./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.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_SAX_test8-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca0a592612bf67ed64c0cb4dbe07151d7191a8039e0f3c4eacc12cd10ecaa237 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:54:48,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:54:48,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:54:48,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:54:48,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:54:48,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:54:48,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:54:48,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:54:48,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:54:48,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:54:48,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:54:48,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:54:48,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:54:48,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:54:48,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:54:48,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:54:48,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:54:48,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:54:48,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:54:48,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:54:48,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:54:48,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:54:48,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:54:48,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:54:48,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:54:48,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:54:48,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:54:48,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:54:48,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:54:48,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:54:48,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:54:48,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:54:48,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:54:48,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:54:48,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:54:48,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:54:48,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:54:48,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:54:48,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:54:48,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:54:48,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:54:48,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 08:54:48,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:54:48,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:54:48,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:54:48,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:54:48,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:54:48,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:54:48,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:54:48,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:54:48,793 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:54:48,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:54:48,794 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:54:48,795 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:54:48,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:54:48,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:54:48,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:54:48,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:54:48,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:54:48,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:54:48,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:54:48,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:54:48,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:54:48,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:54:48,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 08:54:48,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 08:54:48,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:54:48,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca0a592612bf67ed64c0cb4dbe07151d7191a8039e0f3c4eacc12cd10ecaa237 [2021-12-16 08:54:48,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:54:49,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:54:49,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:54:49,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:54:49,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:54:49,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i [2021-12-16 08:54:49,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17388ea85/149217d2e205446f8b9a1bd79c94f448/FLAGb635bcd1a [2021-12-16 08:54:49,461 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:54:49,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i [2021-12-16 08:54:49,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17388ea85/149217d2e205446f8b9a1bd79c94f448/FLAGb635bcd1a [2021-12-16 08:54:49,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17388ea85/149217d2e205446f8b9a1bd79c94f448 [2021-12-16 08:54:49,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:54:49,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:54:49,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:54:49,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:54:49,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:54:49,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:54:49" (1/1) ... [2021-12-16 08:54:49,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2a68d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:49, skipping insertion in model container [2021-12-16 08:54:49,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:54:49" (1/1) ... [2021-12-16 08:54:49,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:54:49,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:54:50,125 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[33021,33034] [2021-12-16 08:54:50,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[45234,45247] [2021-12-16 08:54:50,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:54:50,238 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 08:54:50,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cf6585b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:50, skipping insertion in model container [2021-12-16 08:54:50,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:54:50,239 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 08:54:50,241 INFO L158 Benchmark]: Toolchain (without parser) took 420.25ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 58.7MB in the beginning and 76.1MB in the end (delta: -17.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:54:50,242 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 92.3MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 08:54:50,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 416.09ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 58.4MB in the beginning and 76.1MB in the end (delta: -17.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 08:54:50,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 92.3MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 416.09ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 58.4MB in the beginning and 76.1MB in the end (delta: -17.7MB). 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_SAX_test8-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca0a592612bf67ed64c0cb4dbe07151d7191a8039e0f3c4eacc12cd10ecaa237 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 08:54:51,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 08:54:51,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 08:54:51,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 08:54:51,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 08:54:51,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 08:54:51,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 08:54:51,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 08:54:51,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 08:54:51,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 08:54:51,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 08:54:51,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 08:54:51,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 08:54:51,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 08:54:51,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 08:54:51,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 08:54:51,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 08:54:51,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 08:54:51,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 08:54:51,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 08:54:51,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 08:54:51,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 08:54:51,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 08:54:51,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 08:54:51,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 08:54:51,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 08:54:51,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 08:54:51,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 08:54:51,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 08:54:51,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 08:54:51,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 08:54:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 08:54:51,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 08:54:51,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 08:54:51,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 08:54:51,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 08:54:51,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 08:54:51,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 08:54:51,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 08:54:51,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 08:54:51,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 08:54:51,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 08:54:51,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 08:54:51,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 08:54:51,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 08:54:51,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 08:54:51,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 08:54:51,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 08:54:51,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 08:54:51,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 08:54:51,968 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 08:54:51,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 08:54:51,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 08:54:51,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 08:54:51,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 08:54:51,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 08:54:51,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 08:54:51,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 08:54:51,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:54:51,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 08:54:51,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 08:54:51,972 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 08:54:51,972 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 08:54:51,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 08:54:51,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 08:54:51,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca0a592612bf67ed64c0cb4dbe07151d7191a8039e0f3c4eacc12cd10ecaa237 [2021-12-16 08:54:52,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 