./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/basename-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/basename-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:44:50,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:44:50,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:44:50,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:44:50,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:44:50,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:44:50,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:44:50,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:44:50,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:44:50,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:44:50,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:44:50,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:44:50,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:44:50,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:44:50,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:44:50,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:44:50,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:44:50,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:44:50,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:44:50,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:44:50,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:44:50,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:44:50,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:44:50,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:44:50,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:44:50,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:44:50,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:44:50,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:44:50,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:44:50,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:44:50,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:44:50,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:44:50,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:44:50,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:44:50,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:44:50,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:44:50,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:44:50,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:44:50,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:44:50,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:44:50,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:44:50,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-16 08:44:50,806 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:44:50,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:44:50,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:44:50,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:44:50,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:44:50,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:44:50,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:44:50,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:44:50,813 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:44:50,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:44:50,814 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:44:50,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:44:50,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:44:50,814 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:44:50,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:44:50,815 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:44:50,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:44:50,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:44:50,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:44:50,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:44:50,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:44:50,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:44:50,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:44:50,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 [2021-12-16 08:44:51,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:44:51,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:44:51,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:44:51,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:44:51,038 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:44:51,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-16 08:44:51,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff8abe89/69e8ddc1ec274bb89d950364044dd713/FLAG7d6cebe20 [2021-12-16 08:44:51,535 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:44:51,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-16 08:44:51,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff8abe89/69e8ddc1ec274bb89d950364044dd713/FLAG7d6cebe20 [2021-12-16 08:44:51,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff8abe89/69e8ddc1ec274bb89d950364044dd713 [2021-12-16 08:44:51,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:44:51,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:44:51,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:44:51,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:44:51,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:44:51,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:44:51" (1/1) ... [2021-12-16 08:44:51,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ed0444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:51, skipping insertion in model container [2021-12-16 08:44:51,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:44:51" (1/1) ... [2021-12-16 08:44:51,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:44:51,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:44:51,911 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/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-16 08:44:51,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:44:51,960 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-16 08:44:51,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d7496b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:51, skipping insertion in model container [2021-12-16 08:44:51,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:44:51,964 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:44:51,969 INFO L158 Benchmark]: Toolchain (without parser) took 395.92ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 80.7MB in the end (delta: 2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:44:51,969 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 41.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:44:51,969 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.29ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 80.7MB in the end (delta: 2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:44:51,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory is still 41.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.29ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 80.7MB in the end (delta: 2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1515]: 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/busybox-1.22.0/basename-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:44:53,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:44:53,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:44:53,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:44:53,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:44:53,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:44:53,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:44:53,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:44:53,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:44:53,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:44:53,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:44:53,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:44:53,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:44:53,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:44:53,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:44:53,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:44:53,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:44:53,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:44:53,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:44:53,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:44:53,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:44:53,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:44:53,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:44:53,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:44:53,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:44:53,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:44:53,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:44:53,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:44:53,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:44:53,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:44:53,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:44:53,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:44:53,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:44:53,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:44:53,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:44:53,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:44:53,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:44:53,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:44:53,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:44:53,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:44:53,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:44:53,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-16 08:44:53,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:44:53,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:44:53,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:44:53,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:44:53,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:44:53,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:44:53,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:44:53,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:44:53,487 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:44:53,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:44:53,487 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:44:53,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:44:53,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:44:53,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:44:53,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:44:53,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:44:53,490 