./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:20:52,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:20:52,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:20:52,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:20:52,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:20:52,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:20:52,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:20:52,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:20:52,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:20:52,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:20:52,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:20:52,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:20:52,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:20:52,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:20:52,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:20:52,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:20:52,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:20:52,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:20:52,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:20:52,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:20:52,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:20:52,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:20:52,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:20:52,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:20:52,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:20:52,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:20:52,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:20:52,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:20:52,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:20:52,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:20:52,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:20:52,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:20:52,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:20:52,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:20:52,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:20:52,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:20:52,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:20:52,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:20:52,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:20:52,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:20:52,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:20:52,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 19:20:52,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:20:52,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:20:52,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:20:52,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:20:52,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:20:52,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:20:52,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:20:52,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:20:52,899 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:20:52,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:20:52,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:20:52,901 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:20:52,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:20:52,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:20:52,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:20:52,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:20:52,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:20:52,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:20:52,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:20:52,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:20:52,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-12-22 19:20:53,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:20:53,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:20:53,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:20:53,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:20:53,081 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:20:53,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-12-22 19:20:53,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5bb200a/8dac757aed994fb18b68b02359873fc6/FLAGd5810cb63 [2021-12-22 19:20:53,621 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:20:53,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-12-22 19:20:53,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5bb200a/8dac757aed994fb18b68b02359873fc6/FLAGd5810cb63 [2021-12-22 19:20:54,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5bb200a/8dac757aed994fb18b68b02359873fc6 [2021-12-22 19:20:54,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:20:54,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:20:54,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:54,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:20:54,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:20:54,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:54" (1/1) ... [2021-12-22 19:20:54,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d69ce64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:54, skipping insertion in model container [2021-12-22 19:20:54,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:54" (1/1) ... [2021-12-22 19:20:54,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:20:54,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:20:54,462 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_SFH_test10-1.i[33022,33035] [2021-12-22 19:20:54,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:20:54,620 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-22 19:20:54,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6992e195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:54, skipping insertion in model container [2021-12-22 19:20:54,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:54,621 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 19:20:54,628 INFO L158 Benchmark]: Toolchain (without parser) took 513.19ms. Allocated memory is still 90.2MB. Free memory was 54.6MB in the beginning and 47.5MB in the end (delta: 7.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 19:20:54,629 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 47.1MB in the beginning and 47.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:20:54,630 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.44ms. Allocated memory is still 90.2MB. Free memory was 54.5MB in the beginning and 47.5MB in the end (delta: 6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:20:54,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 47.1MB in the beginning and 47.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.44ms. Allocated memory is still 90.2MB. Free memory was 54.5MB in the beginning and 47.5MB in the end (delta: 6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:20:56,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:20:56,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:20:56,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:20:56,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:20:56,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:20:56,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:20:56,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:20:56,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:20:56,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:20:56,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:20:56,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:20:56,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:20:56,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:20:56,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:20:56,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:20:56,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:20:56,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:20:56,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:20:56,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:20:56,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:20:56,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:20:56,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:20:56,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:20:56,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:20:56,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:20:56,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:20:56,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:20:56,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:20:56,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:20:56,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:20:56,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:20:56,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:20:56,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:20:56,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:20:56,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:20:56,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:20:56,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:20:56,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:20:56,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:20:56,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:20:56,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 19:20:56,117 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:20:56,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:20:56,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:20:56,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:20:56,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:20:56,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:20:56,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:20:56,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:20:56,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:20:56,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:20:56,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:20:56,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:20:56,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:20:56,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 19:20:56,125 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:20:56,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:20:56,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:20:56,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:20:56,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:20:56,127 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 19:20:56,127 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 19:20:56,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:20:56,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 