./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_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_OAT_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 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:48:18,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:48:18,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:48:18,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:48:18,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:48:18,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:48:18,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:48:18,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:48:18,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:48:18,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:48:18,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:48:18,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:48:18,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:48:18,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:48:18,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:48:18,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:48:18,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:48:18,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:48:18,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:48:18,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:48:18,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:48:18,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:48:18,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:48:18,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:48:18,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:48:18,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:48:18,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:48:18,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:48:18,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:48:18,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:48:18,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:48:18,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:48:18,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:48:18,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:48:18,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:48:18,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:48:18,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:48:18,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:48:18,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:48:18,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:48:18,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:48:18,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 02:48:18,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:48:18,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:48:18,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:48:18,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:48:18,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:48:18,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:48:18,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:48:18,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:48:18,478 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:48:18,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:48:18,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 02:48:18,478 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:48:18,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:48:18,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 02:48:18,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:48:18,479 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:48:18,479 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:48:18,479 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:48:18,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:48:18,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:48:18,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 02:48:18,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:48:18,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:48:18,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:48:18,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:48:18,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:48:18,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:48:18,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:48:18,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 02:48:18,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 02:48:18,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:48:18,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-12-22 02:48:18,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:48:18,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:48:18,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:48:18,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:48:18,719 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:48:18,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-12-22 02:48:18,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa0af6590/82f66aeddbfc4f449fbd73c9aeb650c3/FLAGe4b7b1f1f [2021-12-22 02:48:19,333 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:48:19,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-12-22 02:48:19,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa0af6590/82f66aeddbfc4f449fbd73c9aeb650c3/FLAGe4b7b1f1f [2021-12-22 02:48:19,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa0af6590/82f66aeddbfc4f449fbd73c9aeb650c3 [2021-12-22 02:48:19,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:48:19,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:48:19,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:48:19,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:48:19,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:48:19,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:48:19" (1/1) ... [2021-12-22 02:48:19,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540876d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:19, skipping insertion in model container [2021-12-22 02:48:19,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:48:19" (1/1) ... [2021-12-22 02:48:19,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:48:19,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:48:20,166 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_OAT_test10-2.i[33022,33035] [2021-12-22 02:48:20,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:48:20,384 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 02:48:20,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40ba2122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:20, skipping insertion in model container [2021-12-22 02:48:20,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:48:20,385 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 02:48:20,387 INFO L158 Benchmark]: Toolchain (without parser) took 628.23ms. Allocated memory is still 113.2MB. Free memory was 80.7MB in the beginning and 71.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 02:48:20,396 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 47.4MB in the beginning and 47.4MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 02:48:20,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.91ms. Allocated memory is still 113.2MB. Free memory was 80.4MB in the beginning and 71.3MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 02:48:20,398 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 47.4MB in the beginning and 47.4MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.91ms. Allocated memory is still 113.2MB. Free memory was 80.4MB in the beginning and 71.3MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. 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_OAT_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 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:48:22,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:48:22,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:48:22,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:48:22,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:48:22,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:48:22,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:48:22,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:48:22,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:48:22,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:48:22,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:48:22,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:48:22,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:48:22,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:48:22,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:48:22,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:48:22,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:48:22,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:48:22,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:48:22,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:48:22,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:48:22,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:48:22,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:48:22,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:48:22,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:48:22,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:48:22,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:48:22,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:48:22,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:48:22,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:48:22,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:48:22,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:48:22,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:48:22,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:48:22,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:48:22,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:48:22,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:48:22,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:48:22,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:48:22,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:48:22,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:48:22,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 