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:44:53,490 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:44:53,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:44:53,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:44:53,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 [2021-12-16 08:44:53,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:44:53,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:44:53,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:44:53,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:44:53,739 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:44:53,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-16 08:44:53,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c5dee99/9284dc74f3624549960210a9c9a74a2f/FLAGac8ecfa79 [2021-12-16 08:44:54,242 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:44:54,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-16 08:44:54,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c5dee99/9284dc74f3624549960210a9c9a74a2f/FLAGac8ecfa79 [2021-12-16 08:44:54,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c5dee99/9284dc74f3624549960210a9c9a74a2f [2021-12-16 08:44:54,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:44:54,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:44:54,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:44:54,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:44:54,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:44:54,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:44:54" (1/1) ... [2021-12-16 08:44:54,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a94e596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:54, skipping insertion in model container [2021-12-16 08:44:54,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:44:54" (1/1) ... [2021-12-16 08:44:54,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:44:54,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:44:55,178 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/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-16 08:44:55,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:44:55,226 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:44:55,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:44:55,267 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/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-16 08:44:55,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:44:55,290 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:44:55,315 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/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-16 08:44:55,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:44:55,388 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:44:55,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55 WrapperNode [2021-12-16 08:44:55,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:44:55,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:44:55,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:44:55,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:44:55,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,461 INFO L137 Inliner]: procedures = 352, calls = 112, calls flagged for inlining = 11, calls inlined = 10, statements flattened = 383 [2021-12-16 08:44:55,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:44:55,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:44:55,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:44:55,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:44:55,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:44:55,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:44:55,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:44:55,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:44:55,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (1/1) ... [2021-12-16 08:44:55,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:44:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:44:55,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 08:44:55,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 08:44:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:44:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:44:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 08:44:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 08:44:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:44:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-16 08:44:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:44:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:44:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:44:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-16 08:44:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:44:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:44:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:44:55,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:44:55,796 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:44:55,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:44:56,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:44:56,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:44:56,606 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-16 08:44:56,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:44:56 BoogieIcfgContainer [2021-12-16 08:44:56,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:44:56,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:44:56,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:44:56,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:44:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:44:54" (1/3) ... [2021-12-16 08:44:56,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a82b12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:44:56, skipping insertion in model container [2021-12-16 08:44:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:44:55" (2/3) ... [2021-12-16 08:44:56,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a82b12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:44:56, skipping insertion in model container [2021-12-16 08:44:56,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:44:56" (3/3) ... [2021-12-16 08:44:56,613 INFO L111 eAbstractionObserver]: Analyzing ICFG basename-1.i [2021-12-16 08:44:56,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:44:56,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2021-12-16 08:44:56,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:44:56,654 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 08:44:56,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2021-12-16 08:44:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 239 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:44:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:44:56,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:44:56,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:44:56,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:44:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:44:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-16 08:44:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:44:56,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167992542] [2021-12-16 08:44:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:44:56,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:44:56,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:44:56,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:44:56,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 08:44:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:44:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:44:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:44:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:44:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:44:56,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:44:56,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:44:56,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167992542] [2021-12-16 08:44:56,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167992542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:44:56,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:44:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:44:56,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401471776] [2021-12-16 08:44:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:44:56,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:44:56,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:44:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:44:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:44:56,919 INFO L87 Difference]: Start difference. First operand has 243 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 239 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:44:57,285 INFO L93 Difference]: Finished difference Result 251 states and 285 transitions. [2021-12-16 08:44:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:44:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-16 08:44:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:44:57,294 INFO L225 Difference]: With dead ends: 251 [2021-12-16 08:44:57,294 INFO L226 Difference]: Without dead ends: 249 [2021-12-16 08:44:57,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:44:57,300 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 239 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:44:57,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 207 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:44:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-16 08:44:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 233. [2021-12-16 08:44:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.8450704225352113) internal successors, (262), 229 states have internal predecessors, (262), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:44:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 266 transitions. [2021-12-16 08:44:57,362 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 266 transitions. Word has length 3 [2021-12-16 08:44:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:44:57,363 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 266 transitions. [2021-12-16 08:44:57,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 266 transitions. [2021-12-16 08:44:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:44:57,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:44:57,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:44:57,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 