./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/uthash-2.0.2/uthash_OAT_test8-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:53:08,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:53:08,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:53:08,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:53:08,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:53:08,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:53:08,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:53:08,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:53:08,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:53:08,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:53:08,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:53:08,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:53:08,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:53:08,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:53:08,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:53:08,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:53:08,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:53:08,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:53:08,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:53:08,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:53:08,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:53:08,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:53:08,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:53:08,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:53:08,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:53:08,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:53:08,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:53:08,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:53:08,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:53:08,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:53:08,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:53:08,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:53:08,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:53:08,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:53:08,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:53:08,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:53:08,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:53:08,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:53:08,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:53:08,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:53:08,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:53:08,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 08:53:08,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:53:08,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:53:08,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:53:08,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:53:08,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:53:08,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:53:08,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:53:08,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:53:08,592 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:53:08,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:53:08,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:53:08,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:53:08,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:53:08,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:53:08,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:53:08,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:53:08,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:53:08,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:53:08,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:53:08,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:53:08,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:53:08,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:53:08,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:53:08,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:53:08,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:53:08,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 [2021-12-16 08:53:08,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:53:08,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:53:08,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:53:08,794 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:53:08,795 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:53:08,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-12-16 08:53:08,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9abee9a/e4f1cd68bc04488b949e3104ef5e60fc/FLAG14dd419ff [2021-12-16 08:53:09,352 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:53:09,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-12-16 08:53:09,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9abee9a/e4f1cd68bc04488b949e3104ef5e60fc/FLAG14dd419ff [2021-12-16 08:53:09,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9abee9a/e4f1cd68bc04488b949e3104ef5e60fc [2021-12-16 08:53:09,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:53:09,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:53:09,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:53:09,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:53:09,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:53:09,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:53:09" (1/1) ... [2021-12-16 08:53:09,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a610262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:09, skipping insertion in model container [2021-12-16 08:53:09,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:53:09" (1/1) ... [2021-12-16 08:53:09,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:53:09,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:53:10,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-12-16 08:53:10,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-12-16 08:53:10,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:53:10,246 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 08:53:10,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e3ab6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:10, skipping insertion in model container [2021-12-16 08:53:10,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:53:10,247 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:53:10,248 INFO L158 Benchmark]: Toolchain (without parser) took 430.38ms. Allocated memory is still 98.6MB. Free memory was 66.3MB in the beginning and 61.2MB in the end (delta: 5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:53:10,249 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:53:10,249 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.28ms. Allocated memory is still 98.6MB. Free memory was 66.3MB in the beginning and 61.2MB in the end (delta: 5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:53:10,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.28ms. Allocated memory is still 98.6MB. Free memory was 66.3MB in the beginning and 61.2MB in the end (delta: 5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 766]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:53:11,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:53:11,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:53:11,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:53:11,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:53:11,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:53:11,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:53:11,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:53:11,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:53:11,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:53:11,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:53:11,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:53:11,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:53:11,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:53:11,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:53:11,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:53:11,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:53:11,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:53:11,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:53:11,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:53:11,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:53:11,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:53:11,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:53:11,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:53:11,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:53:11,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:53:11,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:53:11,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:53:11,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:53:11,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:53:11,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:53:11,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:53:11,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:53:11,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:53:11,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:53:11,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:53:11,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:53:11,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:53:11,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:53:11,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:53:11,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:53:11,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 08:53:11,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:53:11,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:53:11,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:53:11,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:53:11,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:53:11,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:53:11,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:53:11,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:53:11,805 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:53:11,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:53:11,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:53:11,806 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:53:11,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:53:11,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:53:11,808 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:53:11,808 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:53:11,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:53:11,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:53:11,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:53:11,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:53:11,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:53:11,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:53:11,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:53:11,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:53:11,816 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:53:11,816 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:53:11,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:53:11,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:53:11,817 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 [2021-12-16 08:53:12,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:53:12,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:53:12,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:53:12,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:53:12,075 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:53:12,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-12-16 08:53:12,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea24cfe/9718fd29c0d84cc9b5cc3aa925d499f4/FLAG562e5575f [2021-12-16 08:53:12,605 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:53:12,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-12-16 