./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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_SAX_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 08:36:06,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 08:36:06,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 08:36:06,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 08:36:06,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 08:36:06,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 08:36:06,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 08:36:06,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 08:36:06,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 08:36:06,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 08:36:06,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 08:36:06,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 08:36:06,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 08:36:06,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 08:36:06,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 08:36:06,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 08:36:06,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 08:36:06,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 08:36:06,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 08:36:06,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 08:36:06,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 08:36:06,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 08:36:06,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 08:36:06,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 08:36:06,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 08:36:06,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 08:36:06,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 08:36:06,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 08:36:06,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 08:36:06,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 08:36:06,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 08:36:06,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 08:36:06,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 08:36:06,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 08:36:06,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 08:36:06,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 08:36:06,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 08:36:06,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 08:36:06,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 08:36:06,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 08:36:06,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 08:36:06,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 08:36:06,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 08:36:06,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 08:36:06,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 08:36:06,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 08:36:06,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 08:36:06,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 08:36:06,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 08:36:06,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 08:36:06,733 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 08:36:06,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 08:36:06,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 08:36:06,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 08:36:06,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 08:36:06,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 08:36:06,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 08:36:06,735 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 08:36:06,735 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 08:36:06,735 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 08:36:06,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 08:36:06,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 08:36:06,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 08:36:06,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 08:36:06,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 08:36:06,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 08:36:06,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 08:36:06,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 08:36:06,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 08:36:06,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 08:36:06,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 08:36:06,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 08:36:06,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 [2021-12-28 08:36:07,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 08:36:07,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 08:36:07,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 08:36:07,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 08:36:07,075 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 08:36:07,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2021-12-28 08:36:07,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd88d803/e7ee4d4573c241a59818ac264fcb712a/FLAGeb706132e [2021-12-28 08:36:07,713 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 08:36:07,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2021-12-28 08:36:07,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd88d803/e7ee4d4573c241a59818ac264fcb712a/FLAGeb706132e [2021-12-28 08:36:07,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd88d803/e7ee4d4573c241a59818ac264fcb712a [2021-12-28 08:36:07,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 08:36:07,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 08:36:07,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 08:36:07,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 08:36:07,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 08:36:07,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 08:36:07" (1/1) ... [2021-12-28 08:36:07,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714d54e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:07, skipping insertion in model container [2021-12-28 08:36:07,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 08:36:07" (1/1) ... [2021-12-28 08:36:07,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 08:36:08,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 08:36:08,444 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_SAX_test10-1.i[33022,33035] [2021-12-28 08:36:08,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 08:36:08,714 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) [2021-12-28 08:36:08,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a3703d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:08, skipping insertion in model container [2021-12-28 08:36:08,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 08:36:08,716 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-28 08:36:08,717 INFO L158 Benchmark]: Toolchain (without parser) took 749.73ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 34.2MB in the beginning and 44.2MB in the end (delta: -10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 08:36:08,718 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 08:36:08,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 747.83ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 34.0MB in the beginning and 44.2MB in the end (delta: -10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 08:36:08,720 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 58.7MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 747.83ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 34.0MB in the beginning and 44.2MB in the end (delta: -10.2MB). 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_SAX_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 08:36:10,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 08:36:10,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 08:36:10,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 08:36:10,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 08:36:10,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 08:36:10,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 08:36:10,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 08:36:10,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 08:36:10,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 08:36:10,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 08:36:10,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 08:36:10,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 08:36:10,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 08:36:10,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 08:36:10,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 08:36:10,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 08:36:10,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 08:36:10,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 08:36:10,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 08:36:10,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 08:36:10,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 08:36:10,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 08:36:10,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 08:36:10,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 08:36:10,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 08:36:10,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 08:36:10,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 08:36:10,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 08:36:10,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 08:36:10,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 08:36:10,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 08:36:10,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 08:36:10,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 08:36:10,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 08:36:10,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 08:36:10,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 08:36:10,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 08:36:10,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 08:36:10,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 08:36:10,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 08:36:10,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-28 08:36:10,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 08:36:10,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 08:36:10,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 08:36:10,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 08:36:10,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 