08:44:57,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:44:57,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:44:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:44:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-16 08:44:57,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:44:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573464845] [2021-12-16 08:44:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:44:57,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:44:57,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:44:57,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:44:57,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 08:44:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:44:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:44:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:44:57,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:44:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:44:57,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:44:57,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:44:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573464845] [2021-12-16 08:44:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573464845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:44:57,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:44:57,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:44:57,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994378218] [2021-12-16 08:44:57,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:44:57,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:44:57,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:44:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:44:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:44:57,692 INFO L87 Difference]: Start difference. First operand 233 states and 266 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:44:58,126 INFO L93 Difference]: Finished difference Result 232 states and 265 transitions. [2021-12-16 08:44:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:44:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-16 08:44:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:44:58,128 INFO L225 Difference]: With dead ends: 232 [2021-12-16 08:44:58,128 INFO L226 Difference]: Without dead ends: 232 [2021-12-16 08:44:58,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:44:58,128 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:44:58,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 432 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 08:44:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-16 08:44:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-16 08:44:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 142 states have (on average 1.8380281690140845) internal successors, (261), 228 states have internal predecessors, (261), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:44:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 265 transitions. [2021-12-16 08:44:58,134 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 265 transitions. Word has length 3 [2021-12-16 08:44:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:44:58,135 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 265 transitions. [2021-12-16 08:44:58,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 265 transitions. [2021-12-16 08:44:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 08:44:58,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:44:58,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 08:44:58,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 08:44:58,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:44:58,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:44:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:44:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-16 08:44:58,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:44:58,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748711266] [2021-12-16 08:44:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:44:58,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:44:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:44:58,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:44:58,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 08:44:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:44:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 08:44:58,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:44:58,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:44:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:44:58,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:44:58,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:44:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748711266] [2021-12-16 08:44:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748711266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:44:58,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:44:58,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:44:58,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592978743] [2021-12-16 08:44:58,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:44:58,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:44:58,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:44:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:44:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:44:58,536 INFO L87 Difference]: Start difference. First operand 232 states and 265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:44:58,998 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2021-12-16 08:44:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:44:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 08:44:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:44:59,000 INFO L225 Difference]: With dead ends: 236 [2021-12-16 08:44:59,000 INFO L226 Difference]: Without dead ends: 236 [2021-12-16 08:44:59,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:44:59,001 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 13 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 08:44:59,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 431 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 08:44:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-16 08:44:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-12-16 08:44:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 144 states have (on average 1.8263888888888888) internal successors, (263), 230 states have internal predecessors, (263), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:44:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 267 transitions. [2021-12-16 08:44:59,008 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 267 transitions. Word has length 6 [2021-12-16 08:44:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:44:59,008 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 267 transitions. [2021-12-16 08:44:59,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:44:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 267 transitions. [2021-12-16 08:44:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 08:44:59,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:44:59,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:44:59,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 08:44:59,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:44:59,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:44:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:44:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-12-16 08:44:59,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:44:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544651920] [2021-12-16 08:44:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:44:59,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:44:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:44:59,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:44:59,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 08:44:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:44:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:44:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:44:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:44:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:44:59,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:45:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:45:00,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544651920] [2021-12-16 08:45:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544651920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:45:00,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:45:00,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-16 08:45:00,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723141742] [2021-12-16 08:45:00,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:45:00,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:45:00,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:45:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:45:00,172 INFO L87 Difference]: Start difference. First operand 234 states and 267 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:45:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:03,060 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2021-12-16 08:45:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:45:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 08:45:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:03,062 INFO L225 Difference]: With dead ends: 240 [2021-12-16 08:45:03,062 INFO L226 Difference]: Without dead ends: 240 [2021-12-16 08:45:03,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-16 08:45:03,063 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 19 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:03,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1120 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-16 08:45:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-16 08:45:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-16 08:45:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 151 states have (on average 1.781456953642384) internal successors, (269), 236 states have internal predecessors, (269), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 273 transitions. [2021-12-16 08:45:03,072 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 273 transitions. Word has