08:54:52,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 08:54:52,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 08:54:52,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 08:54:52,255 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 08:54:52,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i [2021-12-16 08:54:52,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98996d1b1/d5369fb11ab94a19959914c735b30f30/FLAG6f286b4c5 [2021-12-16 08:54:52,802 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 08:54:52,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i [2021-12-16 08:54:52,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98996d1b1/d5369fb11ab94a19959914c735b30f30/FLAG6f286b4c5 [2021-12-16 08:54:53,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98996d1b1/d5369fb11ab94a19959914c735b30f30 [2021-12-16 08:54:53,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 08:54:53,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 08:54:53,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 08:54:53,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 08:54:53,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 08:54:53,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:54:53" (1/1) ... [2021-12-16 08:54:53,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5b376d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:53, skipping insertion in model container [2021-12-16 08:54:53,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:54:53" (1/1) ... [2021-12-16 08:54:53,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 08:54:53,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:54:53,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[33021,33034] [2021-12-16 08:54:53,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[45234,45247] [2021-12-16 08:54:53,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:54:53,798 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 08:54:53,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 08:54:53,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[33021,33034] [2021-12-16 08:54:53,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[45234,45247] [2021-12-16 08:54:53,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:54:53,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 08:54:53,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[33021,33034] [2021-12-16 08:54:53,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test8-1.i[45234,45247] [2021-12-16 08:54:53,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 08:54:54,008 INFO L208 MainTranslator]: Completed translation [2021-12-16 08:54:54,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54 WrapperNode [2021-12-16 08:54:54,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 08:54:54,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 08:54:54,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 08:54:54,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 08:54:54,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,111 INFO L137 Inliner]: procedures = 180, calls = 297, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1011 [2021-12-16 08:54:54,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 08:54:54,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 08:54:54,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 08:54:54,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 08:54:54,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 08:54:54,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 08:54:54,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 08:54:54,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 08:54:54,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (1/1) ... [2021-12-16 08:54:54,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 08:54:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 08:54:54,277 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 08:54:54,290 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 08:54:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-16 08:54:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 08:54:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 08:54:54,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 08:54:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 08:54:54,313 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 08:54:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-12-16 08:54:54,313 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-12-16 08:54:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 08:54:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 08:54:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 08:54:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 08:54:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 08:54:54,514 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 08:54:54,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 08:54:54,518 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-16 08:54:57,065 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 08:54:57,097 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 08:54:57,097 INFO L301 CfgBuilder]: Removed 62 assume(true) statements. [2021-12-16 08:54:57,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:54:57 BoogieIcfgContainer [2021-12-16 08:54:57,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 08:54:57,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 08:54:57,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 08:54:57,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 08:54:57,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:54:53" (1/3) ... [2021-12-16 08:54:57,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55029522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:54:57, skipping insertion in model container [2021-12-16 08:54:57,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:54:54" (2/3) ... [2021-12-16 08:54:57,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55029522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:54:57, skipping insertion in model container [2021-12-16 08:54:57,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:54:57" (3/3) ... [2021-12-16 08:54:57,109 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test8-1.i [2021-12-16 08:54:57,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 08:54:57,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 536 error locations. [2021-12-16 08:54:57,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 08:54:57,160 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 08:54:57,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 536 error locations. [2021-12-16 08:54:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 1097 states, 540 states have (on average 2.240740740740741) internal successors, (1210), 1088 states have internal predecessors, (1210), 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 08:54:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:54:57,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:54:57,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:54:57,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:54:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:54:57,210 INFO L85 PathProgramCache]: Analyzing trace with hash 132136, now seen corresponding path program 1 times [2021-12-16 08:54:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:54:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595821846] [2021-12-16 08:54:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:54:57,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:54:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:54:57,220 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 08:54:57,264 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 08:54:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:54:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:54:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:54:57,452 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 08:54:57,463 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 08:54:57,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:54:57,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:54:57,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595821846] [2021-12-16 08:54:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595821846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:54:57,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:54:57,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:54:57,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037749044] [2021-12-16 08:54:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:54:57,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:54:57,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:54:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:54:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:54:57,516 INFO L87 Difference]: Start difference. First operand has 1097 states, 540 states have (on average 2.240740740740741) internal successors, (1210), 1088 states have internal predecessors, (1210), 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 08:54:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:54:58,562 INFO L93 Difference]: Finished difference Result 1100 states and 1186 transitions. [2021-12-16 08:54:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:54:58,564 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 08:54:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:54:58,586 INFO L225 Difference]: With dead ends: 1100 [2021-12-16 08:54:58,587 INFO L226 Difference]: Without dead ends: 1098 [2021-12-16 08:54:58,588 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 08:54:58,591 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 971 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 08:54:58,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 825 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 08:54:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-12-16 08:54:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1086. [2021-12-16 08:54:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 543 states have (on average 2.0902394106813995) internal successors, (1135), 1076 states have internal predecessors, (1135), 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 08:54:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1177 transitions. [2021-12-16 08:54:58,665 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1177 transitions. Word has length 3 [2021-12-16 08:54:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:54:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1177 transitions. [2021-12-16 08:54:58,666 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 08:54:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1177 transitions. [2021-12-16 08:54:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 08:54:58,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:54:58,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 08:54:58,679 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 08:54:58,873 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 08:54:58,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:54:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:54:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash 132137, now seen corresponding path program 1 times [2021-12-16 08:54:58,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:54:58,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844797295] [2021-12-16 08:54:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:54:58,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:54:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:54:58,876 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 08:54:58,878 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 08:54:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:54:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:54:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:54:59,000 