:21:39,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:39,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:39,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:39,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:39,788 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-22 19:21:39,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925996113] [2021-12-22 19:21:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:39,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:39,791 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) [2021-12-22 19:21:39,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 19:21:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:40,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:40,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:40,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925996113] [2021-12-22 19:21:40,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925996113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:40,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:40,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:40,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971685791] [2021-12-22 19:21:40,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:40,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:40,014 INFO L87 Difference]: Start difference. First operand 3650 states and 5293 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:40,050 INFO L93 Difference]: Finished difference Result 4991 states and 6655 transitions. [2021-12-22 19:21:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-22 19:21:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:40,058 INFO L225 Difference]: With dead ends: 4991 [2021-12-22 19:21:40,058 INFO L226 Difference]: Without dead ends: 4991 [2021-12-22 19:21:40,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:40,060 INFO L933 BasicCegarLoop]: 3628 mSDtfsCounter, 2059 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:40,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2069 Valid, 5196 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-12-22 19:21:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3518. [2021-12-22 19:21:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 2620 states have (on average 1.9026717557251909) internal successors, (4985), 3493 states have internal predecessors, (4985), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 5035 transitions. [2021-12-22 19:21:40,104 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 5035 transitions. Word has length 20 [2021-12-22 19:21:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:40,104 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 5035 transitions. [2021-12-22 19:21:40,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 5035 transitions. [2021-12-22 19:21:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:21:40,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:40,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:40,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-22 19:21:40,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:40,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-22 19:21:40,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133335631] [2021-12-22 19:21:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:40,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:40,315 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) [2021-12-22 19:21:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 19:21:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:40,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:40,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:40,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133335631] [2021-12-22 19:21:40,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133335631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:40,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:40,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880626844] [2021-12-22 19:21:40,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:40,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:40,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:40,535 INFO L87 Difference]: Start difference. First operand 3518 states and 5035 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:40,610 INFO L93 Difference]: Finished difference Result 4956 states and 6589 transitions. [2021-12-22 19:21:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 19:21:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:40,617 INFO L225 Difference]: With dead ends: 4956 [2021-12-22 19:21:40,617 INFO L226 Difference]: Without dead ends: 4956 [2021-12-22 19:21:40,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:40,618 INFO L933 BasicCegarLoop]: 3588 mSDtfsCounter, 2030 mSDsluCounter, 5154 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 8742 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:40,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 8742 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-12-22 19:21:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 3488. [2021-12-22 19:21:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 2604 states have (on average 1.892089093701997) internal successors, (4927), 3463 states have internal predecessors, (4927), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4977 transitions. [2021-12-22 19:21:40,669 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4977 transitions. Word has length 22 [2021-12-22 19:21:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:40,670 INFO L470 AbstractCegarLoop]: Abstraction has 3488 states and 4977 transitions. [2021-12-22 19:21:40,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4977 transitions. [2021-12-22 19:21:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:21:40,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:40,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:40,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:40,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:40,891 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-22 19:21:40,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:40,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626402528] [2021-12-22 19:21:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:40,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:40,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:40,893 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) [2021-12-22 19:21:40,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 19:21:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:41,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:41,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626402528] [2021-12-22 19:21:41,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626402528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:41,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:41,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:41,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312019898] [2021-12-22 19:21:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:41,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:41,119 INFO L87 Difference]: Start difference. First operand 3488 states and 4977 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:41,200 INFO L93 Difference]: Finished difference Result 4883 states and 6400 transitions. [2021-12-22 19:21:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 19:21:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:41,210 INFO L225 Difference]: With dead ends: 4883 [2021-12-22 19:21:41,210 INFO L226 Difference]: Without dead ends: 4883 [2021-12-22 19:21:41,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:41,211 INFO L933 BasicCegarLoop]: 3513 mSDtfsCounter, 1995 mSDsluCounter, 5039 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 8552 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:41,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 8552 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-12-22 19:21:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 3426. [2021-12-22 19:21:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 2556 states have (on average 1.859546165884194) internal successors, (4753), 3401 states have internal predecessors, (4753), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4803 transitions. [2021-12-22 19:21:41,273 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4803 transitions. Word has length 22 [2021-12-22 19:21:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:41,275 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4803 transitions. [2021-12-22 19:21:41,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4803 transitions. [2021-12-22 19:21:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:21:41,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:41,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:41,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:41,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:41,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-22 19:21:41,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13634090] [2021-12-22 19:21:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:41,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:41,485 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) [2021-12-22 19:21:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 19:21:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:41,679 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 [2021-12-22 19:21:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:41,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:41,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13634090] [2021-12-22 19:21:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13634090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:41,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:41,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:41,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934021537] [2021-12-22 19:21:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:41,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:41,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:41,742 