length 10 [2021-12-16 08:45:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:03,072 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 273 transitions. [2021-12-16 08:45:03,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:45:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 273 transitions. [2021-12-16 08:45:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 08:45:03,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:03,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:03,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:03,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:03,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -955562967, now seen corresponding path program 1 times [2021-12-16 08:45:03,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973735664] [2021-12-16 08:45:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:03,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:03,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 08:45:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 08:45:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:45:03,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:45:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:45:03,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973735664] [2021-12-16 08:45:03,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973735664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:45:03,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:45:03,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-16 08:45:03,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134013759] [2021-12-16 08:45:03,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:45:03,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 08:45:03,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 08:45:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-16 08:45:03,542 INFO L87 Difference]: Start difference. First operand 240 states and 273 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:45:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:03,699 INFO L93 Difference]: Finished difference Result 260 states and 293 transitions. [2021-12-16 08:45:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 08:45:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-16 08:45:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:03,704 INFO L225 Difference]: With dead ends: 260 [2021-12-16 08:45:03,704 INFO L226 Difference]: Without dead ends: 260 [2021-12-16 08:45:03,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-16 08:45:03,705 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 24 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:03,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1564 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:45:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-16 08:45:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-12-16 08:45:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 171 states have (on average 1.6900584795321638) internal successors, (289), 256 states have internal predecessors, (289), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 293 transitions. [2021-12-16 08:45:03,719 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 293 transitions. Word has length 25 [2021-12-16 08:45:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:03,719 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 293 transitions. [2021-12-16 08:45:03,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:45:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 293 transitions. [2021-12-16 08:45:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 08:45:03,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:03,721 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:03,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:03,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:03,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -167681350, now seen corresponding path program 2 times [2021-12-16 08:45:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657633541] [2021-12-16 08:45:03,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:45:03,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:03,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:03,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 08:45:04,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 08:45:04,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:45:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 08:45:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:04,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:45:04,143 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 08:45:04,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-16 08:45:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-16 08:45:04,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:04,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657633541] [2021-12-16 08:45:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657633541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:04,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:04,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:45:04,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275766592] [2021-12-16 08:45:04,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:04,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:45:04,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:45:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:45:04,170 INFO L87 Difference]: Start difference. First operand 260 states and 293 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:04,470 INFO L93 Difference]: Finished difference Result 271 states and 305 transitions. [2021-12-16 08:45:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:45:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-16 08:45:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:04,472 INFO L225 Difference]: With dead ends: 271 [2021-12-16 08:45:04,472 INFO L226 Difference]: Without dead ends: 271 [2021-12-16 08:45:04,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:45:04,472 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 224 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:04,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 210 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:45:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-16 08:45:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 255. [2021-12-16 08:45:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 171 states have (on average 1.6608187134502923) internal successors, (284), 251 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 288 transitions. [2021-12-16 08:45:04,477 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 288 transitions. Word has length 45 [2021-12-16 08:45:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:04,478 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 288 transitions. [2021-12-16 08:45:04,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 288 transitions. [2021-12-16 08:45:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 08:45:04,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:04,479 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:04,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:04,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:04,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -167681349, now seen corresponding path program 1 times [2021-12-16 08:45:04,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:04,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503763152] [2021-12-16 08:45:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:04,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:04,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:04,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 08:45:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 08:45:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:45:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:45:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:45:05,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:05,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503763152] [2021-12-16 08:45:05,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503763152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:45:05,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:45:05,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-16 08:45:05,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064556046] [2021-12-16 08:45:05,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:45:05,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 08:45:05,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 08:45:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-16 08:45:05,181 INFO L87 Difference]: Start difference. First operand 255 states and 288 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:45:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:05,482 INFO L93 Difference]: Finished difference Result 263 states and 296 transitions. [2021-12-16 08:45:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 08:45:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-16 08:45:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:05,484 INFO L225 Difference]: With dead ends: 263 [2021-12-16 08:45:05,484 INFO L226 Difference]: Without dead ends: 263 [2021-12-16 08:45:05,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-16 08:45:05,485 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 33 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:05,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 2862 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:45:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-16 08:45:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-16 08:45:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 179 states have (on average 1.6312849162011174) internal successors, (292), 259 states have internal predecessors, (292), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2021-12-16 08:45:05,489 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 45 [2021-12-16 08:45:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:05,490 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2021-12-16 08:45:05,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:45:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2021-12-16 08:45:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 08:45:05,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:05,491 