19:20:56,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-12-22 19:20:56,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:20:56,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:20:56,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:20:56,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:20:56,409 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:20:56,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-12-22 19:20:56,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed575f162/e76bbbdf56e348a58fad767edf86e4a7/FLAGeeea3ce78 [2021-12-22 19:20:56,927 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:20:56,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-12-22 19:20:56,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed575f162/e76bbbdf56e348a58fad767edf86e4a7/FLAGeeea3ce78 [2021-12-22 19:20:56,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed575f162/e76bbbdf56e348a58fad767edf86e4a7 [2021-12-22 19:20:56,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:20:56,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:20:56,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:56,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:20:56,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:20:56,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:56" (1/1) ... [2021-12-22 19:20:56,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e11e0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:56, skipping insertion in model container [2021-12-22 19:20:56,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:56" (1/1) ... [2021-12-22 19:20:56,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:20:57,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:20:57,341 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_SFH_test10-1.i[33022,33035] [2021-12-22 19:20:57,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:20:57,519 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 19:20:57,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:20:57,552 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_SFH_test10-1.i[33022,33035] [2021-12-22 19:20:57,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:20:57,659 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:20:57,677 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_SFH_test10-1.i[33022,33035] [2021-12-22 19:20:57,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:20:57,753 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:20:57,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57 WrapperNode [2021-12-22 19:20:57,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:20:57,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:20:57,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:20:57,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:20:57,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,848 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2021-12-22 19:20:57,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:20:57,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:20:57,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:20:57,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:20:57,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:57,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:20:57,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:20:57,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:20:57,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:20:58,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (1/1) ... [2021-12-22 19:20:58,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:20:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:20:58,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:20:58,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:20:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 19:20:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 19:20:58,052 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 19:20:58,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 19:20:58,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 19:20:58,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 19:20:58,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 19:20:58,054 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 19:20:58,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 19:20:58,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 19:20:58,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 19:20:58,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:20:58,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:20:58,294 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:20:58,308 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:20:58,310 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 19:21:03,807 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:21:03,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:21:03,832 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2021-12-22 19:21:03,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:03 BoogieIcfgContainer [2021-12-22 19:21:03,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:21:03,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:21:03,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:21:03,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:21:03,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:56" (1/3) ... [2021-12-22 19:21:03,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a83da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:03, skipping insertion in model container [2021-12-22 19:21:03,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57" (2/3) ... [2021-12-22 19:21:03,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a83da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:03, skipping insertion in model container [2021-12-22 19:21:03,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:03" (3/3) ... [2021-12-22 19:21:03,842 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-1.i [2021-12-22 19:21:03,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:21:03,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2021-12-22 19:21:03,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:21:03,884 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:21:03,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2021-12-22 19:21:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-22 19:21:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:21:03,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:03,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:21:03,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-22 19:21:03,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108840466] [2021-12-22 19:21:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:03,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:03,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:03,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 19:21:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:04,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:04,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:04,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:04,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108840466] [2021-12-22 19:21:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108840466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:04,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:04,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:04,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184487119] [2021-12-22 19:21:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:04,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:04,214 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:06,702 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2021-12-22 19:21:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 19:21:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:06,720 INFO L225 Difference]: With dead ends: 2558 [2021-12-22 19:21:06,721 INFO L226 Difference]: Without dead ends: 2556 [2021-12-22 19:21:06,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:06,724 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:06,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 19:21:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-12-22 19:21:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2021-12-22 19:21:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 19:21:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2021-12-22 19:21:06,819 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2021-12-22 19:21:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2021-12-22 19:21:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2021-12-22 19:21:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:21:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:06,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:21:06,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 19:21:07,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:07,042 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-22 19:21:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:07,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014362004] [2021-12-22 19:21:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:07,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:07,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:07,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 19:21:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:07,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:07,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:07,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:07,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014362004] [2021-12-22 19:21:07,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014362004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:07,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:07,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:07,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809661154] [2021-12-22 19:21:07,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:07,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:07,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:07,201 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:10,371 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2021-12-22 19:21:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 19:21:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:10,379 INFO L225 Difference]: With dead ends: 2973 [2021-12-22 19:21:10,379 INFO L226 