INFO L87 Difference]: Start difference. First operand 3426 states and 4803 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:45,063 INFO L93 Difference]: Finished difference Result 3878 states and 5162 transitions. [2021-12-22 19:21:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 19:21:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:45,071 INFO L225 Difference]: With dead ends: 3878 [2021-12-22 19:21:45,072 INFO L226 Difference]: Without dead ends: 3878 [2021-12-22 19:21:45,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:45,073 INFO L933 BasicCegarLoop]: 1244 mSDtfsCounter, 2745 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2751 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:45,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2751 Valid, 2342 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 19:21:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-12-22 19:21:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3422. [2021-12-22 19:21:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2556 states have (on average 1.85641627543036) internal successors, (4745), 3397 states have internal predecessors, (4745), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4795 transitions. [2021-12-22 19:21:45,146 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4795 transitions. Word has length 27 [2021-12-22 19:21:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:45,146 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4795 transitions. [2021-12-22 19:21:45,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4795 transitions. [2021-12-22 19:21:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:21:45,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:45,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:45,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:45,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:45,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-22 19:21:45,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751304120] [2021-12-22 19:21:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:45,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:45,358 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) [2021-12-22 19:21:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 19:21:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:21:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:45,558 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 [2021-12-22 19:21:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:45,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:45,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751304120] [2021-12-22 19:21:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751304120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:45,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:45,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:45,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540041193] [2021-12-22 19:21:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:45,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:45,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:45,704 INFO L87 Difference]: Start difference. First operand 3422 states and 4795 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:51,118 INFO L93 Difference]: Finished difference Result 4323 states and 5779 transitions. [2021-12-22 19:21:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:21:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 19:21:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:51,124 INFO L225 Difference]: With dead ends: 4323 [2021-12-22 19:21:51,124 INFO L226 Difference]: Without dead ends: 4323 [2021-12-22 19:21:51,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:51,125 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1907 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:51,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 3817 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-22 19:21:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-12-22 19:21:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 3458. [2021-12-22 19:21:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 2592 states have (on average 1.8464506172839505) internal successors, (4786), 3433 states have internal predecessors, (4786), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4836 transitions. [2021-12-22 19:21:51,169 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4836 transitions. Word has length 27 [2021-12-22 19:21:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:51,169 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 4836 transitions. [2021-12-22 19:21:51,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4836 transitions. [2021-12-22 19:21:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:51,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:51,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:51,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-22 19:21:51,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:51,398 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-22 19:21:51,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:51,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855010695] [2021-12-22 19:21:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:51,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:51,401 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) [2021-12-22 19:21:51,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 19:21:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:51,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:51,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:51,614 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 [2021-12-22 19:21:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:51,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:51,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855010695] [2021-12-22 19:21:51,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855010695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:51,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:51,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:51,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421965860] [2021-12-22 19:21:51,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:51,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:51,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:51,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:51,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:51,701 INFO L87 Difference]: Start difference. First operand 3458 states and 4836 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-12-22 19:21:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:55,908 INFO L93 Difference]: Finished difference Result 6686 states and 9193 transitions. [2021-12-22 19:21:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:21:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 19:21:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:55,919 INFO L225 Difference]: With dead ends: 6686 [2021-12-22 19:21:55,919 INFO L226 Difference]: Without dead ends: 6686 [2021-12-22 19:21:55,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:55,920 INFO L933 BasicCegarLoop]: 2703 mSDtfsCounter, 3693 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 4839 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:55,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3700 Valid, 4839 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-22 19:21:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6686 states. [2021-12-22 19:21:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6686 to 3454. [2021-12-22 19:21:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 2592 states have (on average 1.8433641975308641) internal successors, (4778), 3429 states have internal predecessors, (4778), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4828 transitions. [2021-12-22 19:21:55,975 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4828 transitions. Word has length 36 [2021-12-22 19:21:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:55,976 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 4828 transitions. [2021-12-22 19:21:55,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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) [2021-12-22 19:21:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4828 transitions. [2021-12-22 19:21:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:55,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:55,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:56,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:56,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:56,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 19:21:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-12-22 19:21:56,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853057149] [2021-12-22 19:21:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:56,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:56,195 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) [2021-12-22 19:21:56,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 19:21:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:21:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:56,440 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 [2021-12-22 19:21:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:56,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:56,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853057149] [2021-12-22 19:21:56,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853057149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:56,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:56,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:56,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005737324] [2021-12-22 19:21:56,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:56,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:56,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:56,618 INFO L87 Difference]: Start difference. First operand 3454 states and 4828 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 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)