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:05,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-16 08:45:05,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:05,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1953485173, now seen corresponding path program 2 times [2021-12-16 08:45:05,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:05,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563653639] [2021-12-16 08:45:05,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:45:05,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:05,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:05,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:05,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 08:45:05,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 08:45:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:45:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:45:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:05,979 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-16 08:45:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 08:45:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:06,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:06,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563653639] [2021-12-16 08:45:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563653639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:06,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 08:45:06,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055928185] [2021-12-16 08:45:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 08:45:06,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 08:45:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 08:45:06,053 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:07,248 INFO L93 Difference]: Finished difference Result 445 states and 509 transitions. [2021-12-16 08:45:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 08:45:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 08:45:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:07,253 INFO L225 Difference]: With dead ends: 445 [2021-12-16 08:45:07,253 INFO L226 Difference]: Without dead ends: 445 [2021-12-16 08:45:07,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:45:07,254 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 667 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:07,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 722 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 08:45:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-16 08:45:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 369. [2021-12-16 08:45:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 285 states have (on average 1.7228070175438597) internal successors, (491), 364 states have internal predecessors, (491), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 08:45:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 497 transitions. [2021-12-16 08:45:07,266 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 497 transitions. Word has length 53 [2021-12-16 08:45:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 497 transitions. [2021-12-16 08:45:07,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 497 transitions. [2021-12-16 08:45:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 08:45:07,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:07,270 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:07,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:07,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:07,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash -530101490, now seen corresponding path program 1 times [2021-12-16 08:45:07,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:07,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066561484] [2021-12-16 08:45:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:07,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:07,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 08:45:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 08:45:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:45:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 08:45:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 08:45:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:45:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 08:45:08,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:45:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-16 08:45:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:08,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:08,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066561484] [2021-12-16 08:45:08,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066561484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:08,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:08,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 08:45:08,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790498898] [2021-12-16 08:45:08,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:08,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 08:45:08,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 08:45:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 08:45:08,300 INFO L87 Difference]: Start difference. First operand 369 states and 497 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:08,395 INFO L93 Difference]: Finished difference Result 370 states and 498 transitions. [2021-12-16 08:45:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 08:45:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-16 08:45:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:08,397 INFO L225 Difference]: With dead ends: 370 [2021-12-16 08:45:08,397 INFO L226 Difference]: Without dead ends: 370 [2021-12-16 08:45:08,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-16 08:45:08,397 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 5 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:08,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1279 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 220 Unchecked, 0.0s Time] [2021-12-16 08:45:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-16 08:45:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-12-16 08:45:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 286 states have (on average 1.7202797202797202) internal successors, (492), 365 states have internal predecessors, (492), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 08:45:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 498 transitions. [2021-12-16 08:45:08,403 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 498 transitions. Word has length 56 [2021-12-16 08:45:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:08,403 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 498 transitions. [2021-12-16 08:45:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 498 transitions. [2021-12-16 08:45:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 08:45:08,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:08,404 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:08,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:08,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 746722395, now seen corresponding path program 1 times [2021-12-16 08:45:08,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745919478] [2021-12-16 08:45:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:08,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:08,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 08:45:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:08,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:45:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:08,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:08,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745919478] [2021-12-16 08:45:08,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745919478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:08,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:08,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:45:08,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930244935] [2021-12-16 08:45:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:08,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:45:08,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:45:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:45:08,879 INFO L87 Difference]: Start difference. First operand 370 states and 498 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:09,294 INFO L93 Difference]: Finished difference Result 387 states and 518 transitions. [2021-12-16 08:45:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:45:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-16 08:45:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:09,296 INFO L225 Difference]: With dead ends: 387 [2021-12-16 08:45:09,296 INFO L226 Difference]: Without dead ends: 387 [2021-12-16 08:45:09,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:45:09,296 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 394 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:09,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 244 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 08:45:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-16 08:45:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 363. [2021-12-16 08:45:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 286 states have (on average 1.6713286713286712) internal successors, (478), 358 states have internal predecessors, (478), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 08:45:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 484 transitions. [2021-12-16 08:45:09,302 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 484 transitions. Word has length 57 [2021-12-16 08:45:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:09,302 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 484 transitions. [2021-12-16 08:45:09,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 484 transitions. [2021-12-16 08:45:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 08:45:09,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:09,302 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:09,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:09,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:09,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 746722396, now seen corresponding path program 1 times [2021-12-16 