08:53:12,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea24cfe/9718fd29c0d84cc9b5cc3aa925d499f4/FLAG562e5575f [2021-12-16 08:53:12,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dea24cfe/9718fd29c0d84cc9b5cc3aa925d499f4 [2021-12-16 08:53:12,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:53:12,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:53:12,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:53:12,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:53:12,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:53:12,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:53:12" (1/1) ... [2021-12-16 08:53:12,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd0183e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:12, skipping insertion in model container [2021-12-16 08:53:12,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:53:12" (1/1) ... [2021-12-16 08:53:12,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:53:12,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:53:13,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-12-16 08:53:13,114 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-12-16 08:53:13,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:53:13,147 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:53:13,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:53:13,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-12-16 08:53:13,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-12-16 08:53:13,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:53:13,250 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:53:13,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-12-16 08:53:13,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-12-16 08:53:13,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:53:13,345 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:53:13,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13 WrapperNode [2021-12-16 08:53:13,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:53:13,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:53:13,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:53:13,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:53:13,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,452 INFO L137 Inliner]: procedures = 180, calls = 348, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1175 [2021-12-16 08:53:13,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:53:13,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:53:13,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:53:13,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:53:13,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:53:13,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:53:13,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:53:13,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:53:13,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (1/1) ... [2021-12-16 08:53:13,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:53:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:53:13,593 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 08:53:13,599 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 08:53:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:53:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:53:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 08:53:13,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 08:53:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 08:53:13,625 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 08:53:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-12-16 08:53:13,625 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-12-16 08:53:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:53:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:53:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:53:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:53:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:53:13,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:53:13,837 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:53:13,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:53:13,841 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-16 08:53:17,058 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:53:17,066 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:53:17,067 INFO L301 CfgBuilder]: Removed 71 assume(true) statements. [2021-12-16 08:53:17,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:53:17 BoogieIcfgContainer [2021-12-16 08:53:17,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:53:17,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:53:17,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:53:17,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:53:17,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:53:12" (1/3) ... [2021-12-16 08:53:17,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86edff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:53:17, skipping insertion in model container [2021-12-16 08:53:17,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:53:13" (2/3) ... [2021-12-16 08:53:17,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86edff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:53:17, skipping insertion in model container [2021-12-16 08:53:17,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:53:17" (3/3) ... [2021-12-16 08:53:17,074 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test8-2.i [2021-12-16 08:53:17,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:53:17,078 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 641 error locations. [2021-12-16 08:53:17,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:53:17,111 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 08:53:17,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 641 error locations. [2021-12-16 08:53:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 1296 states, 634 states have (on average 2.2539432176656153) internal successors, (1429), 1287 states have internal predecessors, (1429), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 08:53:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:53:17,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:17,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:53:17,136 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 132136, now seen corresponding path program 1 times [2021-12-16 08:53:17,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:17,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753770240] [2021-12-16 08:53:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:17,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:17,150 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 08:53:17,176 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 08:53:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:17,345 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 08:53:17,352 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 08:53:17,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:17,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:17,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753770240] [2021-12-16 08:53:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753770240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:17,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:17,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:53:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296048096] [2021-12-16 08:53:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:17,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:17,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:17,378 INFO L87 Difference]: Start difference. First operand has 1296 states, 634 states have (on average 2.2539432176656153) internal successors, (1429), 1287 states have internal predecessors, (1429), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) 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 08:53:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:18,989 INFO L93 Difference]: Finished difference Result 1476 states and 1582 transitions. [2021-12-16 08:53:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:18,991 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 08:53:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:19,007 INFO L225 Difference]: With dead ends: 1476 [2021-12-16 08:53:19,008 INFO L226 Difference]: Without dead ends: 1474 [2021-12-16 08:53:19,009 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 08:53:19,011 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1162 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:19,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 1048 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 08:53:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-12-16 08:53:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1285. [2021-12-16 08:53:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 637 states have (on average 2.111459968602826) internal successors, (1345), 1275 states have internal predecessors, (1345), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-16 08:53:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1387 transitions. [2021-12-16 08:53:19,080 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1387 transitions. Word has length 3 [2021-12-16 08:53:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:19,082 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1387 transitions. [2021-12-16 08:53:19,082 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 08:53:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1387 transitions. [2021-12-16 08:53:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:53:19,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:19,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:53:19,095 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 08:53:19,284 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 08:53:19,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash 132137, now seen corresponding path program 1 times [2021-12-16 08:53:19,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155738673] [2021-12-16 08:53:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:19,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:19,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:19,289 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 08:53:19,329 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 08:53:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:53:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:19,434 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 08:53:19,443 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 08:53:19,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:19,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155738673] [2021-12-16 08:53:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155738673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:19,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:19,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:53:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351809584] [2021-12-16 08:53:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:19,451 INFO L87 Difference]: Start difference. First operand 1285 states and 1387 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 08:53:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:21,734 INFO L93 Difference]: Finished difference Result 1877 states and 2020 transitions. [2021-12-16 08:53:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:21,735 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 08:53:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:21,740 INFO L225 Difference]: With dead ends: 1877 [2021-12-16 08:53:21,740 INFO L226 Difference]: Without dead ends: 1877 [2021-12-16 08:53:21,740 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 08:53:21,741 INFO L933 