08:36:10,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 08:36:10,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 08:36:10,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 08:36:10,507 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 08:36:10,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 08:36:10,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 08:36:10,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 08:36:10,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 08:36:10,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 08:36:10,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 08:36:10,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 08:36:10,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 08:36:10,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 08:36:10,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 08:36:10,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 08:36:10,516 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 08:36:10,517 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 08:36:10,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 08:36:10,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c32e831c11e67575bf9fc4420a056c0795572e7218bcd99a0067a1a2caea6f7 [2021-12-28 08:36:10,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 08:36:10,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 08:36:10,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 08:36:10,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 08:36:10,885 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 08:36:10,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2021-12-28 08:36:10,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fe2d17c/f2a1390d18c64afab0eee22a194092fb/FLAGd6f9f76f5 [2021-12-28 08:36:11,538 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 08:36:11,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-1.i [2021-12-28 08:36:11,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fe2d17c/f2a1390d18c64afab0eee22a194092fb/FLAGd6f9f76f5 [2021-12-28 08:36:11,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64fe2d17c/f2a1390d18c64afab0eee22a194092fb [2021-12-28 08:36:11,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 08:36:11,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 08:36:11,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 08:36:11,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 08:36:11,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 08:36:11,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 08:36:11" (1/1) ... [2021-12-28 08:36:11,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3208676a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:11, skipping insertion in model container [2021-12-28 08:36:11,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 08:36:11" (1/1) ... [2021-12-28 08:36:11,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 08:36:12,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 08:36:12,553 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_SAX_test10-1.i[33022,33035] [2021-12-28 08:36:12,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 08:36:12,764 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-28 08:36:12,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 08:36:12,801 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_SAX_test10-1.i[33022,33035] [2021-12-28 08:36:12,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 08:36:12,901 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 08:36:12,934 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_SAX_test10-1.i[33022,33035] [2021-12-28 08:36:13,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 08:36:13,074 INFO L208 MainTranslator]: Completed translation [2021-12-28 08:36:13,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13 WrapperNode [2021-12-28 08:36:13,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 08:36:13,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 08:36:13,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 08:36:13,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 08:36:13,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,254 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2021-12-28 08:36:13,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 08:36:13,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 08:36:13,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 08:36:13,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 08:36:13,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 08:36:13,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 08:36:13,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 08:36:13,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 08:36:13,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (1/1) ... [2021-12-28 08:36:13,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 08:36:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 08:36:13,445 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) [2021-12-28 08:36:13,450 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 [2021-12-28 08:36:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-28 08:36:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-28 08:36:13,486 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-28 08:36:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-28 08:36:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 08:36:13,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 08:36:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 08:36:13,487 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 08:36:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 08:36:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 08:36:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 08:36:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 08:36:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 08:36:13,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 08:36:13,718 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 08:36:13,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 08:36:13,723 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-28 08:36:20,853 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 08:36:20,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 08:36:20,869 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2021-12-28 08:36:20,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 08:36:20 BoogieIcfgContainer [2021-12-28 08:36:20,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 08:36:20,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 08:36:20,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 08:36:20,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 08:36:20,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 08:36:11" (1/3) ... [2021-12-28 08:36:20,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cec712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 08:36:20, skipping insertion in model container [2021-12-28 08:36:20,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 08:36:13" (2/3) ... [2021-12-28 08:36:20,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cec712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 08:36:20, skipping insertion in model container [2021-12-28 08:36:20,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 08:36:20" (3/3) ... [2021-12-28 08:36:20,879 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-1.i [2021-12-28 08:36:20,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 08:36:20,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2021-12-28 08:36:20,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 08:36:20,924 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 [2021-12-28 08:36:20,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2021-12-28 08:36:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 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) [2021-12-28 08:36:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-28 08:36:20,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:20,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-28 08:36:20,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-28 08:36:20,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:20,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188617940] [2021-12-28 08:36:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:20,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:20,995 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) [2021-12-28 08:36:21,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 08:36:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 08:36:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:21,350 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 [2021-12-28 08:36:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:21,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:21,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188617940] [2021-12-28 08:36:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188617940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:21,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 08:36:21,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572789034] [2021-12-28 08:36:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:21,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:21,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:21,413 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 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) [2021-12-28 08:36:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:24,532 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2021-12-28 08:36:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:24,535 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 [2021-12-28 08:36:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:24,563 INFO L225 Difference]: With dead ends: 2558 [2021-12-28 08:36:24,563 INFO L226 Difference]: Without dead ends: 2556 [2021-12-28 08:36:24,565 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 [2021-12-28 08:36:24,570 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:24,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-28 08:36:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-12-28 08:36:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2021-12-28 08:36:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 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) [2021-12-28 08:36:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2021-12-28 08:36:24,706 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2021-12-28 08:36:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:24,707 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2021-12-28 