08:45:09,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:09,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467501759] [2021-12-16 08:45:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:09,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:09,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:09,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:09,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 08:45:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:09,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 08:45:09,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:09,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:09,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:09,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467501759] [2021-12-16 08:45:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467501759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:09,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 08:45:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537472567] [2021-12-16 08:45:09,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:09,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 08:45:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 08:45:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 08:45:09,825 INFO L87 Difference]: Start difference. First operand 363 states and 484 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:10,063 INFO L93 Difference]: Finished difference Result 279 states and 313 transitions. [2021-12-16 08:45:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 08:45:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-16 08:45:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:10,064 INFO L225 Difference]: With dead ends: 279 [2021-12-16 08:45:10,064 INFO L226 Difference]: Without dead ends: 279 [2021-12-16 08:45:10,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:45:10,065 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 258 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:10,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 924 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:45:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-16 08:45:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 257. [2021-12-16 08:45:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 181 states have (on average 1.580110497237569) internal successors, (286), 253 states have internal predecessors, (286), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 290 transitions. [2021-12-16 08:45:10,069 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 290 transitions. Word has length 57 [2021-12-16 08:45:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:10,069 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 290 transitions. [2021-12-16 08:45:10,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 290 transitions. [2021-12-16 08:45:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 08:45:10,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:10,070 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:10,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:10,282 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1673575759, now seen corresponding path program 1 times [2021-12-16 08:45:10,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965627036] [2021-12-16 08:45:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:10,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:10,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 08:45:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:45:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:10,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:10,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965627036] [2021-12-16 08:45:10,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965627036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:10,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:10,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:45:10,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740114288] [2021-12-16 08:45:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:45:10,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:45:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:45:10,578 INFO L87 Difference]: Start difference. First operand 257 states and 290 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:11,234 INFO L93 Difference]: Finished difference Result 275 states and 309 transitions. [2021-12-16 08:45:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:45:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-12-16 08:45:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:11,236 INFO L225 Difference]: With dead ends: 275 [2021-12-16 08:45:11,236 INFO L226 Difference]: Without dead ends: 275 [2021-12-16 08:45:11,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:45:11,236 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 254 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:11,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 624 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 08:45:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-16 08:45:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2021-12-16 08:45:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 193 states have (on average 1.5751295336787565) internal successors, (304), 264 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 308 transitions. [2021-12-16 08:45:11,240 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 308 transitions. Word has length 58 [2021-12-16 08:45:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 308 transitions. [2021-12-16 08:45:11,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 308 transitions. [2021-12-16 08:45:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 08:45:11,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:11,241 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:11,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:11,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:11,441 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 341240963, now seen corresponding path program 1 times [2021-12-16 08:45:11,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:11,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755257708] [2021-12-16 08:45:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:11,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:11,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 08:45:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 08:45:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:11,954 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 08:45:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-16 08:45:11,978 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-16 08:45:11,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-16 08:45:12,162 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:45:12,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 08:45:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 08:45:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:12,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:12,342 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:12,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755257708] [2021-12-16 08:45:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755257708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:12,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:12,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 08:45:12,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591626878] [2021-12-16 08:45:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:12,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 08:45:12,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 08:45:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-16 08:45:12,344 INFO L87 Difference]: Start difference. First operand 268 states and 308 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:12,436 INFO L93 Difference]: Finished difference Result 268 states and 307 transitions. [2021-12-16 08:45:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 08:45:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-16 08:45:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:12,437 INFO L225 Difference]: With dead ends: 268 [2021-12-16 08:45:12,437 INFO L226 Difference]: Without dead ends: 268 [2021-12-16 08:45:12,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 08:45:12,438 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 4 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:12,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1353 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 329 Unchecked, 0.0s Time] [2021-12-16 08:45:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-16 08:45:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-12-16 08:45:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 193 states have (on average 1.5699481865284974) internal successors, (303), 264 states have internal predecessors, (303), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 307 transitions. [2021-12-16 08:45:12,445 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 307 transitions. Word has length 59 [2021-12-16 08:45:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:12,445 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 307 transitions. [2021-12-16 08:45:12,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 307 transitions. [2021-12-16 08:45:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 08:45:12,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:12,446 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:12,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:12,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:12,659 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash 341240962, now seen corresponding path program 1 times [2021-12-16 08:45:12,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:12,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419420668] [2021-12-16 08:45:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:12,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:12,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:12,662 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:12,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 08:45:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:13,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:45:13,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:13,092 