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 08:54:59,009 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 08:54:59,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:54:59,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:54:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844797295] [2021-12-16 08:54:59,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844797295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:54:59,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:54:59,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:54:59,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486227624] [2021-12-16 08:54:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:54:59,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:54:59,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:54:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:54:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:54:59,017 INFO L87 Difference]: Start difference. First operand 1086 states and 1177 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 08:55:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:00,904 INFO L93 Difference]: Finished difference Result 1479 states and 1600 transitions. [2021-12-16 08:55:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:55:00,904 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 08:55:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:00,910 INFO L225 Difference]: With dead ends: 1479 [2021-12-16 08:55:00,910 INFO L226 Difference]: Without dead ends: 1479 [2021-12-16 08:55:00,910 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 08:55:00,911 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 421 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:00,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 1612 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 08:55:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-12-16 08:55:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1290. [2021-12-16 08:55:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 747 states have (on average 2.0803212851405624) internal successors, (1554), 1279 states have internal predecessors, (1554), 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 08:55:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1598 transitions. [2021-12-16 08:55:00,944 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1598 transitions. Word has length 3 [2021-12-16 08:55:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:00,944 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1598 transitions. [2021-12-16 08:55:00,944 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 08:55:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1598 transitions. [2021-12-16 08:55:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 08:55:00,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:00,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:55:00,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 08:55:01,151 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 08:55:01,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1773817970, now seen corresponding path program 1 times [2021-12-16 08:55:01,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816391209] [2021-12-16 08:55:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:01,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:01,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:01,155 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 08:55:01,156 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 08:55:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:01,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:55:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:01,301 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 08:55:01,306 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 08:55:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:55:01,372 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 08:55:01,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:55:01,380 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 08:55:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 08:55:01,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:01,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816391209] [2021-12-16 08:55:01,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816391209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:01,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:01,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:01,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163958013] [2021-12-16 08:55:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:01,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:01,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:01,399 INFO L87 Difference]: Start difference. First operand 1290 states and 1598 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 08:55:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:02,975 INFO L93 Difference]: Finished difference Result 1295 states and 1601 transitions. [2021-12-16 08:55:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:02,976 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 08:55:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:02,979 INFO L225 Difference]: With dead ends: 1295 [2021-12-16 08:55:02,979 INFO L226 Difference]: Without dead ends: 1295 [2021-12-16 08:55:02,980 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 08:55:02,981 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 1073 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:02,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 591 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 08:55:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-12-16 08:55:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1075. [2021-12-16 08:55:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 543 states have (on average 2.0681399631675874) internal successors, (1123), 1065 states have internal predecessors, (1123), 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 08:55:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1165 transitions. [2021-12-16 08:55:03,004 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1165 transitions. Word has length 7 [2021-12-16 08:55:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:03,005 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1165 transitions. [2021-12-16 08:55:03,005 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 08:55:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1165 transitions. [2021-12-16 08:55:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:55:03,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:03,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:55:03,025 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 08:55:03,213 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 08:55:03,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash -846217710, now seen corresponding path program 1 times [2021-12-16 08:55:03,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:03,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9029656] [2021-12-16 08:55:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:03,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:03,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:03,216 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 08:55:03,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 08:55:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:03,354 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 08:55:03,362 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 08:55:03,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:03,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:03,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9029656] [2021-12-16 08:55:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9029656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:03,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:03,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:55:03,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333982093] [2021-12-16 08:55:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:55:03,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:55:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:55:03,364 INFO L87 Difference]: Start difference. First operand 1075 states and 1165 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 08:55:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:04,729 INFO L93 Difference]: Finished difference Result 1402 states and 1519 transitions. [2021-12-16 08:55:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:55:04,732 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 08:55:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:04,736 INFO L225 Difference]: With dead ends: 1402 [2021-12-16 08:55:04,736 INFO L226 Difference]: Without dead ends: 1402 [2021-12-16 08:55:04,737 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 08:55:04,739 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 988 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:04,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 1298 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 08:55:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-12-16 08:55:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1028. [2021-12-16 08:55:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 543 states have (on average 1.9797421731123388) internal successors, (1075), 1018 states have internal predecessors, (1075), 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 08:55:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1117 transitions. [2021-12-16 08:55:04,760 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1117 transitions. Word has length 8 [2021-12-16 08:55:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1117 transitions. [2021-12-16 08:55:04,761 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 08:55:04,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1117 transitions. [2021-12-16 08:55:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 08:55:04,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:04,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:55:04,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-16 08:55:04,968 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 08:55:04,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash -846217709, now seen corresponding path program 1 times [2021-12-16 08:55:04,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:04,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143731443] [2021-12-16 08:55:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:04,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:04,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:04,973 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 08:55:04,975 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 08:55:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:55:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:05,081 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 08:55:05,097 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 08:55:05,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:05,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:05,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143731443] [2021-12-16 08:55:05,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143731443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:05,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:05,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 08:55:05,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486792894] [2021-12-16 08:55:05,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:05,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:55:05,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:55:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:55:05,100 