08:36:24,707 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) [2021-12-28 08:36:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2021-12-28 08:36:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-28 08:36:24,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:24,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-28 08:36:24,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-28 08:36:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:24,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-28 08:36:24,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:24,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704828560] [2021-12-28 08:36:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:24,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:24,924 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) [2021-12-28 08:36:24,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 08:36:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 08:36:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:25,116 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 [2021-12-28 08:36:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:25,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:25,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704828560] [2021-12-28 08:36:25,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704828560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:25,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 08:36:25,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397355091] [2021-12-28 08:36:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:25,144 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 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) [2021-12-28 08:36:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:29,228 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2021-12-28 08:36:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:29,229 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 [2021-12-28 08:36:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:29,255 INFO L225 Difference]: With dead ends: 2973 [2021-12-28 08:36:29,255 INFO L226 Difference]: Without dead ends: 2973 [2021-12-28 08:36:29,256 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 [2021-12-28 08:36:29,257 INFO L933 BasicCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:29,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-28 08:36:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-12-28 08:36:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2021-12-28 08:36:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 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) [2021-12-28 08:36:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2021-12-28 08:36:29,315 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2021-12-28 08:36:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:29,316 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2021-12-28 08:36:29,316 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) [2021-12-28 08:36:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2021-12-28 08:36:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 08:36:29,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:29,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 08:36:29,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:29,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:29,519 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-28 08:36:29,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:29,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462177868] [2021-12-28 08:36:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:29,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:29,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:29,525 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) [2021-12-28 08:36:29,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 08:36:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 08:36:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:29,730 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 [2021-12-28 08:36:29,737 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 [2021-12-28 08:36:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 08:36:29,816 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 [2021-12-28 08:36:29,826 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 08:36:29,827 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 [2021-12-28 08:36:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:29,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:29,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462177868] [2021-12-28 08:36:29,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462177868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:29,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:29,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:29,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791361494] [2021-12-28 08:36:29,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:29,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:29,866 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 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) [2021-12-28 08:36:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:36,521 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2021-12-28 08:36:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:36:36,522 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 [2021-12-28 08:36:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:36,542 INFO L225 Difference]: With dead ends: 4906 [2021-12-28 08:36:36,542 INFO L226 Difference]: Without dead ends: 4906 [2021-12-28 08:36:36,542 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 [2021-12-28 08:36:36,545 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:36,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-28 08:36:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-12-28 08:36:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2021-12-28 08:36:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 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) [2021-12-28 08:36:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2021-12-28 08:36:36,649 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2021-12-28 08:36:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:36,649 INFO L470 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2021-12-28 08:36:36,650 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) [2021-12-28 08:36:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2021-12-28 08:36:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 08:36:36,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:36,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 08:36:36,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:36,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:36,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-28 08:36:36,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:36,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145308101] [2021-12-28 08:36:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:36,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:36,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 08:36:36,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 08:36:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 08:36:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:37,058 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 [2021-12-28 08:36:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:37,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:37,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145308101] [2021-12-28 08:36:37,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145308101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:37,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 08:36:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446450032] [2021-12-28 08:36:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:37,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:37,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:37,070 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 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) [2021-12-28 08:36:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:39,994 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2021-12-28 08:36:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:39,994 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 [2021-12-28 08:36:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:40,012 INFO L225 Difference]: With dead ends: 4574 [2021-12-28 08:36:40,012 INFO L226 Difference]: Without dead ends: 4574 [2021-12-28 08:36:40,013 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 [2021-12-28 08:36:40,013 INFO L933 BasicCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:40,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-28 08:36:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2021-12-28 08:36:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2021-12-28 08:36:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 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) [2021-12-28 08:36:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2021-12-28 08:36:40,085 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2021-12-28 08:36:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2021-12-28 08:36:40,085 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) [2021-12-28 08:36:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2021-12-28 08:36:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 08:36:40,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:40,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 08:36:40,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:40,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-28 08:36:40,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372291511] [2021-12-28 08:36:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:40,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:40,299 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) [2021-12-28 08:36:40,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 08:36:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 08:36:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:40,469 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 [2021-12-28 08:36:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:40,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:40,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372291511] [2021-12-28 