02:48:22,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:48:22,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:48:22,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:48:22,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:48:22,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:48:22,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:48:22,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:48:22,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:48:22,181 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:48:22,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:48:22,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 02:48:22,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:48:22,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:48:22,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 02:48:22,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:48:22,183 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:48:22,183 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:48:22,183 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:48:22,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:48:22,184 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:48:22,184 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 02:48:22,184 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 02:48:22,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 02:48:22,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:48:22,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:48:22,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:48:22,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:48:22,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:48:22,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:48:22,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:48:22,193 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 02:48:22,193 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 02:48:22,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:48:22,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 02:48:22,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-12-22 02:48:22,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:48:22,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:48:22,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:48:22,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:48:22,507 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:48:22,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-12-22 02:48:22,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25394b974/abf820d2ede04ab984b795c70e269cb7/FLAGb8dab4897 [2021-12-22 02:48:23,117 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:48:23,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-12-22 02:48:23,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25394b974/abf820d2ede04ab984b795c70e269cb7/FLAGb8dab4897 [2021-12-22 02:48:23,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25394b974/abf820d2ede04ab984b795c70e269cb7 [2021-12-22 02:48:23,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:48:23,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:48:23,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:48:23,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:48:23,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:48:23,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:48:23" (1/1) ... [2021-12-22 02:48:23,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11dc1add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:23, skipping insertion in model container [2021-12-22 02:48:23,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:48:23" (1/1) ... [2021-12-22 02:48:23,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:48:23,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:48:24,075 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_OAT_test10-2.i[33022,33035] [2021-12-22 02:48:24,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:48:24,325 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 02:48:24,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:48:24,365 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_OAT_test10-2.i[33022,33035] [2021-12-22 02:48:24,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:48:24,450 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 02:48:24,474 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_OAT_test10-2.i[33022,33035] [2021-12-22 02:48:24,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:48:24,613 INFO L208 MainTranslator]: Completed translation [2021-12-22 02:48:24,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24 WrapperNode [2021-12-22 02:48:24,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:48:24,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 02:48:24,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 02:48:24,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 02:48:24,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,729 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2348 [2021-12-22 02:48:24,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 02:48:24,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 02:48:24,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 02:48:24,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 02:48:24,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 02:48:24,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 02:48:24,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 02:48:24,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 02:48:24,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (1/1) ... [2021-12-22 02:48:24,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:48:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 02:48:24,940 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 02:48:24,952 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 02:48:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 02:48:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 02:48:24,973 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 02:48:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 02:48:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 02:48:24,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 02:48:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 02:48:24,975 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 02:48:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 02:48:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 02:48:24,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 02:48:24,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 02:48:25,290 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 02:48:25,291 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 02:48:25,294 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 02:48:31,928 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 02:48:31,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 02:48:31,947 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-12-22 02:48:31,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:48:31 BoogieIcfgContainer [2021-12-22 02:48:31,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 02:48:31,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 02:48:31,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 02:48:31,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 02:48:31,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:48:23" (1/3) ... [2021-12-22 02:48:31,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74259db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:48:31, skipping insertion in model container [2021-12-22 02:48:31,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:48:24" (2/3) ... [2021-12-22 02:48:31,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74259db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:48:31, skipping insertion in model container [2021-12-22 02:48:31,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:48:31" (3/3) ... [2021-12-22 02:48:31,957 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-2.i [2021-12-22 02:48:31,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 02:48:31,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1095 error locations. [2021-12-22 02:48:31,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 02:48:31,999 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 02:48:31,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1095 error locations. [2021-12-22 02:48:32,032 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 02:48:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:48:32,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:32,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:48:32,037 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 02:48:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-22 02:48:32,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:32,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317789053] [2021-12-22 02:48:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:32,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:32,059 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 02:48:32,092 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 02:48:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:48:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:32,364 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 02:48:32,370 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 02:48:32,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:32,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:32,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317789053] [2021-12-22 02:48:32,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317789053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:32,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:32,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:48:32,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859647292] [2021-12-22 02:48:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:32,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:32,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:32,403 