INFO L87 Difference]: Start difference. First operand 1028 states and 1117 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 08:55:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:06,852 INFO L93 Difference]: Finished difference Result 1497 states and 1619 transitions. [2021-12-16 08:55:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:55:06,853 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 08:55:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:06,857 INFO L225 Difference]: With dead ends: 1497 [2021-12-16 08:55:06,857 INFO L226 Difference]: Without dead ends: 1497 [2021-12-16 08:55:06,857 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 08:55:06,858 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 686 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:06,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1698 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-16 08:55:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-16 08:55:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1270. [2021-12-16 08:55:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 793 states have (on average 1.978562421185372) internal successors, (1569), 1258 states have internal predecessors, (1569), 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 08:55:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1615 transitions. [2021-12-16 08:55:06,875 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1615 transitions. Word has length 8 [2021-12-16 08:55:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:06,876 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1615 transitions. [2021-12-16 08:55:06,876 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 08:55:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1615 transitions. [2021-12-16 08:55:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 08:55:06,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:06,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 08:55:06,893 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 08:55:07,084 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 08:55:07,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr534ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -652228184, now seen corresponding path program 1 times [2021-12-16 08:55:07,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:07,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900359314] [2021-12-16 08:55:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:07,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:07,087 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 08:55:07,088 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 08:55:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:55:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:55:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:55:07,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 08:55:07,292 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-12-16 08:55:07,292 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 08:55:07,372 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-16 08:55:07,372 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 08:55:07,388 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 08:55:07,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:07,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:07,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900359314] [2021-12-16 08:55:07,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900359314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:07,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:07,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:07,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051429908] [2021-12-16 08:55:07,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:07,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:07,392 INFO L87 Difference]: Start difference. First operand 1270 states and 1615 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 08:55:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:08,343 INFO L93 Difference]: Finished difference Result 1784 states and 2339 transitions. [2021-12-16 08:55:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 08:55:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:08,349 INFO L225 Difference]: With dead ends: 1784 [2021-12-16 08:55:08,349 INFO L226 Difference]: Without dead ends: 1784 [2021-12-16 08:55:08,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 08:55:08,350 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 356 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 3028 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 08:55:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 3028 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 08:55:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-12-16 08:55:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1272. [2021-12-16 08:55:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 795 states have (on average 1.9761006289308176) internal successors, (1571), 1260 states have internal predecessors, (1571), 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 08:55:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1617 transitions. [2021-12-16 08:55:08,373 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1617 transitions. Word has length 10 [2021-12-16 08:55:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1617 transitions. [2021-12-16 08:55:08,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 08:55:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1617 transitions. [2021-12-16 08:55:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 08:55:08,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:08,375 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 08:55:08,393 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 08:55:08,583 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 08:55:08,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash -413650658, now seen corresponding path program 1 times [2021-12-16 08:55:08,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:08,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495057671] [2021-12-16 08:55:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:08,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:08,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:08,601 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 08:55:08,602 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 08:55:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 08:55:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:08,758 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 08:55:08,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:08,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495057671] [2021-12-16 08:55:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495057671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:08,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:08,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908092727] [2021-12-16 08:55:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:55:08,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:55:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:55:08,760 INFO L87 Difference]: Start difference. First operand 1272 states and 1617 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 08:55:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:08,780 INFO L93 Difference]: Finished difference Result 1241 states and 1585 transitions. [2021-12-16 08:55:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:55:08,781 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 08:55:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:08,784 INFO L225 Difference]: With dead ends: 1241 [2021-12-16 08:55:08,784 INFO L226 Difference]: Without dead ends: 1241 [2021-12-16 08:55:08,784 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 08:55:08,785 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 964 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1144 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 08:55:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 1144 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:55:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-12-16 08:55:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1230. [2021-12-16 08:55:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 777 states have (on average 1.9665379665379665) internal successors, (1528), 1218 states have internal predecessors, (1528), 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 08:55:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1574 transitions. [2021-12-16 08:55:08,799 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1574 transitions. Word has length 18 [2021-12-16 08:55:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:08,799 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1574 transitions. [2021-12-16 08:55:08,800 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 08:55:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1574 transitions. [2021-12-16 08:55:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 08:55:08,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:08,800 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 08:55:08,808 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 08:55:09,007 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 08:55:09,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1913675577, now seen corresponding path program 1 times [2021-12-16 08:55:09,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:09,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179699962] [2021-12-16 08:55:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:09,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:09,010 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 08:55:09,012 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 08:55:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:09,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:09,226 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 08:55:09,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:09,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179699962] [2021-12-16 08:55:09,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179699962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:09,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:09,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:09,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136498360] [2021-12-16 08:55:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:09,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:09,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:09,229 INFO L87 Difference]: Start difference. First operand 1230 states and 1574 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 08:55:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:09,307 INFO L93 Difference]: Finished difference Result 1220 states and 1557 transitions. [2021-12-16 08:55:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:09,308 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 08:55:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:09,311 INFO L225 Difference]: With dead ends: 1220 [2021-12-16 08:55:09,311 INFO L226 Difference]: Without dead ends: 1220 [2021-12-16 08:55:09,311 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 08:55:09,312 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 935 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2099 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 08:55:09,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:55:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-12-16 08:55:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1208. [2021-12-16 