08:36:40,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372291511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:40,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:40,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 08:36:40,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144250981] [2021-12-28 08:36:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:40,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:40,498 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 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) [2021-12-28 08:36:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:44,433 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2021-12-28 08:36:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:44,434 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 [2021-12-28 08:36:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:44,450 INFO L225 Difference]: With dead ends: 4996 [2021-12-28 08:36:44,450 INFO L226 Difference]: Without dead ends: 4996 [2021-12-28 08:36:44,450 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 [2021-12-28 08:36:44,451 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:44,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-28 08:36:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-12-28 08:36:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2021-12-28 08:36:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 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) [2021-12-28 08:36:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2021-12-28 08:36:44,528 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2021-12-28 08:36:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2021-12-28 08:36:44,528 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) [2021-12-28 08:36:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2021-12-28 08:36:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 08:36:44,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:44,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 08:36:44,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:44,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:44,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-28 08:36:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222554733] [2021-12-28 08:36:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:44,741 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) [2021-12-28 08:36:44,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-28 08:36:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 08:36:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:44,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:44,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222554733] [2021-12-28 08:36:44,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222554733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:44,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:44,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:44,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383439248] [2021-12-28 08:36:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:44,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:44,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:44,934 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 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) [2021-12-28 08:36:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:44,975 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2021-12-28 08:36:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:44,976 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 [2021-12-28 08:36:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:44,993 INFO L225 Difference]: With dead ends: 3541 [2021-12-28 08:36:44,994 INFO L226 Difference]: Without dead ends: 3541 [2021-12-28 08:36:44,994 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 [2021-12-28 08:36:44,995 INFO L933 BasicCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 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 [2021-12-28 08:36:44,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 08:36:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-12-28 08:36:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2021-12-28 08:36:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 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) [2021-12-28 08:36:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2021-12-28 08:36:45,063 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2021-12-28 08:36:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:45,064 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2021-12-28 08:36:45,064 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) [2021-12-28 08:36:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2021-12-28 08:36:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 08:36:45,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:45,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 08:36:45,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:45,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-28 08:36:45,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190023036] [2021-12-28 08:36:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:45,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:45,278 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) [2021-12-28 08:36:45,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-28 08:36:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 08:36:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:45,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:45,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190023036] [2021-12-28 08:36:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190023036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:45,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:45,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 08:36:45,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027752403] [2021-12-28 08:36:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:45,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:45,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:45,485 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 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) [2021-12-28 08:36:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:45,582 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2021-12-28 08:36:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:36:45,582 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 [2021-12-28 08:36:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:45,599 INFO L225 Difference]: With dead ends: 3513 [2021-12-28 08:36:45,600 INFO L226 Difference]: Without dead ends: 3513 [2021-12-28 08:36:45,600 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 [2021-12-28 08:36:45,601 INFO L933 BasicCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:45,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 08:36:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-12-28 08:36:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2021-12-28 08:36:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 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) [2021-12-28 08:36:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2021-12-28 08:36:45,656 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2021-12-28 08:36:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:45,656 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2021-12-28 08:36:45,657 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) [2021-12-28 08:36:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2021-12-28 08:36:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 08:36:45,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:45,658 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] [2021-12-28 08:36:45,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:45,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:45,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-28 08:36:45,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:45,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757564263] [2021-12-28 08:36:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:45,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:45,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:45,870 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) [2021-12-28 08:36:45,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-28 08:36:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:46,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 08:36:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:46,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:46,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757564263] [2021-12-28 08:36:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757564263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:46,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:46,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:46,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087407649] [2021-12-28 08:36:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:46,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:46,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:46,102 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 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) [2021-12-28 08:36:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:46,164 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2021-12-28 08:36:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:46,165 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 [2021-12-28 08:36:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:46,178 INFO L225 Difference]: With dead ends: 4760 [2021-12-28 08:36:46,179 INFO L226 Difference]: Without dead ends: 4760 [2021-12-28 08:36:46,179 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 [2021-12-28 08:36:46,180 INFO L933 BasicCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 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 [2021-12-28 08:36:46,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 08:36:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2021-12-28 08:36:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2021-12-28 08:36:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 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) [2021-12-28 08:36:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2021-12-28 08:36:46,259 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2021-12-28 08:36:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:46,260 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2021-12-28 08:36:46,261 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) [2021-12-28 08:36:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2021-12-28 