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 02:48:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:35,462 INFO L93 Difference]: Finished difference Result 2934 states and 3120 transitions. [2021-12-22 02:48:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:35,468 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 02:48:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:35,493 INFO L225 Difference]: With dead ends: 2934 [2021-12-22 02:48:35,493 INFO L226 Difference]: Without dead ends: 2932 [2021-12-22 02:48:35,494 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 02:48:35,497 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 2142 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 02:48:35,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 1869 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 02:48:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-12-22 02:48:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2401. [2021-12-22 02:48:35,586 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 02:48:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2736 transitions. [2021-12-22 02:48:35,596 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2736 transitions. Word has length 3 [2021-12-22 02:48:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 2736 transitions. [2021-12-22 02:48:35,597 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 02:48:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2736 transitions. [2021-12-22 02:48:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:48:35,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:35,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:48:35,609 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 02:48:35,806 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 02:48:35,807 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 02:48:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-22 02:48:35,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771130538] [2021-12-22 02:48:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:35,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:35,810 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 02:48:35,812 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 02:48:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:48:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:35,994 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 02:48:36,002 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 02:48:36,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:36,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:36,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771130538] [2021-12-22 02:48:36,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771130538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:36,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:36,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:48:36,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312422216] [2021-12-22 02:48:36,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:36,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:36,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:36,006 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 02:48:40,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:40,224 INFO L93 Difference]: Finished difference Result 3371 states and 3798 transitions. [2021-12-22 02:48:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:40,225 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 02:48:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:40,235 INFO L225 Difference]: With dead ends: 3371 [2021-12-22 02:48:40,235 INFO L226 Difference]: Without dead ends: 3371 [2021-12-22 02:48:40,236 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 02:48:40,237 INFO L933 BasicCegarLoop]: 1951 mSDtfsCounter, 1054 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2021-12-22 02:48:40,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 3245 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-22 02:48:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-12-22 02:48:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2850. [2021-12-22 02:48:40,284 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 02:48:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3585 transitions. [2021-12-22 02:48:40,291 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3585 transitions. Word has length 3 [2021-12-22 02:48:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3585 transitions. [2021-12-22 02:48:40,292 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 02:48:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3585 transitions. [2021-12-22 02:48:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 02:48:40,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:40,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:48:40,300 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 02:48:40,499 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 02:48:40,500 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 02:48:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-22 02:48:40,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33019985] [2021-12-22 02:48:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:40,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:40,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:40,503 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 02:48:40,505 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 02:48:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 02:48:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:40,692 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 02:48:40,700 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 02:48:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:48:40,756 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 02:48:40,764 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:48:40,765 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 02:48:40,784 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 02:48:40,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:40,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33019985] [2021-12-22 02:48:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33019985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:40,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:40,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:48:40,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857903394] [2021-12-22 02:48:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:40,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:48:40,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:48:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:48:40,787 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 02:48:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:48,122 INFO L93 Difference]: Finished difference Result 5481 states and 6388 transitions. [2021-12-22 02:48:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:48:48,123 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 02:48:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:48,139 INFO L225 Difference]: With dead ends: 5481 [2021-12-22 02:48:48,139 INFO L226 Difference]: Without dead ends: 5481 [2021-12-22 02:48:48,140 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 02:48:48,141 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 2765 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s 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, 7.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:48:48,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2775 Valid, 2890 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-12-22 02:48:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-12-22 02:48:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3569. [2021-12-22 02:48:48,200 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 02:48:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 5124 transitions. [2021-12-22 02:48:48,211 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 5124 transitions. Word has length 7 [2021-12-22 02:48:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:48,212 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 5124 transitions. [2021-12-22 02:48:48,212 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 02:48:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 5124 transitions. [2021-12-22 02:48:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 02:48:48,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:48,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:48:48,226 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 02:48:48,422 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 02:48:48,422 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 02:48:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-22 02:48:48,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:48,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546246353] [2021-12-22 02:48:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:48,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:48,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:48,425 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 02:48:48,426 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 02:48:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:48:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:48,624 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 02:48:48,636 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 02:48:48,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:48,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546246353] [2021-12-22 02:48:48,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546246353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:48,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:48,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:48:48,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335201015] [2021-12-22 02:48:48,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:48,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:48,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:48,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:48,639 