BasicCegarLoop]: 1090 mSDtfsCounter, 631 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1840 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:53:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-12-16 08:53:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1489. [2021-12-16 08:53:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 841 states have (on average 2.097502972651605) internal successors, (1764), 1478 states have internal predecessors, (1764), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 08:53:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1808 transitions. [2021-12-16 08:53:21,765 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1808 transitions. Word has length 3 [2021-12-16 08:53:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:21,765 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1808 transitions. [2021-12-16 08:53:21,765 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 08:53:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1808 transitions. [2021-12-16 08:53:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 08:53:21,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:21,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:21,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-16 08:53:21,972 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 08:53:21,973 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1773817970, now seen corresponding path program 1 times [2021-12-16 08:53:21,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:21,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57551201] [2021-12-16 08:53:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:21,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:21,975 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 08:53:21,976 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 08:53:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:53:22,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:22,102 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 08:53:22,107 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 08:53:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:53:22,191 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 12 treesize of output 14 [2021-12-16 08:53:22,202 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:53:22,203 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 08:53:22,224 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 08:53:22,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:22,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57551201] [2021-12-16 08:53:22,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57551201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:22,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:22,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:22,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152538676] [2021-12-16 08:53:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:22,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:22,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:22,228 INFO L87 Difference]: Start difference. First operand 1489 states and 1808 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:24,453 INFO L93 Difference]: Finished difference Result 1671 states and 1997 transitions. [2021-12-16 08:53:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 08:53:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:24,458 INFO L225 Difference]: With dead ends: 1671 [2021-12-16 08:53:24,458 INFO L226 Difference]: Without dead ends: 1671 [2021-12-16 08:53:24,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:24,461 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 2605 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2611 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:24,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2611 Valid, 645 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:53:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-12-16 08:53:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1274. [2021-12-16 08:53:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 637 states have (on average 2.0926216640502355) internal successors, (1333), 1264 states have internal predecessors, (1333), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-16 08:53:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1375 transitions. [2021-12-16 08:53:24,487 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1375 transitions. Word has length 7 [2021-12-16 08:53:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:24,488 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1375 transitions. [2021-12-16 08:53:24,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1375 transitions. [2021-12-16 08:53:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:53:24,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:24,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:24,499 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 08:53:24,699 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 08:53:24,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash -846217710, now seen corresponding path program 1 times [2021-12-16 08:53:24,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:24,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566738521] [2021-12-16 08:53:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:24,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:24,707 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 08:53:24,709 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 08:53:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:24,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:24,828 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 08:53:24,839 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 08:53:24,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:24,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566738521] [2021-12-16 08:53:24,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566738521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:24,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:24,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:53:24,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630301465] [2021-12-16 08:53:24,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:24,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:24,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:24,842 INFO L87 Difference]: Start difference. First operand 1274 states and 1375 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:26,258 INFO L93 Difference]: Finished difference Result 1601 states and 1729 transitions. [2021-12-16 08:53:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:26,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 08:53:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:26,263 INFO L225 Difference]: With dead ends: 1601 [2021-12-16 08:53:26,264 INFO L226 Difference]: Without dead ends: 1601 [2021-12-16 08:53:26,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:26,265 INFO L933 BasicCegarLoop]: 1204 mSDtfsCounter, 988 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:26,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 1610 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 08:53:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-12-16 08:53:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1227. [2021-12-16 08:53:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 637 states have (on average 2.0172684458398744) internal successors, (1285), 1217 states have internal predecessors, (1285), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-16 08:53:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1327 transitions. [2021-12-16 08:53:26,292 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1327 transitions. Word has length 8 [2021-12-16 08:53:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:26,292 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1327 transitions. [2021-12-16 08:53:26,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1327 transitions. [2021-12-16 08:53:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:53:26,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:26,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:26,300 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 08:53:26,499 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 08:53:26,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -846217709, now seen corresponding path program 1 times [2021-12-16 08:53:26,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642503152] [2021-12-16 08:53:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:26,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:26,501 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 08:53:26,503 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 08:53:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:53:26,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:26,608 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 08:53:26,622 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 08:53:26,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:26,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:26,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642503152] [2021-12-16 08:53:26,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642503152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:26,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:26,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:53:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249256730] [2021-12-16 08:53:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:26,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:26,624 INFO L87 Difference]: Start difference. First operand 1227 states and 1327 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:28,545 INFO L93 Difference]: Finished difference Result 1694 states and 1828 transitions. [2021-12-16 08:53:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 08:53:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:28,557 INFO L225 Difference]: With dead ends: 1694 [2021-12-16 08:53:28,557 INFO L226 Difference]: Without dead ends: 1694 [2021-12-16 08:53:28,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:28,557 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 684 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:28,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 2010 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 08:53:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-12-16 08:53:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1469. [2021-12-16 08:53:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 887 states have (on average 2.0056369785794814) internal successors, (1779), 1457 states have internal predecessors, (1779), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 9 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 08:53:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1825 transitions. [2021-12-16 08:53:28,578 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1825 transitions. Word has length 8 [2021-12-16 08:53:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:28,578 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 1825 transitions. [2021-12-16 08:53:28,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1825 transitions. [2021-12-16 08:53:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 08:53:28,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:28,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:28,587 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 08:53:28,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:53:28,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr534REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1255764539, now seen corresponding path program 1 times [2021-12-16 08:53:28,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069657905] [2021-12-16 