08:55:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 769 states have (on average 1.9492847854356308) internal successors, (1499), 1196 states have internal predecessors, (1499), 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 08:55:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1545 transitions. [2021-12-16 08:55:09,341 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1545 transitions. Word has length 20 [2021-12-16 08:55:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:09,341 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1545 transitions. [2021-12-16 08:55:09,341 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 08:55:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1545 transitions. [2021-12-16 08:55:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:55:09,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:09,342 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 08:55:09,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 08:55:09,552 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 08:55:09,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753126, now seen corresponding path program 1 times [2021-12-16 08:55:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:09,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006814271] [2021-12-16 08:55:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:09,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:09,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:09,559 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 08:55:09,560 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 08:55:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:55:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:09,706 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 08:55:09,789 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 08:55:09,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:09,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006814271] [2021-12-16 08:55:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006814271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:09,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:09,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:09,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241766945] [2021-12-16 08:55:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:09,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:09,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:09,791 INFO L87 Difference]: Start difference. First operand 1208 states and 1545 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 08:55:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:11,166 INFO L93 Difference]: Finished difference Result 1796 states and 2367 transitions. [2021-12-16 08:55:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:11,166 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 08:55:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:11,171 INFO L225 Difference]: With dead ends: 1796 [2021-12-16 08:55:11,171 INFO L226 Difference]: Without dead ends: 1796 [2021-12-16 08:55:11,171 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 08:55:11,171 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 2102 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:11,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 995 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 08:55:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-12-16 08:55:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1204. [2021-12-16 08:55:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 769 states have (on average 1.9440832249674902) internal successors, (1495), 1192 states have internal predecessors, (1495), 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 08:55:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1541 transitions. [2021-12-16 08:55:11,187 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1541 transitions. Word has length 34 [2021-12-16 08:55:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:11,188 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1541 transitions. [2021-12-16 08:55:11,188 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 08:55:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1541 transitions. [2021-12-16 08:55:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 08:55:11,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:11,189 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 08:55:11,201 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 08:55:11,396 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 08:55:11,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753127, now seen corresponding path program 1 times [2021-12-16 08:55:11,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:11,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931278147] [2021-12-16 08:55:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:11,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:11,398 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 08:55:11,400 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 08:55:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 08:55:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:11,570 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 08:55:11,769 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 08:55:11,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:11,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931278147] [2021-12-16 08:55:11,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931278147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:11,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:11,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500908495] [2021-12-16 08:55:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:11,771 INFO L87 Difference]: Start difference. First operand 1204 states and 1541 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 08:55:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:13,884 INFO L93 Difference]: Finished difference Result 1438 states and 1552 transitions. [2021-12-16 08:55:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:13,885 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 08:55:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:13,889 INFO L225 Difference]: With dead ends: 1438 [2021-12-16 08:55:13,889 INFO L226 Difference]: Without dead ends: 1438 [2021-12-16 08:55:13,889 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 08:55:13,889 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1176 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 1729 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 08:55:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-12-16 08:55:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1200. [2021-12-16 08:55:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 769 states have (on average 1.9388816644993498) internal successors, (1491), 1188 states have internal predecessors, (1491), 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 08:55:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1537 transitions. [2021-12-16 08:55:13,902 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1537 transitions. Word has length 34 [2021-12-16 08:55:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:13,904 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1537 transitions. [2021-12-16 08:55:13,904 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 08:55:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1537 transitions. [2021-12-16 08:55:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 08:55:13,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:13,908 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] [2021-12-16 08:55:13,925 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 08:55:14,115 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 08:55:14,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1045534242, now seen corresponding path program 1 times [2021-12-16 08:55:14,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790036565] [2021-12-16 08:55:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:14,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:14,118 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 08:55:14,140 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 08:55:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:14,393 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 08:55:14,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:14,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:14,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790036565] [2021-12-16 08:55:14,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790036565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:14,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:14,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:14,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972842790] [2021-12-16 08:55:14,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:14,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:14,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:14,395 INFO L87 Difference]: Start difference. First operand 1200 states and 1537 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 08:55:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:14,435 INFO L93 Difference]: Finished difference Result 1205 states and 1538 transitions. [2021-12-16 08:55:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 49 [2021-12-16 08:55:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:14,438 INFO L225 Difference]: With dead ends: 1205 [2021-12-16 08:55:14,439 INFO L226 Difference]: Without dead ends: 1205 [2021-12-16 08:55:14,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 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 08:55:14,439 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 911 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 2077 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 08:55:14,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 2077 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:55:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-12-16 08:55:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1194. [2021-12-16 08:55:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 763 states have (on average 1.9410222804718218) internal successors, (1481), 1182 states have internal predecessors, (1481), 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 08:55:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1527 transitions. [2021-12-16 08:55:14,453 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1527 transitions. Word has length 49 [2021-12-16 08:55:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:14,453 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1527 transitions. [2021-12-16 08:55:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 08:55:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1527 transitions. [2021-12-16 08:55:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 08:55:14,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:14,454 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] [2021-12-16 08:55:14,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-16 08:55:14,662 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 08:55:14,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -551406574, now seen corresponding path program 1 times [2021-12-16 08:55:14,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097348652] [2021-12-16 08:55:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:14,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:14,665 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 08:55:14,667 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 08:55:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:14,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:15,103 