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 02:48:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:51,016 INFO L93 Difference]: Finished difference Result 4773 states and 6641 transitions. [2021-12-22 02:48:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:51,016 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 02:48:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:51,030 INFO L225 Difference]: With dead ends: 4773 [2021-12-22 02:48:51,030 INFO L226 Difference]: Without dead ends: 4773 [2021-12-22 02:48:51,031 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 02:48:51,031 INFO L933 BasicCegarLoop]: 2177 mSDtfsCounter, 1998 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:48:51,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2933 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 02:48:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-12-22 02:48:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 3478. [2021-12-22 02:48:51,088 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 02:48:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4911 transitions. [2021-12-22 02:48:51,096 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4911 transitions. Word has length 8 [2021-12-22 02:48:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:51,096 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 4911 transitions. [2021-12-22 02:48:51,097 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 02:48:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4911 transitions. [2021-12-22 02:48:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 02:48:51,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:51,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:48:51,109 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 02:48:51,309 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 02:48:51,309 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 02:48:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:51,309 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-22 02:48:51,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:51,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988766892] [2021-12-22 02:48:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:51,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:51,312 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 02:48:51,313 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 02:48:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:48:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:51,501 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 02:48:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:48:51,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:51,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988766892] [2021-12-22 02:48:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988766892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:51,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:48:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056485732] [2021-12-22 02:48:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:51,522 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 02:48:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:54,935 INFO L93 Difference]: Finished difference Result 5193 states and 7269 transitions. [2021-12-22 02:48:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:54,936 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 02:48:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:54,948 INFO L225 Difference]: With dead ends: 5193 [2021-12-22 02:48:54,948 INFO L226 Difference]: Without dead ends: 5193 [2021-12-22 02:48:54,948 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 02:48:54,949 INFO L933 BasicCegarLoop]: 2557 mSDtfsCounter, 1369 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:48:54,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3648 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 02:48:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-12-22 02:48:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3800. [2021-12-22 02:48:55,009 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 02:48:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5523 transitions. [2021-12-22 02:48:55,017 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5523 transitions. Word has length 8 [2021-12-22 02:48:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 5523 transitions. [2021-12-22 02:48:55,018 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 02:48:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5523 transitions. [2021-12-22 02:48:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 02:48:55,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:55,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:48:55,030 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 02:48:55,227 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 02:48:55,228 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 02:48:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-22 02:48:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685489344] [2021-12-22 02:48:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:55,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:55,230 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 02:48:55,232 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 02:48:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:48:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:55,397 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 02:48:55,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:55,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685489344] [2021-12-22 02:48:55,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685489344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:55,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:55,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:48:55,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626175295] [2021-12-22 02:48:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:55,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:55,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:55,400 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 02:48:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:55,434 INFO L93 Difference]: Finished difference Result 3740 states and 5437 transitions. [2021-12-22 02:48:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:55,434 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 02:48:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:55,446 INFO L225 Difference]: With dead ends: 3740 [2021-12-22 02:48:55,446 INFO L226 Difference]: Without dead ends: 3740 [2021-12-22 02:48:55,447 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 02:48:55,453 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 02:48:55,453 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 02:48:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-12-22 02:48:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3740. [2021-12-22 02:48:55,504 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 02:48:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 5437 transitions. [2021-12-22 02:48:55,511 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 5437 transitions. Word has length 11 [2021-12-22 02:48:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:55,512 INFO L470 AbstractCegarLoop]: Abstraction has 3740 states and 5437 transitions. [2021-12-22 02:48:55,512 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 02:48:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 5437 transitions. [2021-12-22 02:48:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 02:48:55,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:55,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:48:55,524 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 02:48:55,722 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 02:48:55,723 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 02:48:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-22 02:48:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:55,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502727215] [2021-12-22 02:48:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:55,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:55,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:55,727 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 02:48:55,729 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 02:48:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:48:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:55,954 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 02:48:55,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:55,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:55,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502727215] [2021-12-22 02:48:55,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502727215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:55,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:55,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:48:55,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988961486] [2021-12-22 02:48:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:55,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:48:55,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:48:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:48:55,959 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 02:48:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:56,038 INFO L93 Difference]: Finished difference Result 3712 states and 5381 transitions. [2021-12-22 02:48:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:48:56,039 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 02:48:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:56,063 INFO L225 Difference]: With dead ends: 3712 [2021-12-22 02:48:56,063 INFO L226 Difference]: Without dead ends: 3712 [2021-12-22 02:48:56,064 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 02:48:56,065 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 02:48:56,065 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 