08:36:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 08:36:46,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:46,262 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] [2021-12-28 08:36:46,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:46,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:46,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-28 08:36:46,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:46,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093625409] [2021-12-28 08:36:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:46,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:46,475 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) [2021-12-28 08:36:46,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-28 08:36:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 08:36:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:46,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:46,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093625409] [2021-12-28 08:36:46,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093625409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:46,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:46,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:46,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91030199] [2021-12-28 08:36:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:46,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 08:36:46,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 08:36:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 08:36:46,688 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 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) [2021-12-28 08:36:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:46,737 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2021-12-28 08:36:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 08:36:46,738 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 [2021-12-28 08:36:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:46,749 INFO L225 Difference]: With dead ends: 4593 [2021-12-28 08:36:46,749 INFO L226 Difference]: Without dead ends: 4593 [2021-12-28 08:36:46,750 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 [2021-12-28 08:36:46,752 INFO L933 BasicCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 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 [2021-12-28 08:36:46,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 08:36:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-12-28 08:36:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2021-12-28 08:36:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 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) [2021-12-28 08:36:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2021-12-28 08:36:46,810 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2021-12-28 08:36:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:46,811 INFO L470 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2021-12-28 08:36:46,811 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) [2021-12-28 08:36:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2021-12-28 08:36:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 08:36:46,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:46,813 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] [2021-12-28 08:36:46,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:47,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:47,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-28 08:36:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119535540] [2021-12-28 08:36:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:47,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:47,028 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) [2021-12-28 08:36:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-28 08:36:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 08:36:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:47,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:47,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119535540] [2021-12-28 08:36:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119535540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:47,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:47,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 08:36:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966769401] [2021-12-28 08:36:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:47,264 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 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) [2021-12-28 08:36:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:47,368 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2021-12-28 08:36:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:36:47,369 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 [2021-12-28 08:36:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:47,378 INFO L225 Difference]: With dead ends: 4558 [2021-12-28 08:36:47,378 INFO L226 Difference]: Without dead ends: 4558 [2021-12-28 08:36:47,379 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 [2021-12-28 08:36:47,379 INFO L933 BasicCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 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 [2021-12-28 08:36:47,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 08:36:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-28 08:36:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2021-12-28 08:36:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 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) [2021-12-28 08:36:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2021-12-28 08:36:47,443 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2021-12-28 08:36:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:47,444 INFO L470 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2021-12-28 08:36:47,444 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) [2021-12-28 08:36:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2021-12-28 08:36:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 08:36:47,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:47,448 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] [2021-12-28 08:36:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:47,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:47,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-28 08:36:47,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500071613] [2021-12-28 08:36:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:47,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:47,661 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) [2021-12-28 08:36:47,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-28 08:36:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 08:36:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:47,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:47,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:47,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500071613] [2021-12-28 08:36:47,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500071613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:47,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:47,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 08:36:47,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571416730] [2021-12-28 08:36:47,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:47,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:47,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:47,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:47,890 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 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) [2021-12-28 08:36:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:47,980 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2021-12-28 08:36:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:36:47,980 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 [2021-12-28 08:36:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:47,989 INFO L225 Difference]: With dead ends: 4485 [2021-12-28 08:36:47,989 INFO L226 Difference]: Without dead ends: 4485 [2021-12-28 08:36:47,990 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 [2021-12-28 08:36:47,990 INFO L933 BasicCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 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 [2021-12-28 08:36:47,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 08:36:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-12-28 08:36:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2021-12-28 08:36:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 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) [2021-12-28 08:36:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2021-12-28 08:36:48,038 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2021-12-28 08:36:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:48,039 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2021-12-28 08:36:48,039 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) [2021-12-28 08:36:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2021-12-28 08:36:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 08:36:48,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:48,040 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] [2021-12-28 08:36:48,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:48,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:48,250 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-28 08:36:48,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:48,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279991415] [2021-12-28 08:36:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:48,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:48,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:48,252 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) [2021-12-28 08:36:48,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-28 08:36:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 08:36:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:48,413 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 [2021-12-28 08:36:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:48,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:48,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279991415] [2021-12-28 08:36:48,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279991415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:48,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:48,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:48,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023979573] [2021-12-28 