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 08:55:15,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:15,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097348652] [2021-12-16 08:55:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097348652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:15,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:15,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:15,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863583310] [2021-12-16 08:55:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 08:55:15,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 08:55:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 08:55:15,105 INFO L87 Difference]: Start difference. First operand 1194 states and 1527 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 08:55:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:15,281 INFO L93 Difference]: Finished difference Result 1736 states and 2264 transitions. [2021-12-16 08:55:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 08:55:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-12-16 08:55:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:15,286 INFO L225 Difference]: With dead ends: 1736 [2021-12-16 08:55:15,286 INFO L226 Difference]: Without dead ends: 1736 [2021-12-16 08:55:15,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 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 08:55:15,287 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 407 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:15,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2068 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:55:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-12-16 08:55:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1557. [2021-12-16 08:55:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1124 states have (on average 1.9225978647686832) internal successors, (2161), 1543 states have internal predecessors, (2161), 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 08:55:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2211 transitions. [2021-12-16 08:55:15,305 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2211 transitions. Word has length 57 [2021-12-16 08:55:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:15,305 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 2211 transitions. [2021-12-16 08:55:15,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 08:55:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2211 transitions. [2021-12-16 08:55:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 08:55:15,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:15,306 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 08:55:15,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 08:55:15,516 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 08:55:15,516 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1189287633, now seen corresponding path program 1 times [2021-12-16 08:55:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560007070] [2021-12-16 08:55:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:15,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:15,532 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 08:55:15,533 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 08:55:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 08:55:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:15,824 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 08:55:15,828 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 08:55:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 08:55:16,350 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 08:55:16,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 08:55:16,356 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 08:55:16,368 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 08:55:16,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:16,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560007070] [2021-12-16 08:55:16,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560007070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:16,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:16,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 08:55:16,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112594210] [2021-12-16 08:55:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:16,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:16,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:16,371 INFO L87 Difference]: Start difference. First operand 1557 states and 2211 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 08:55:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:17,718 INFO L93 Difference]: Finished difference Result 1528 states and 2183 transitions. [2021-12-16 08:55:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:17,718 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 08:55:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:17,722 INFO L225 Difference]: With dead ends: 1528 [2021-12-16 08:55:17,722 INFO L226 Difference]: Without dead ends: 1528 [2021-12-16 08:55:17,722 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 08:55:17,723 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 877 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:17,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 528 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 08:55:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-12-16 08:55:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1109. [2021-12-16 08:55:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 719 states have (on average 1.8094575799721835) internal successors, (1301), 1098 states have internal predecessors, (1301), 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 08:55:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1345 transitions. [2021-12-16 08:55:17,755 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1345 transitions. Word has length 60 [2021-12-16 08:55:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1345 transitions. [2021-12-16 08:55:17,756 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 08:55:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1345 transitions. [2021-12-16 08:55:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:55:17,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:17,758 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 08:55:17,779 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 08:55:17,968 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 08:55:17,968 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054235, now seen corresponding path program 1 times [2021-12-16 08:55:17,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023925759] [2021-12-16 08:55:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:17,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:17,970 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 08:55:17,972 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 08:55:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:55:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:18,283 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 08:55:18,295 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 08:55:18,316 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 08:55:18,325 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 08:55:18,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:18,325 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023925759] [2021-12-16 08:55:18,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023925759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:18,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:18,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:18,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741832960] [2021-12-16 08:55:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:18,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:55:18,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:55:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:55:18,327 INFO L87 Difference]: Start difference. First operand 1109 states and 1345 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 08:55:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:19,973 INFO L93 Difference]: Finished difference Result 1108 states and 1344 transitions. [2021-12-16 08:55:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:55:19,974 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 08:55:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:19,976 INFO L225 Difference]: With dead ends: 1108 [2021-12-16 08:55:19,976 INFO L226 Difference]: Without dead ends: 1108 [2021-12-16 08:55:19,977 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 08:55:19,977 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 4 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:19,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2532 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 08:55:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-16 08:55:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1108. [2021-12-16 08:55:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 719 states have (on average 1.8080667593880388) internal successors, (1300), 1097 states have internal predecessors, (1300), 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 08:55:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1344 transitions. [2021-12-16 08:55:19,988 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1344 transitions. Word has length 65 [2021-12-16 08:55:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:19,988 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1344 transitions. [2021-12-16 08:55:19,988 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 08:55:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1344 transitions. [2021-12-16 08:55:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 08:55:19,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:19,989 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 08:55:20,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 08:55:20,199 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 08:55:20,199 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054234, now seen corresponding path program 1 times [2021-12-16 08:55:20,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967885004] [2021-12-16 08:55:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:20,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:20,201 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 08:55:20,203 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 08:55:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:20,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 08:55:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:20,506 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 08:55:20,519 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 08:55:20,523 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 08:55:20,550 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 08:55:20,553 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 08:55:20,562 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 08:55:20,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:20,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967885004] [2021-12-16 08:55:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967885004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:20,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:20,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218514514] [2021-12-16 08:55:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 08:55:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 08:55:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 08:55:20,563 INFO L87 Difference]: Start difference. First operand 1108 states and 1344 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 