02:48:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-12-22 02:48:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3710. [2021-12-22 02:48:56,112 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 02:48:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5379 transitions. [2021-12-22 02:48:56,119 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5379 transitions. Word has length 13 [2021-12-22 02:48:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:56,119 INFO L470 AbstractCegarLoop]: Abstraction has 3710 states and 5379 transitions. [2021-12-22 02:48:56,119 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 02:48:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5379 transitions. [2021-12-22 02:48:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 02:48:56,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:56,121 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 02:48:56,130 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 02:48:56,330 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 02:48:56,330 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 02:48:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:56,331 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-22 02:48:56,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:56,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282987950] [2021-12-22 02:48:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:56,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:56,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:56,332 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 02:48:56,333 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 02:48:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:48:56,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:56,571 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 02:48:56,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:56,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282987950] [2021-12-22 02:48:56,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282987950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:56,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:56,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:48:56,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822603736] [2021-12-22 02:48:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:56,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:56,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:56,575 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 02:48:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:56,624 INFO L93 Difference]: Finished difference Result 5158 states and 6946 transitions. [2021-12-22 02:48:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:56,625 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 02:48:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:56,635 INFO L225 Difference]: With dead ends: 5158 [2021-12-22 02:48:56,635 INFO L226 Difference]: Without dead ends: 5158 [2021-12-22 02:48:56,635 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 02:48:56,636 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 02:48:56,636 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 02:48:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-12-22 02:48:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3650. [2021-12-22 02:48:56,701 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 02:48:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5293 transitions. [2021-12-22 02:48:56,708 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5293 transitions. Word has length 20 [2021-12-22 02:48:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:56,709 INFO L470 AbstractCegarLoop]: Abstraction has 3650 states and 5293 transitions. [2021-12-22 02:48:56,710 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 02:48:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5293 transitions. [2021-12-22 02:48:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 02:48:56,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:56,711 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 02:48:56,727 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 02:48:56,921 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 02:48:56,921 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 02:48:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-22 02:48:56,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:56,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209383310] [2021-12-22 02:48:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:56,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:56,923 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 02:48:56,924 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 02:48:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:48:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:57,134 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 02:48:57,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:57,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:57,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209383310] [2021-12-22 02:48:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209383310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:57,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:48:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113651479] [2021-12-22 02:48:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:48:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:48:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:48:57,137 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 02:48:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:57,175 INFO L93 Difference]: Finished difference Result 4991 states and 6655 transitions. [2021-12-22 02:48:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:48:57,176 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 02:48:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:57,184 INFO L225 Difference]: With dead ends: 4991 [2021-12-22 02:48:57,185 INFO L226 Difference]: Without dead ends: 4991 [2021-12-22 02:48:57,185 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 02:48:57,187 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 02:48:57,187 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 02:48:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-12-22 02:48:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3518. [2021-12-22 02:48:57,228 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 02:48:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 5035 transitions. [2021-12-22 02:48:57,234 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 5035 transitions. Word has length 20 [2021-12-22 02:48:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:57,235 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 5035 transitions. [2021-12-22 02:48:57,235 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 02:48:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 5035 transitions. [2021-12-22 02:48:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 02:48:57,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:57,237 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 02:48:57,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 02:48:57,446 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 02:48:57,447 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 02:48:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-22 02:48:57,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:57,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950939045] [2021-12-22 02:48:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:57,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:57,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:57,449 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 02:48:57,450 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 02:48:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:48:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:57,680 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 02:48:57,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:57,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:57,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950939045] [2021-12-22 02:48:57,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950939045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:57,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:57,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:48:57,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528125527] [2021-12-22 02:48:57,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:57,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:48:57,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:48:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:48:57,682 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 02:48:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:57,768 INFO L93 Difference]: Finished difference Result 4956 states and 6589 transitions. [2021-12-22 02:48:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:48:57,769 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 02:48:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:57,777 INFO L225 Difference]: With dead ends: 4956 [2021-12-22 02:48:57,777 INFO L226 Difference]: Without dead ends: 4956 [2021-12-22 02:48:57,777 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 02:48:57,778 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 02:48:57,778 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 02:48:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-12-22 02:48:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 3488. [2021-12-22 02:48:57,815 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 02:48:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4977 transitions. [2021-12-22 02:48:57,820 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4977 transitions. Word has length 22 [2021-12-22 02:48:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:57,820 INFO L470 AbstractCegarLoop]: Abstraction has 3488 states and 4977 transitions. [2021-12-22 02:48:57,820 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 