08:53:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:28,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:28,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:53:28,789 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 08:53:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:28,968 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 08:53:28,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:28,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069657905] [2021-12-16 08:53:28,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069657905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:28,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:28,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:28,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864096130] [2021-12-16 08:53:28,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:28,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:28,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:28,970 INFO L87 Difference]: Start difference. First operand 1469 states and 1825 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:29,255 INFO L93 Difference]: Finished difference Result 2286 states and 2860 transitions. [2021-12-16 08:53:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 08:53:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:29,262 INFO L225 Difference]: With dead ends: 2286 [2021-12-16 08:53:29,262 INFO L226 Difference]: Without dead ends: 2286 [2021-12-16 08:53:29,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:29,264 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 748 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:29,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 2563 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 08:53:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-12-16 08:53:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1869. [2021-12-16 08:53:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1285 states have (on average 1.9883268482490273) internal successors, (2555), 1855 states have internal predecessors, (2555), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2605 transitions. [2021-12-16 08:53:29,301 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2605 transitions. Word has length 11 [2021-12-16 08:53:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:29,301 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2605 transitions. [2021-12-16 08:53:29,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2605 transitions. [2021-12-16 08:53:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 08:53:29,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:29,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:29,311 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 08:53:29,513 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 08:53:29,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr344REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash -680989669, now seen corresponding path program 1 times [2021-12-16 08:53:29,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20387589] [2021-12-16 08:53:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:29,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:29,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:29,514 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 08:53:29,515 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 08:53:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:29,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:53:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:29,639 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 08:53:29,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:29,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20387589] [2021-12-16 08:53:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20387589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:29,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391564988] [2021-12-16 08:53:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:29,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:29,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:29,641 INFO L87 Difference]: Start difference. First operand 1869 states and 2605 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:29,663 INFO L93 Difference]: Finished difference Result 1992 states and 2665 transitions. [2021-12-16 08:53:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 08:53:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:29,669 INFO L225 Difference]: With dead ends: 1992 [2021-12-16 08:53:29,669 INFO L226 Difference]: Without dead ends: 1992 [2021-12-16 08:53:29,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 08:53:29,670 INFO L933 BasicCegarLoop]: 1462 mSDtfsCounter, 585 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:29,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2352 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:53:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-12-16 08:53:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1773. [2021-12-16 08:53:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1213 states have (on average 1.964550700741962) internal successors, (2383), 1759 states have internal predecessors, (2383), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2433 transitions. [2021-12-16 08:53:29,698 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2433 transitions. Word has length 13 [2021-12-16 08:53:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:29,699 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 2433 transitions. [2021-12-16 08:53:29,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2433 transitions. [2021-12-16 08:53:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 08:53:29,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:29,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:29,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 08:53:29,907 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 08:53:29,907 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr639ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1323693751, now seen corresponding path program 1 times [2021-12-16 08:53:29,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166969947] [2021-12-16 08:53:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:29,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:29,909 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 08:53:29,910 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 08:53:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:53:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:30,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:53:30,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:53:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:53:30,091 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-12-16 08:53:30,091 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-12-16 08:53:30,129 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-16 08:53:30,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-12-16 08:53:30,145 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 08:53:30,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:30,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166969947] [2021-12-16 08:53:30,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166969947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:30,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:30,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:30,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654452380] [2021-12-16 08:53:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:30,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:30,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:30,146 INFO L87 Difference]: Start difference. First operand 1773 states and 2433 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:31,122 INFO L93 Difference]: Finished difference Result 2415 states and 3336 transitions. [2021-12-16 08:53:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 08:53:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:31,128 INFO L225 Difference]: With dead ends: 2415 [2021-12-16 08:53:31,128 INFO L226 Difference]: Without dead ends: 2415 [2021-12-16 08:53:31,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:53:31,129 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 461 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:31,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 3538 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 08:53:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-12-16 08:53:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1772. [2021-12-16 08:53:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1212 states have (on average 1.9645214521452146) internal successors, (2381), 1758 states have internal predecessors, (2381), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2431 transitions. [2021-12-16 08:53:31,156 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2431 transitions. Word has length 14 [2021-12-16 08:53:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2431 transitions. [2021-12-16 08:53:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2431 transitions. [2021-12-16 08:53:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 08:53:31,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:31,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:31,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 08:53:31,365 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 08:53:31,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -413650658, now seen corresponding path program 1 times [2021-12-16 08:53:31,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:31,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587785931] [2021-12-16 08:53:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:31,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:31,367 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 08:53:31,368 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 08:53:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:53:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:31,530 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 08:53:31,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:31,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587785931] [2021-12-16 08:53:31,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587785931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:31,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:31,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:31,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049341388] [2021-12-16 08:53:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:53:31,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:53:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:53:31,532 INFO L87 Difference]: Start difference. First operand 1772 states and 2431 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:31,567 INFO L93 Difference]: Finished difference Result 1712 states and 2345 transitions. [2021-12-16 08:53:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:53:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 08:53:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:31,572 INFO L225 Difference]: With dead ends: 1712 [2021-12-16 08:53:31,573 INFO L226 Difference]: Without dead ends: 1712 [2021-12-16 08:53:31,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 08:53:31,575 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 1131 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:31,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1311 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:53:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-16 08:53:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2021-12-16 08:53:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1176 states have (on