08:36:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:48,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:48,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:48,484 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 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) [2021-12-28 08:36:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:51,072 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2021-12-28 08:36:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:36:51,073 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 [2021-12-28 08:36:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:51,084 INFO L225 Difference]: With dead ends: 3502 [2021-12-28 08:36:51,084 INFO L226 Difference]: Without dead ends: 3502 [2021-12-28 08:36:51,085 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 [2021-12-28 08:36:51,086 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:51,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 08:36:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-12-28 08:36:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2021-12-28 08:36:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 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) [2021-12-28 08:36:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2021-12-28 08:36:51,135 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2021-12-28 08:36:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:51,135 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2021-12-28 08:36:51,135 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) [2021-12-28 08:36:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2021-12-28 08:36:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 08:36:51,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:51,136 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] [2021-12-28 08:36:51,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-28 08:36:51,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:51,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-28 08:36:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245821199] [2021-12-28 08:36:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:51,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:51,349 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) [2021-12-28 08:36:51,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-28 08:36:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 08:36:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:51,685 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 [2021-12-28 08:36:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:51,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:51,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:51,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245821199] [2021-12-28 08:36:51,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245821199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:51,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:51,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:51,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450036285] [2021-12-28 08:36:51,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:51,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:51,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:51,858 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 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) [2021-12-28 08:36:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:36:55,941 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2021-12-28 08:36:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 08:36:55,942 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 [2021-12-28 08:36:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:36:55,948 INFO L225 Difference]: With dead ends: 3925 [2021-12-28 08:36:55,949 INFO L226 Difference]: Without dead ends: 3925 [2021-12-28 08:36:55,949 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 [2021-12-28 08:36:55,950 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-28 08:36:55,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-28 08:36:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-12-28 08:36:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2021-12-28 08:36:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 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) [2021-12-28 08:36:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2021-12-28 08:36:55,991 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2021-12-28 08:36:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:36:55,992 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2021-12-28 08:36:55,992 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) [2021-12-28 08:36:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2021-12-28 08:36:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 08:36:55,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:36:55,993 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] [2021-12-28 08:36:56,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-28 08:36:56,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:36:56,202 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:36:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:36:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-28 08:36:56,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:36:56,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814588009] [2021-12-28 08:36:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:36:56,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:36:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:36:56,205 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) [2021-12-28 08:36:56,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-28 08:36:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:36:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 08:36:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:36:56,439 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 [2021-12-28 08:36:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:36:56,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:36:56,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:36:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814588009] [2021-12-28 08:36:56,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814588009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:36:56,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:36:56,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:36:56,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660537664] [2021-12-28 08:36:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:36:56,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:36:56,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:36:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:36:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:36:56,510 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 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) [2021-12-28 08:37:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 08:37:00,747 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2021-12-28 08:37:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 08:37:00,748 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 [2021-12-28 08:37:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 08:37:00,757 INFO L225 Difference]: With dead ends: 6304 [2021-12-28 08:37:00,758 INFO L226 Difference]: Without dead ends: 6304 [2021-12-28 08:37:00,758 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 [2021-12-28 08:37:00,758 INFO L933 BasicCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-28 08:37:00,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-28 08:37:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-12-28 08:37:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2021-12-28 08:37:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 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) [2021-12-28 08:37:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2021-12-28 08:37:00,813 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2021-12-28 08:37:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 08:37:00,813 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2021-12-28 08:37:00,813 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) [2021-12-28 08:37:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2021-12-28 08:37:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 08:37:00,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 08:37:00,814 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] [2021-12-28 08:37:00,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-28 08:37:01,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 08:37:01,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-28 08:37:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 08:37:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-12-28 08:37:01,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 08:37:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89978479] [2021-12-28 08:37:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 08:37:01,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 08:37:01,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 08:37:01,026 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) [2021-12-28 08:37:01,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-28 08:37:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 08:37:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 08:37:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 08:37:01,247 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 [2021-12-28 08:37:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 08:37:01,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 08:37:01,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 08:37:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89978479] [2021-12-28 08:37:01,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89978479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 08:37:01,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 08:37:01,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 08:37:01,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143238008] [2021-12-28 08:37:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 08:37:01,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 08:37:01,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 08:37:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 08:37:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 08:37:01,445 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 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)