02:48:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4977 transitions. [2021-12-22 02:48:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 02:48:57,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:57,821 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 02:48:57,831 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 02:48:58,031 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 02:48:58,031 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 02:48:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-22 02:48:58,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248397004] [2021-12-22 02:48:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:58,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:58,033 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 02:48:58,034 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 02:48:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:48:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:58,297 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 02:48:58,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:58,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248397004] [2021-12-22 02:48:58,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248397004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:58,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:58,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:48:58,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527911320] [2021-12-22 02:48:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:58,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:48:58,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:48:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:48:58,300 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 02:48:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:48:58,388 INFO L93 Difference]: Finished difference Result 4883 states and 6400 transitions. [2021-12-22 02:48:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:48:58,389 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 02:48:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:48:58,396 INFO L225 Difference]: With dead ends: 4883 [2021-12-22 02:48:58,397 INFO L226 Difference]: Without dead ends: 4883 [2021-12-22 02:48:58,397 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 02:48:58,398 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 02:48:58,398 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 02:48:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-12-22 02:48:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 3426. [2021-12-22 02:48:58,438 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 02:48:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4803 transitions. [2021-12-22 02:48:58,444 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4803 transitions. Word has length 22 [2021-12-22 02:48:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:48:58,445 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4803 transitions. [2021-12-22 02:48:58,445 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 02:48:58,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4803 transitions. [2021-12-22 02:48:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 02:48:58,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:48:58,448 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 02:48:58,458 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 02:48:58,657 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 02:48:58,658 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 02:48:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:48:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-22 02:48:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:48:58,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949405202] [2021-12-22 02:48:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:48:58,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:48:58,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:48:58,660 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 02:48:58,660 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 02:48:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:48:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:48:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:48:58,876 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 02:48:58,940 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 02:48:58,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:48:58,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:48:58,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949405202] [2021-12-22 02:48:58,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949405202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:48:58,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:48:58,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:48:58,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273616194] [2021-12-22 02:48:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:48:58,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:48:58,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:48:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:48:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:48:58,943 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 02:49:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:49:01,587 INFO L93 Difference]: Finished difference Result 3878 states and 5162 transitions. [2021-12-22 02:49:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:49:01,588 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 02:49:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:49:01,594 INFO L225 Difference]: With dead ends: 3878 [2021-12-22 02:49:01,594 INFO L226 Difference]: Without dead ends: 3878 [2021-12-22 02:49:01,594 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 02:49:01,595 INFO L933 BasicCegarLoop]: 1244 mSDtfsCounter, 2745 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 02:49:01,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2751 Valid, 2342 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 02:49:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-12-22 02:49:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3422. [2021-12-22 02:49:01,632 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 02:49:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4795 transitions. [2021-12-22 02:49:01,637 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4795 transitions. Word has length 27 [2021-12-22 02:49:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:49:01,638 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4795 transitions. [2021-12-22 02:49:01,638 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 02:49:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4795 transitions. [2021-12-22 02:49:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 02:49:01,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:49:01,641 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 02:49:01,651 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 02:49:01,850 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 02:49:01,851 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 02:49:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:49:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-22 02:49:01,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:49:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145329380] [2021-12-22 02:49:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:49:01,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:49:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:49:01,853 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 02:49:01,855 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 02:49:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:49:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:49:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:49:02,035 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 02:49:02,184 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 02:49:02,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:49:02,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:49:02,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145329380] [2021-12-22 02:49:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145329380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:49:02,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:49:02,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:49:02,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007038297] [2021-12-22 02:49:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:49:02,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:49:02,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:49:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:49:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:49:02,185 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 02:49:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:49:06,050 INFO L93 Difference]: Finished difference Result 4323 states and 5779 transitions. [2021-12-22 02:49:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:49:06,052 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 02:49:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:49:06,059 INFO L225 Difference]: With dead ends: 4323 [2021-12-22 02:49:06,059 INFO L226 Difference]: Without dead ends: 4323 [2021-12-22 02:49:06,059 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 02:49:06,060 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1907 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.8s IncrementalHoareTripleChecker+Time [2021-12-22 02:49:06,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 3817 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-22 02:49:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-12-22 02:49:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 3458. [2021-12-22 02:49:06,141 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 02:49:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4836 transitions. [2021-12-22 02:49:06,177 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4836 