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-16 08:45:13,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-16 08:45:13,121 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:45:13,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-16 08:45:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:13,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:13,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419420668] [2021-12-16 08:45:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419420668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:13,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:45:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048416612] [2021-12-16 08:45:13,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:45:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:45:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:45:13,140 INFO L87 Difference]: Start difference. First operand 268 states and 307 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:13,461 INFO L93 Difference]: Finished difference Result 275 states and 314 transitions. [2021-12-16 08:45:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:45:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-16 08:45:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:13,462 INFO L225 Difference]: With dead ends: 275 [2021-12-16 08:45:13,462 INFO L226 Difference]: Without dead ends: 275 [2021-12-16 08:45:13,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:45:13,463 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 210 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:13,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 354 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:45:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-16 08:45:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2021-12-16 08:45:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 198 states have (on average 1.5656565656565657) internal successors, (310), 268 states have internal predecessors, (310), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 314 transitions. [2021-12-16 08:45:13,466 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 314 transitions. Word has length 59 [2021-12-16 08:45:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:13,467 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 314 transitions. [2021-12-16 08:45:13,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 314 transitions. [2021-12-16 08:45:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 08:45:13,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:13,467 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:13,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:13,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:13,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -278071788, now seen corresponding path program 1 times [2021-12-16 08:45:13,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:13,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304898733] [2021-12-16 08:45:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:13,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:13,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:13,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 08:45:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:45:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:14,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:45:14,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:14,243 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-16 08:45:14,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-12-16 08:45:14,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 08:45:14,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 15 [2021-12-16 08:45:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:14,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:14,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304898733] [2021-12-16 08:45:14,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304898733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:14,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:14,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 08:45:14,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628212995] [2021-12-16 08:45:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:45:14,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:45:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:45:14,326 INFO L87 Difference]: Start difference. First operand 272 states and 314 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:14,943 INFO L93 Difference]: Finished difference Result 270 states and 310 transitions. [2021-12-16 08:45:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 08:45:14,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-16 08:45:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:14,944 INFO L225 Difference]: With dead ends: 270 [2021-12-16 08:45:14,945 INFO L226 Difference]: Without dead ends: 270 [2021-12-16 08:45:14,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 08:45:14,945 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 236 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:14,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1002 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 338 Invalid, 0 Unknown, 82 Unchecked, 0.6s Time] [2021-12-16 08:45:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-16 08:45:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-16 08:45:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 198 states have (on average 1.5454545454545454) internal successors, (306), 266 states have internal predecessors, (306), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-12-16 08:45:14,949 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 62 [2021-12-16 08:45:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-12-16 08:45:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-12-16 08:45:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 08:45:14,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:14,950 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:14,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:15,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:15,164 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -278071787, now seen corresponding path program 1 times [2021-12-16 08:45:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:15,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107454891] [2021-12-16 08:45:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:15,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:15,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:15,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 08:45:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 08:45:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:15,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 08:45:15,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:45:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:15,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:15,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-16 08:45:15,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 08:45:15,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-12-16 08:45:15,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-16 08:45:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:15,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:15,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107454891] [2021-12-16 08:45:15,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107454891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:15,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:15,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 08:45:15,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645836705] [2021-12-16 08:45:15,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:15,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 08:45:15,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 08:45:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:45:15,861 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:16,992 INFO L93 Difference]: Finished difference Result 269 states and 308 transitions. [2021-12-16 08:45:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 08:45:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-16 08:45:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:16,994 INFO L225 Difference]: With dead ends: 269 [2021-12-16 08:45:16,994 INFO L226 Difference]: Without dead ends: 269 [2021-12-16 08:45:16,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-16 08:45:16,994 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 233 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:16,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 836 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 08:45:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-16 08:45:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-16 08:45:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 198 states have (on average 1.5353535353535352) internal successors, (304), 265 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2021-12-16 08:45:16,998 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 62 [2021-12-16 08:45:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:16,999 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2021-12-16 08:45:16,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2021-12-16 08:45:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 08:45:16,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:16,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:17,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:17,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:17,208 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -450354753, now seen corresponding path program 1 times [2021-12-16 08:45:17,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995133956] [2021-12-16 08:45:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:17,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:17,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:17,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 08:45:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:17,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 08:45:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 08:45:17,760 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:45:17,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 