average 1.9515306122448979) internal successors, (2295), 1698 states have internal predecessors, (2295), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2345 transitions. [2021-12-16 08:53:31,601 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2345 transitions. Word has length 18 [2021-12-16 08:53:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:31,601 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2345 transitions. [2021-12-16 08:53:31,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2345 transitions. [2021-12-16 08:53:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 08:53:31,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:31,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:31,615 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 08:53:31,809 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 08:53:31,809 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1913675577, now seen corresponding path program 1 times [2021-12-16 08:53:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24969916] [2021-12-16 08:53:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:31,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:31,811 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 08:53:31,813 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 08:53:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:31,986 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 08:53:31,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:31,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24969916] [2021-12-16 08:53:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24969916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:31,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:31,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:31,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524071522] [2021-12-16 08:53:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:31,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:31,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:31,988 INFO L87 Difference]: Start difference. First operand 1712 states and 2345 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:32,035 INFO L93 Difference]: Finished difference Result 1684 states and 2289 transitions. [2021-12-16 08:53:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-16 08:53:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:32,039 INFO L225 Difference]: With dead ends: 1684 [2021-12-16 08:53:32,039 INFO L226 Difference]: Without dead ends: 1684 [2021-12-16 08:53:32,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 08:53:32,040 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 1102 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:32,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 2433 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:53:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-12-16 08:53:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1682. [2021-12-16 08:53:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1160 states have (on average 1.928448275862069) internal successors, (2237), 1668 states have internal predecessors, (2237), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2287 transitions. [2021-12-16 08:53:32,057 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2287 transitions. Word has length 20 [2021-12-16 08:53:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:32,057 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 2287 transitions. [2021-12-16 08:53:32,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2287 transitions. [2021-12-16 08:53:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:53:32,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:32,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:32,075 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 08:53:32,265 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 08:53:32,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753126, now seen corresponding path program 1 times [2021-12-16 08:53:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892232912] [2021-12-16 08:53:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:32,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:32,267 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 08:53:32,267 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 08:53:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:53:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:32,417 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 08:53:32,491 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 08:53:32,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:32,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892232912] [2021-12-16 08:53:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892232912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:32,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478663069] [2021-12-16 08:53:32,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:32,494 INFO L87 Difference]: Start difference. First operand 1682 states and 2287 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:34,129 INFO L93 Difference]: Finished difference Result 2541 states and 3552 transitions. [2021-12-16 08:53:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:53:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 08:53:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:34,136 INFO L225 Difference]: With dead ends: 2541 [2021-12-16 08:53:34,136 INFO L226 Difference]: Without dead ends: 2541 [2021-12-16 08:53:34,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 08:53:34,137 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 2164 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2166 Valid, 1290 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 08:53:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-12-16 08:53:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1678. [2021-12-16 08:53:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1160 states have (on average 1.921551724137931) internal successors, (2229), 1664 states have internal predecessors, (2229), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2279 transitions. [2021-12-16 08:53:34,181 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2279 transitions. Word has length 34 [2021-12-16 08:53:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:34,181 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 2279 transitions. [2021-12-16 08:53:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2279 transitions. [2021-12-16 08:53:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:53:34,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:34,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:34,190 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 08:53:34,390 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 08:53:34,390 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753127, now seen corresponding path program 1 times [2021-12-16 08:53:34,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:34,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409261196] [2021-12-16 08:53:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:34,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:34,392 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 08:53:34,394 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 08:53:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:34,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:53:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:34,551 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 08:53:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:34,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:34,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409261196] [2021-12-16 08:53:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409261196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:34,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:34,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009583471] [2021-12-16 08:53:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:34,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:34,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:34,703 INFO L87 Difference]: Start difference. First operand 1678 states and 2279 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:37,494 INFO L93 Difference]: Finished difference Result 2089 states and 2498 transitions. [2021-12-16 08:53:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 08:53:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 08:53:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:37,499 INFO L225 Difference]: With dead ends: 2089 [2021-12-16 08:53:37,499 INFO L226 Difference]: Without dead ends: 2089 [2021-12-16 08:53:37,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 08:53:37,500 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 1298 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:37,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 2787 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-16 08:53:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-12-16 08:53:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1674. [2021-12-16 08:53:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1160 states have (on average 1.914655172413793) internal successors, (2221), 1660 states have internal predecessors, (2221), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2271 transitions. [2021-12-16 08:53:37,518 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2271 transitions. Word has length 34 [2021-12-16 08:53:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:37,518 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 2271 transitions. [2021-12-16 08:53:37,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 08:53:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2271 transitions. [2021-12-16 08:53:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 08:53:37,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:37,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:37,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-16 08:53:37,734 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 08:53:37,734 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash -515146363, now seen corresponding path program 1 times [2021-12-16 08:53:37,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:37,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141233329] [2021-12-16 08:53:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:37,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:37,736 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 08:53:37,738 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 08:53:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:38,028 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 08:53:38,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:38,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141233329] [2021-12-16 08:53:38,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141233329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:38,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:38,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:38,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576043913] [2021-12-16 08:53:38,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:38,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:38,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:38,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:38,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:38,030 INFO L87 Difference]: Start difference. First operand 1674 states and 2271 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 08:53:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:38,067 INFO L93 Difference]: Finished difference Result 1662 states and 2251 transitions. [2021-12-16 08:53:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2021-12-16 