08:55:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:22,424 INFO L93 Difference]: Finished difference Result 1107 states and 1343 transitions. [2021-12-16 08:55:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 08:55:22,425 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 08:55:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:22,428 INFO L225 Difference]: With dead ends: 1107 [2021-12-16 08:55:22,428 INFO L226 Difference]: Without dead ends: 1107 [2021-12-16 08:55:22,428 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 08:55:22,428 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 2 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:22,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2577 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 08:55:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-12-16 08:55:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1107. [2021-12-16 08:55:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 718 states have (on average 1.809192200557103) internal successors, (1299), 1096 states have internal predecessors, (1299), 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 08:55:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1343 transitions. [2021-12-16 08:55:22,462 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1343 transitions. Word has length 65 [2021-12-16 08:55:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1343 transitions. [2021-12-16 08:55:22,463 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 08:55:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1343 transitions. [2021-12-16 08:55:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 08:55:22,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:22,473 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 08:55:22,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-16 08:55:22,674 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 08:55:22,674 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1441347596, now seen corresponding path program 1 times [2021-12-16 08:55:22,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554280601] [2021-12-16 08:55:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:22,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:22,689 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 08:55:22,696 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 08:55:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 08:55:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:23,049 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 08:55:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 08:55:23,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554280601] [2021-12-16 08:55:23,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554280601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 08:55:23,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 08:55:23,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 08:55:23,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789427392] [2021-12-16 08:55:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 08:55:23,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 08:55:23,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 08:55:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 08:55:23,052 INFO L87 Difference]: Start difference. First operand 1107 states and 1343 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 08:55:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:23,083 INFO L93 Difference]: Finished difference Result 1110 states and 1347 transitions. [2021-12-16 08:55:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 08:55:23,084 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 08:55:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:23,090 INFO L225 Difference]: With dead ends: 1110 [2021-12-16 08:55:23,091 INFO L226 Difference]: Without dead ends: 1110 [2021-12-16 08:55:23,091 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 08:55:23,095 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 2 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2872 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 08:55:23,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2872 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 08:55:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-12-16 08:55:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-12-16 08:55:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 720 states have (on average 1.8083333333333333) internal successors, (1302), 1099 states have internal predecessors, (1302), 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 08:55:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1347 transitions. [2021-12-16 08:55:23,117 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1347 transitions. Word has length 73 [2021-12-16 08:55:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1347 transitions. [2021-12-16 08:55:23,118 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 08:55:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1347 transitions. [2021-12-16 08:55:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 08:55:23,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:23,119 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 08:55:23,141 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 08:55:23,329 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 08:55:23,329 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1660884519, now seen corresponding path program 1 times [2021-12-16 08:55:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615363816] [2021-12-16 08:55:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 08:55:23,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:23,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:23,331 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 08:55:23,332 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 08:55:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 08:55:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 08:55:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:23,684 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 08:55:23,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:55:23,857 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 08:55:23,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615363816] [2021-12-16 08:55:23,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615363816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:55:23,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:55:23,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 08:55:23,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695773074] [2021-12-16 08:55:23,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:55:23,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 08:55:23,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 08:55:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 08:55:23,860 INFO L87 Difference]: Start difference. First operand 1110 states and 1347 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 08:55:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:23,999 INFO L93 Difference]: Finished difference Result 1122 states and 1364 transitions. [2021-12-16 08:55:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 08:55:24,000 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 08:55:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:24,003 INFO L225 Difference]: With dead ends: 1122 [2021-12-16 08:55:24,003 INFO L226 Difference]: Without dead ends: 1122 [2021-12-16 08:55:24,004 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 08:55:24,004 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 13 mSDsluCounter, 4775 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5735 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:24,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 5735 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 08:55:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-12-16 08:55:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2021-12-16 08:55:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 729 states have (on average 1.8065843621399178) internal successors, (1317), 1108 states have internal predecessors, (1317), 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 08:55:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1362 transitions. [2021-12-16 08:55:24,020 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1362 transitions. Word has length 74 [2021-12-16 08:55:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:24,020 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1362 transitions. [2021-12-16 08:55:24,021 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 08:55:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1362 transitions. [2021-12-16 08:55:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 08:55:24,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:24,025 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 08:55:24,046 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 08:55:24,235 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 08:55:24,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash 925745996, now seen corresponding path program 2 times [2021-12-16 08:55:24,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5895663] [2021-12-16 08:55:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 08:55:24,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:24,237 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 08:55:24,238 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 08:55:24,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 08:55:24,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:55:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 08:55:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:24,815 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 08:55:24,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:55:24,993 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 08:55:24,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5895663] [2021-12-16 08:55:24,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5895663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:55:24,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:55:24,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 08:55:24,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940094700] [2021-12-16 08:55:24,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:55:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 08:55:24,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 08:55:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-16 08:55:24,995 INFO L87 Difference]: Start difference. First operand 1120 states and 1362 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 08:55:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:25,441 INFO L93 Difference]: Finished difference Result 1141 states and 1390 transitions. [2021-12-16 08:55:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 08:55:25,442 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 08:55:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:25,445 INFO L225 Difference]: With dead ends: 1141 [2021-12-16 08:55:25,445 INFO L226 Difference]: Without dead ends: 1137 [2021-12-16 08:55:25,445 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 08:55:25,446 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 56 mSDsluCounter, 4798 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:25,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 5761 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 08:55:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-16 08:55:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1129. [2021-12-16 08:55:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 738 states have (on average 1.8008130081300813) internal successors, (1329), 1117 states have internal predecessors, (1329), 