transitions. Word has length 27 [2021-12-22 02:49:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:49:06,178 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 4836 transitions. [2021-12-22 02:49:06,178 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 02:49:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4836 transitions. [2021-12-22 02:49:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:49:06,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:49:06,179 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 02:49:06,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 02:49:06,379 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 02:49:06,379 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 02:49:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:49:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-22 02:49:06,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:49:06,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803602748] [2021-12-22 02:49:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:49:06,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:49:06,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:49:06,382 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 02:49:06,384 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 02:49:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:49:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:49:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:49:06,616 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 02:49:06,683 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 02:49:06,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:49:06,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:49:06,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803602748] [2021-12-22 02:49:06,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803602748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:49:06,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:49:06,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:49:06,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469523724] [2021-12-22 02:49:06,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:49:06,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:49:06,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:49:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:49:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:49:06,686 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 02:49:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:49:10,554 INFO L93 Difference]: Finished difference Result 6686 states and 9193 transitions. [2021-12-22 02:49:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:49:10,554 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 02:49:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:49:10,563 INFO L225 Difference]: With dead ends: 6686 [2021-12-22 02:49:10,564 INFO L226 Difference]: Without dead ends: 6686 [2021-12-22 02:49:10,564 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 02:49:10,565 INFO L933 BasicCegarLoop]: 2703 mSDtfsCounter, 3693 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s 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, 3.8s IncrementalHoareTripleChecker+Time [2021-12-22 02:49:10,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3700 Valid, 4839 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-22 02:49:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6686 states. [2021-12-22 02:49:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6686 to 3454. [2021-12-22 02:49:10,605 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 02:49:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4828 transitions. [2021-12-22 02:49:10,610 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4828 transitions. Word has length 36 [2021-12-22 02:49:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:49:10,611 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 4828 transitions. [2021-12-22 02:49:10,611 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 02:49:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4828 transitions. [2021-12-22 02:49:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:49:10,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:49:10,612 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 02:49:10,628 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 02:49:10,822 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 02:49:10,823 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 02:49:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:49:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-12-22 02:49:10,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:49:10,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896029517] [2021-12-22 02:49:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:49:10,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:49:10,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:49:10,826 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 02:49:10,828 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 02:49:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:49:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:49:11,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:49:11,037 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 02:49:11,229 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 02:49:11,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:49:11,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:49:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896029517] [2021-12-22 02:49:11,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896029517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:49:11,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:49:11,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:49:11,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400981588] [2021-12-22 02:49:11,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:49:11,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:49:11,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:49:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:49:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:49:11,232 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) [2021-12-22 02:49:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:49:16,436 INFO L93 Difference]: Finished difference Result 6369 states and 8585 transitions. [2021-12-22 02:49:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:49:16,437 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 02:49:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:49:16,465 INFO L225 Difference]: With dead ends: 6369 [2021-12-22 02:49:16,465 INFO L226 Difference]: Without dead ends: 6369 [2021-12-22 02:49:16,470 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 02:49:16,471 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 3063 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-22 02:49:16,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3067 Valid, 5267 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-22 02:49:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2021-12-22 02:49:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 3450. [2021-12-22 02:49:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2592 states have (on average 1.8402777777777777) internal successors, (4770), 3425 states have internal predecessors, (4770), 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 02:49:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4820 transitions. [2021-12-22 02:49:16,514 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4820 transitions. Word has length 36 [2021-12-22 02:49:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:49:16,515 INFO L470 AbstractCegarLoop]: Abstraction has 3450 states and 4820 transitions. [2021-12-22 02:49:16,515 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 02:49:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4820 transitions. [2021-12-22 02:49:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:49:16,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:49:16,516 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 02:49:16,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 02:49:16,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:49:16,727 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1091 more)] === [2021-12-22 02:49:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:49:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-12-22 02:49:16,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:49:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42158685] [2021-12-22 02:49:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:49:16,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:49:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:49:16,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:49:16,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 02:49:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:49:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:49:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:49:16,985 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 02:49:17,064 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 02:49:17,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:49:17,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:49:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42158685] [2021-12-22 02:49:17,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42158685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:49:17,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:49:17,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:49:17,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638184209] [2021-12-22 02:49:17,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:49:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:49:17,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:49:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:49:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:49:17,067 INFO L87 Difference]: Start difference. First operand 3450 states and 4820 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)