08:53:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:38,071 INFO L225 Difference]: With dead ends: 1662 [2021-12-16 08:53:38,071 INFO L226 Difference]: Without dead ends: 1662 [2021-12-16 08:53:38,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 08:53:38,072 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 1078 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:38,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 2411 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:53:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-12-16 08:53:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2021-12-16 08:53:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1148 states have (on average 1.9172473867595818) internal successors, (2201), 1648 states have internal predecessors, (2201), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 08:53:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2251 transitions. [2021-12-16 08:53:38,090 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2251 transitions. Word has length 52 [2021-12-16 08:53:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:38,090 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2251 transitions. [2021-12-16 08:53:38,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 08:53:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2251 transitions. [2021-12-16 08:53:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 08:53:38,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:38,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:53:38,102 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 08:53:38,300 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 08:53:38,300 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1189287633, now seen corresponding path program 1 times [2021-12-16 08:53:38,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:38,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920578884] [2021-12-16 08:53:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:38,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:38,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:38,303 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 08:53:38,312 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 08:53:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:53:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:38,625 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 08:53:38,631 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 08:53:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:53:39,028 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 12 treesize of output 14 [2021-12-16 08:53:39,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:53:39,037 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 08:53:39,050 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 08:53:39,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:39,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920578884] [2021-12-16 08:53:39,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920578884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:39,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:39,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:53:39,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011512912] [2021-12-16 08:53:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:39,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:39,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:39,051 INFO L87 Difference]: Start difference. First operand 1662 states and 2251 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 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 08:53:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:40,777 INFO L93 Difference]: Finished difference Result 1633 states and 2223 transitions. [2021-12-16 08:53:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2021-12-16 08:53:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:40,782 INFO L225 Difference]: With dead ends: 1633 [2021-12-16 08:53:40,782 INFO L226 Difference]: Without dead ends: 1633 [2021-12-16 08:53:40,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 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 08:53:40,783 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 833 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:40,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 888 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 08:53:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-12-16 08:53:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1250. [2021-12-16 08:53:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 779 states have (on average 1.8318356867779204) internal successors, (1427), 1239 states have internal predecessors, (1427), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 08:53:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1471 transitions. [2021-12-16 08:53:40,796 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1471 transitions. Word has length 60 [2021-12-16 08:53:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:40,796 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1471 transitions. [2021-12-16 08:53:40,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 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 08:53:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1471 transitions. [2021-12-16 08:53:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:53:40,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:40,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:40,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-16 08:53:41,008 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 08:53:41,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054235, now seen corresponding path program 1 times [2021-12-16 08:53:41,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316872633] [2021-12-16 08:53:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:41,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:41,010 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 08:53:41,012 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 08:53:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:41,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:53:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:41,309 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 08:53:41,322 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 13 treesize of output 9 [2021-12-16 08:53:41,343 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 24 treesize of output 12 [2021-12-16 08:53:41,350 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 08:53:41,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:41,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316872633] [2021-12-16 08:53:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316872633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:41,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:41,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:41,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347555096] [2021-12-16 08:53:41,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:41,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:53:41,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:53:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:53:41,351 INFO L87 Difference]: Start difference. First operand 1250 states and 1471 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 08:53:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:43,231 INFO L93 Difference]: Finished difference Result 1249 states and 1470 transitions. [2021-12-16 08:53:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:53:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-12-16 08:53:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:43,234 INFO L225 Difference]: With dead ends: 1249 [2021-12-16 08:53:43,234 INFO L226 Difference]: Without dead ends: 1249 [2021-12-16 08:53:43,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:53:43,235 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 4 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:43,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2957 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 08:53:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-12-16 08:53:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2021-12-16 08:53:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 779 states have (on average 1.8305519897304237) internal successors, (1426), 1238 states have internal predecessors, (1426), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 08:53:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1470 transitions. [2021-12-16 08:53:43,247 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1470 transitions. Word has length 65 [2021-12-16 08:53:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:43,247 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1470 transitions. [2021-12-16 08:53:43,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 08:53:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1470 transitions. [2021-12-16 08:53:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:53:43,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:43,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:43,258 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 08:53:43,457 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 08:53:43,458 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054234, now seen corresponding path program 1 times [2021-12-16 08:53:43,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:43,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369551709] [2021-12-16 08:53:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:43,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:43,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:43,460 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 08:53:43,460 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 08:53:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 08:53:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:43,763 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 08:53:43,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 08:53:43,791 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 13 treesize of output 9 [2021-12-16 08:53:43,827 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 21 treesize of output 9 [2021-12-16 08:53:43,831 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 19 treesize of output 7 [2021-12-16 08:53:43,842 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 08:53:43,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:43,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:43,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369551709] [2021-12-16 08:53:43,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369551709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:43,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:43,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:43,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056934536] [2021-12-16 08:53:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:53:43,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:53:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:53:43,843 INFO L87 Difference]: Start difference. First operand 1249 states and 1470 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 08:53:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:46,285 INFO L93 Difference]: Finished difference Result 1248 states and 1469 transitions. [2021-12-16 08:53:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:53:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-12-16 08:53:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:46,288 INFO L225 Difference]: With dead ends: 1248 [2021-12-16 08:53:46,288 INFO L226 Difference]: Without dead ends: 1248 [2021-12-16 08:53:46,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 