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 08:55:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1374 transitions. [2021-12-16 08:55:25,475 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1374 transitions. Word has length 77 [2021-12-16 08:55:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:25,475 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1374 transitions. [2021-12-16 08:55:25,475 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 08:55:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1374 transitions. [2021-12-16 08:55:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 08:55:25,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:25,476 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 08:55:25,492 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 08:55:25,687 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 08:55:25,688 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -181581780, now seen corresponding path program 3 times [2021-12-16 08:55:25,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071383849] [2021-12-16 08:55:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 08:55:25,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:25,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:25,690 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 08:55:25,692 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 08:55:26,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 08:55:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:55:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 08:55:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:26,517 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 08:55:26,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:55:27,077 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 08:55:27,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071383849] [2021-12-16 08:55:27,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071383849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:55:27,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:55:27,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-16 08:55:27,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273019675] [2021-12-16 08:55:27,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:55:27,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 08:55:27,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:27,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 08:55:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-16 08:55:27,079 INFO L87 Difference]: Start difference. First operand 1129 states and 1374 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 08:55:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:29,647 INFO L93 Difference]: Finished difference Result 1171 states and 1436 transitions. [2021-12-16 08:55:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 08:55:29,648 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 08:55:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:29,651 INFO L225 Difference]: With dead ends: 1171 [2021-12-16 08:55:29,651 INFO L226 Difference]: Without dead ends: 1165 [2021-12-16 08:55:29,651 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 08:55:29,652 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 159 mSDsluCounter, 12510 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 13478 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:29,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 13478 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 08:55:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-16 08:55:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1147. [2021-12-16 08:55:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 756 states have (on average 1.7883597883597884) internal successors, (1352), 1135 states have internal predecessors, (1352), 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 08:55:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1397 transitions. [2021-12-16 08:55:29,662 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1397 transitions. Word has length 83 [2021-12-16 08:55:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1397 transitions. [2021-12-16 08:55:29,663 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 08:55:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1397 transitions. [2021-12-16 08:55:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 08:55:29,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:29,663 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 08:55:29,683 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 08:55:29,874 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 08:55:29,875 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash -244524564, now seen corresponding path program 4 times [2021-12-16 08:55:29,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753353291] [2021-12-16 08:55:29,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 08:55:29,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:29,877 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 08:55:29,883 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 08:55:30,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 08:55:30,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:55:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 08:55:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:30,599 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 08:55:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:55:32,008 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 08:55:32,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:32,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753353291] [2021-12-16 08:55:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753353291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 08:55:32,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 08:55:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-16 08:55:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514917317] [2021-12-16 08:55:32,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 08:55:32,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 08:55:32,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 08:55:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 08:55:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 08:55:32,010 INFO L87 Difference]: Start difference. First operand 1147 states and 1397 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 08:55:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 08:55:41,582 INFO L93 Difference]: Finished difference Result 1227 states and 1509 transitions. [2021-12-16 08:55:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 08:55:41,582 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 08:55:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 08:55:41,589 INFO L225 Difference]: With dead ends: 1227 [2021-12-16 08:55:41,589 INFO L226 Difference]: Without dead ends: 1223 [2021-12-16 08:55:41,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 08:55:41,592 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 393 mSDsluCounter, 24359 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 25339 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 08:55:41,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 25339 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 08:55:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-12-16 08:55:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1181. [2021-12-16 08:55:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 790 states have (on average 1.769620253164557) internal successors, (1398), 1169 states have internal predecessors, (1398), 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 08:55:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1443 transitions. [2021-12-16 08:55:41,608 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1443 transitions. Word has length 95 [2021-12-16 08:55:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 08:55:41,609 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1443 transitions. [2021-12-16 08:55:41,609 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 08:55:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1443 transitions. [2021-12-16 08:55:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 08:55:41,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 08:55:41,610 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 08:55:41,637 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 08:55:41,820 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 08:55:41,821 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-12-16 08:55:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 08:55:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -713567284, now seen corresponding path program 5 times [2021-12-16 08:55:41,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 08:55:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054712907] [2021-12-16 08:55:41,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:55:41,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 08:55:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 08:55:41,831 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 08:55:41,832 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 08:55:42,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-16 08:55:42,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 08:55:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 08:55:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 08:55:43,008 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 08:55:43,130 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 08:55:43,130 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 08:55:43,152 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 08:55:43,257 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 08:55:43,796 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1928 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1928)))) is different from true [2021-12-16 08:55:43,816 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1929 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1929)))) is different from true [2021-12-16 08:55:43,975 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 08:55:44,508 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32)) (|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1|))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_1| v_arrayElimCell_16)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| v_arrayElimCell_16)) (_ bv1 1))))) (exists ((v_ArrVal_1951 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1951)))) is different from true [2021-12-16 08:55:44,806 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 08:55:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 08:55:44,851 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 08:55:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 780 trivial. 170 not checked. [2021-12-16 08:55:44,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 08:55:45,087 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2004 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_2004) |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 08:55:45,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 08:55:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054712907] [2021-12-16 08:55:45,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054712907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 08:55:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268148164] [2021-12-16 08:55:45,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 08:55:45,089 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 08:55:45,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 08:55:45,091 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 08:55:45,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process