08:45:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:17,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-12-16 08:45:17,954 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:45:17,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-16 08:45:17,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-12-16 08:45:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:18,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:18,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995133956] [2021-12-16 08:45:18,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995133956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:18,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:18,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 08:45:18,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936222527] [2021-12-16 08:45:18,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:18,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 08:45:18,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 08:45:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-16 08:45:18,053 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:18,856 INFO L93 Difference]: Finished difference Result 290 states and 330 transitions. [2021-12-16 08:45:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 08:45:18,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-16 08:45:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:18,857 INFO L225 Difference]: With dead ends: 290 [2021-12-16 08:45:18,858 INFO L226 Difference]: Without dead ends: 290 [2021-12-16 08:45:18,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-16 08:45:18,858 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 457 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:18,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 668 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 273 Invalid, 0 Unknown, 91 Unchecked, 0.7s Time] [2021-12-16 08:45:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-16 08:45:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 278. [2021-12-16 08:45:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 207 states have (on average 1.541062801932367) internal successors, (319), 274 states have internal predecessors, (319), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 323 transitions. [2021-12-16 08:45:18,863 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 323 transitions. Word has length 66 [2021-12-16 08:45:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 323 transitions. [2021-12-16 08:45:18,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 323 transitions. [2021-12-16 08:45:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 08:45:18,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:18,864 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:18,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 08:45:19,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:19,065 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash -450354752, now seen corresponding path program 1 times [2021-12-16 08:45:19,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009566876] [2021-12-16 08:45:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:19,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:19,067 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:19,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 08:45:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 08:45:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 08:45:19,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:45:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-16 08:45:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 08:45:19,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-16 08:45:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 08:45:19,913 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:45:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-16 08:45:19,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 08:45:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-16 08:45:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-16 08:45:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 08:45:20,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:45:20,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:45:20,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009566876] [2021-12-16 08:45:20,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009566876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:45:20,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:45:20,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 08:45:20,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410514161] [2021-12-16 08:45:20,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:45:20,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 08:45:20,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:45:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 08:45:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 08:45:20,038 INFO L87 Difference]: Start difference. First operand 278 states and 323 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:45:21,679 INFO L93 Difference]: Finished difference Result 290 states and 327 transitions. [2021-12-16 08:45:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:45:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-16 08:45:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:45:21,681 INFO L225 Difference]: With dead ends: 290 [2021-12-16 08:45:21,681 INFO L226 Difference]: Without dead ends: 290 [2021-12-16 08:45:21,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-16 08:45:21,682 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 476 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:45:21,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 694 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 08:45:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-16 08:45:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 278. [2021-12-16 08:45:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 207 states have (on average 1.5217391304347827) internal successors, (315), 274 states have internal predecessors, (315), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 08:45:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 319 transitions. [2021-12-16 08:45:21,694 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 319 transitions. Word has length 66 [2021-12-16 08:45:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:45:21,694 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 319 transitions. [2021-12-16 08:45:21,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 08:45:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 319 transitions. [2021-12-16 08:45:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 08:45:21,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:45:21,695 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:45:21,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-16 08:45:21,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:45:21,907 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-16 08:45:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:45:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1408765628, now seen corresponding path program 1 times [2021-12-16 08:45:21,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:45:21,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614905019] [2021-12-16 08:45:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:45:21,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:45:21,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:45:21,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:45:21,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 08:45:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:45:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 08:45:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:45:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 08:45:22,541 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:45:22,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-16 08:45:22,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 08:45:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-12-16 08:45:22,735 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:45:22,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-16 08:45:22,826 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:45:22,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-16 08:45:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-12-16 08:45:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-16 08:45:22,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:45:23,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem128#1.base| v_ArrVal_1321) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (_ bv1 1)))) is different from false [2021-12-16 08:45:23,033 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse0 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1321) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0))) (_ bv1 1)))) is different from false [2021-12-16 08:45:23,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1320 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem126#1.base| v_ArrVal_1320))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1321)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-16 08:45:23,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1320 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1320))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1321)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-16 08:45:23,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1320 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1319 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1319))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1320)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1321)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2021-12-16 08:45:23,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 08:45:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 78 [2021-12-16 08:45:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10243 treesize of output 8200 [2021-12-16 08:45:23,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6116 treesize of output 5080 [2021-12-16 08:45:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5080 treesize of output 4856 [2021-12-16 08:45:23,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4856 treesize of output 4107