08:53:46,289 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 2 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:46,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3018 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 08:53:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-12-16 08:53:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2021-12-16 08:53:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 778 states have (on average 1.8316195372750643) internal successors, (1425), 1237 states have internal predecessors, (1425), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 08:53:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1469 transitions. [2021-12-16 08:53:46,300 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1469 transitions. Word has length 65 [2021-12-16 08:53:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:46,300 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1469 transitions. [2021-12-16 08:53:46,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 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 08:53:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1469 transitions. [2021-12-16 08:53:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 08:53:46,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:46,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:46,310 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 08:53:46,510 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 08:53:46,510 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 827014060, now seen corresponding path program 1 times [2021-12-16 08:53:46,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206816598] [2021-12-16 08:53:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:46,512 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 08:53:46,513 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 08:53:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:53:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:46,842 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 08:53:46,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:53:46,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206816598] [2021-12-16 08:53:46,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206816598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:53:46,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:53:46,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:53:46,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376114313] [2021-12-16 08:53:46,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:53:46,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:53:46,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:53:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:53:46,844 INFO L87 Difference]: Start difference. First operand 1248 states and 1469 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 08:53:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:46,877 INFO L93 Difference]: Finished difference Result 1251 states and 1473 transitions. [2021-12-16 08:53:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:53:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2021-12-16 08:53:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:46,881 INFO L225 Difference]: With dead ends: 1251 [2021-12-16 08:53:46,881 INFO L226 Difference]: Without dead ends: 1251 [2021-12-16 08:53:46,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 08:53:46,882 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 2 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:46,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3373 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:53:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-16 08:53:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2021-12-16 08:53:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 780 states have (on average 1.8307692307692307) internal successors, (1428), 1240 states have internal predecessors, (1428), 22 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-16 08:53:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1473 transitions. [2021-12-16 08:53:46,904 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1473 transitions. Word has length 73 [2021-12-16 08:53:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:46,905 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1473 transitions. [2021-12-16 08:53:46,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 08:53:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1473 transitions. [2021-12-16 08:53:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 08:53:46,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:46,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:46,916 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 08:53:47,116 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 08:53:47,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 505961995, now seen corresponding path program 1 times [2021-12-16 08:53:47,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890834114] [2021-12-16 08:53:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:53:47,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:47,118 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 08:53:47,119 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 08:53:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:53:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:53:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:47,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:53:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:47,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:47,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890834114] [2021-12-16 08:53:47,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890834114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:53:47,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:53:47,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 08:53:47,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263105255] [2021-12-16 08:53:47,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:53:47,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:53:47,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:53:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:53:47,587 INFO L87 Difference]: Start difference. First operand 1251 states and 1473 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:47,711 INFO L93 Difference]: Finished difference Result 1263 states and 1490 transitions. [2021-12-16 08:53:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:53:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-12-16 08:53:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:47,714 INFO L225 Difference]: With dead ends: 1263 [2021-12-16 08:53:47,714 INFO L226 Difference]: Without dead ends: 1263 [2021-12-16 08:53:47,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-16 08:53:47,714 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 15 mSDsluCounter, 4491 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5618 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 5618 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:53:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-12-16 08:53:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1261. [2021-12-16 08:53:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 789 states have (on average 1.8288973384030418) internal successors, (1443), 1249 states have internal predecessors, (1443), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-16 08:53:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1488 transitions. [2021-12-16 08:53:47,730 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1488 transitions. Word has length 74 [2021-12-16 08:53:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1488 transitions. [2021-12-16 08:53:47,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1488 transitions. [2021-12-16 08:53:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 08:53:47,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:47,731 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:47,742 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 08:53:47,940 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 08:53:47,940 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash 279993196, now seen corresponding path program 2 times [2021-12-16 08:53:47,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:47,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195400036] [2021-12-16 08:53:47,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:53:47,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:47,942 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 08:53:47,945 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 08:53:48,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 08:53:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:53:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:53:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:48,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:53:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:48,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195400036] [2021-12-16 08:53:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195400036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:53:48,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:53:48,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 08:53:48,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106501261] [2021-12-16 08:53:48,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:53:48,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 08:53:48,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 08:53:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-16 08:53:48,688 INFO L87 Difference]: Start difference. First operand 1261 states and 1488 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:49,137 INFO L93 Difference]: Finished difference Result 1282 states and 1516 transitions. [2021-12-16 08:53:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 08:53:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2021-12-16 08:53:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:49,140 INFO L225 Difference]: With dead ends: 1282 [2021-12-16 08:53:49,140 INFO L226 Difference]: Without dead ends: 1278 [2021-12-16 08:53:49,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-12-16 08:53:49,140 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 62 mSDsluCounter, 5634 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6764 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:49,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 6764 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:53:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-12-16 08:53:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1270. [2021-12-16 08:53:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 798 states have (on average 1.8233082706766917) internal successors, (1455), 1258 states have internal predecessors, (1455), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-16 08:53:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1500 transitions. [2021-12-16 08:53:49,153 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1500 transitions. Word has length 77 [2021-12-16 08:53:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:49,153 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1500 transitions. [2021-12-16 08:53:49,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1500 transitions. [2021-12-16 08:53:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 08:53:49,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:49,154 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:49,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 08:53:49,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:53:49,364 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -183892212, now seen corresponding path program 3 times [2021-12-16 08:53:49,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:49,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392621430] [2021-12-16 08:53:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 08:53:49,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:49,366 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:53:49,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 08:53:49,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 08:53:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:53:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:53:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:50,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:53:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:50,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392621430] [2021-12-16 08:53:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392621430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:53:50,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:53:50,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-16 08:53:50,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886634657] [2021-12-16 08:53:50,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:53:50,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 08:53:50,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 08:53:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-16 08:53:50,855 INFO L87 Difference]: Start difference. First operand 1270 states and 1500 transitions. Second operand has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:53:53,535 INFO L93 Difference]: Finished difference Result 1312 states and 1562 transitions. [2021-12-16 08:53:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 08:53:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-12-16 08:53:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:53:53,537 INFO L225 Difference]: With dead ends: 1312 [2021-12-16 08:53:53,537 INFO L226 Difference]: Without dead ends: 1306 [2021-12-16 08:53:53,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 08:53:53,538 INFO L933 BasicCegarLoop]: 1135 mSDtfsCounter, 181 mSDsluCounter, 13562 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 14697 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:53:53,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 14697 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 08:53:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-12-16 08:53:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1288. [2021-12-16 08:53:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 816 states have (on average 1.8112745098039216) internal successors, (1478), 1276 states have internal predecessors, (1478), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-16 08:53:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1523 transitions. [2021-12-16 08:53:53,560 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1523 transitions. Word has length 83 [2021-12-16 08:53:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:53:53,560 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 1523 transitions. [2021-12-16 08:53:53,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:53:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1523 transitions. [2021-12-16 08:53:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 08:53:53,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:53:53,561 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:53:53,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-16 08:53:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:53:53,772 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:53:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:53:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 171030092, now seen corresponding path program 4 times [2021-12-16 08:53:53,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:53:53,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149572631] [2021-12-16 08:53:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 08:53:53,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:53:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:53:53,774 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:53:53,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 08:53:54,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 08:53:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:53:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 08:53:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:53:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:54,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:53:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:53:55,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:53:55,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149572631] [2021-12-16 08:53:55,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149572631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:53:55,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:53:55,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-16 08:53:55,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119879240] [2021-12-16 08:53:55,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:53:55,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 08:53:55,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:53:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 08:53:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 08:53:55,841 INFO L87 Difference]: Start difference. First operand 1288 states and 1523 transitions. Second operand has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:54:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:54:06,300 INFO L93 Difference]: Finished difference Result 1368 states and 1635 transitions. [2021-12-16 08:54:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 08:54:06,302 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 95 [2021-12-16 08:54:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:54:06,304 INFO L225 Difference]: With dead ends: 1368 [2021-12-16 08:54:06,304 INFO L226 Difference]: Without dead ends: 1364 [2021-12-16 08:54:06,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 08:54:06,307 INFO L933 BasicCegarLoop]: 1147 mSDtfsCounter, 369 mSDsluCounter, 27415 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 28562 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:54:06,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 28562 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:54:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-12-16 08:54:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1322. [2021-12-16 08:54:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 850 states have (on average 1.7929411764705883) internal successors, (1524), 1310 states have internal predecessors, (1524), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-12-16 08:54:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1569 transitions. [2021-12-16 08:54:06,323 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1569 transitions. Word has length 95 [2021-12-16 08:54:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:54:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1569 transitions. [2021-12-16 08:54:06,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.36) internal successors, (118), 50 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 08:54:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1569 transitions. [2021-12-16 08:54:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 08:54:06,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:54:06,325 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:54:06,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 08:54:06,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 08:54:06,526 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-12-16 08:54:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:54:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1801422612, now seen corresponding path program 5 times [2021-12-16 08:54:06,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:54:06,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075410748] [2021-12-16 08:54:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:54:06,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:54:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:54:06,528 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 08:54:06,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 08:54:07,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-16 08:54:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:54:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-16 08:54:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:54:07,786 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 08:54:07,894 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:54:07,894 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 08:54:07,915 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 13 treesize of output 9 [2021-12-16 08:54:07,991 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 13 [2021-12-16 08:54:08,277 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1913 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1913)))) is different from true [2021-12-16 08:54:08,389 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1916 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1916)))) is different from true [2021-12-16 08:54:08,453 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1918 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1918)))) is different from true [2021-12-16 08:54:08,476 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1919 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1919)))) is different from true [2021-12-16 08:54:08,684 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1925 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1925)))) is different from true [2021-12-16 08:54:08,881 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1931 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1931)))) is different from true [2021-12-16 08:54:08,977 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1934 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1934)))) is different from true [2021-12-16 08:54:09,088 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1938 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1938)))) is different from true [2021-12-16 08:54:09,350 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1946 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1946)))) is different from true [2021-12-16 08:54:09,588 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:54:09,588 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 37 treesize of output 38 [2021-12-16 08:54:09,645 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 34 treesize of output 16 [2021-12-16 08:54:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 595 trivial. 360 not checked. [2021-12-16 08:54:09,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:54:09,875 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1997 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1997) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd |c_ULTIMATE.start_main_~user~0#1.offset| (_ bv8 32)))) (_ bv1 1)))) is different from false [2021-12-16 08:54:09,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:54:09,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075410748] [2021-12-16 08:54:09,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075410748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 08:54:09,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009093855] [2021-12-16 08:54:09,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:54:09,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 08:54:09,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 08:54:09,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 08:54:09,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process