Difference]: Without dead ends: 2973 [2021-12-22 19:21:10,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:10,380 INFO L933 BasicCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:10,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 19:21:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-12-22 19:21:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2021-12-22 19:21:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-22 19:21:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2021-12-22 19:21:10,412 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2021-12-22 19:21:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:10,412 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2021-12-22 19:21:10,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2021-12-22 19:21:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 19:21:10,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:10,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:10,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 19:21:10,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:10,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-22 19:21:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882427507] [2021-12-22 19:21:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:10,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:10,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:10,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 19:21:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:10,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 19:21:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:10,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:10,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 19:21:10,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 19:21:10,842 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 19:21:10,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-22 19:21:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:10,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:10,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:10,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882427507] [2021-12-22 19:21:10,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882427507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:10,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:10,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:10,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474605923] [2021-12-22 19:21:10,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:10,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:10,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:10,870 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:16,291 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2021-12-22 19:21:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 19:21:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:16,302 INFO L225 Difference]: With dead ends: 4906 [2021-12-22 19:21:16,302 INFO L226 Difference]: Without dead ends: 4906 [2021-12-22 19:21:16,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:16,305 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:16,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-22 19:21:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-12-22 19:21:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2021-12-22 19:21:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2021-12-22 19:21:16,374 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2021-12-22 19:21:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:16,376 INFO L470 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2021-12-22 19:21:16,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2021-12-22 19:21:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:21:16,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:16,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:16,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:16,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:16,583 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-22 19:21:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75458377] [2021-12-22 19:21:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:16,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:16,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:16,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:16,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 19:21:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:16,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:16,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:16,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:16,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75458377] [2021-12-22 19:21:16,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75458377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:16,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:16,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:16,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944527300] [2021-12-22 19:21:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:16,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:16,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:16,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:16,771 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:18,968 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2021-12-22 19:21:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 19:21:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:18,989 INFO L225 Difference]: With dead ends: 4574 [2021-12-22 19:21:18,989 INFO L226 Difference]: Without dead ends: 4574 [2021-12-22 19:21:18,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:18,990 INFO L933 BasicCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:18,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 19:21:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2021-12-22 19:21:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2021-12-22 19:21:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2021-12-22 19:21:19,047 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2021-12-22 19:21:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2021-12-22 19:21:19,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2021-12-22 19:21:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:21:19,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:19,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:19,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:19,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:19,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-22 19:21:19,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411311977] [2021-12-22 19:21:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:19,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:19,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:19,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 19:21:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:19,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:19,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:19,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:19,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411311977] [2021-12-22 19:21:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411311977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:19,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:21:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150951908] [2021-12-22 19:21:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:19,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:19,422 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:22,626 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2021-12-22 19:21:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 19:21:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:22,638 INFO L225 Difference]: With dead ends: 4996 [2021-12-22 19:21:22,639 INFO L226 Difference]: Without dead ends: 4996 [2021-12-22 19:21:22,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:22,639 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:22,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 19:21:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-12-22 19:21:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2021-12-22 19:21:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2021-12-22 19:21:22,705 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2021-12-22 19:21:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:22,705 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2021-12-22 19:21:22,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2021-12-22 19:21:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 19:21:22,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:22,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:22,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:22,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:22,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-22 19:21:22,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:22,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116702105] [2021-12-22 19:21:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:22,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:22,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:22,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:22,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 19:21:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:23,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:23,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:23,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116702105] [2021-12-22 19:21:23,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116702105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:23,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:23,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675470161] [2021-12-22 19:21:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:23,108 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:23,137 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2021-12-22 19:21:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 19:21:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:23,153 INFO L225 Difference]: With dead ends: 3541 [2021-12-22 19:21:23,153 INFO L226 Difference]: Without dead ends: 3541 [2021-12-22 19:21:23,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:23,154 INFO L933 BasicCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:23,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-12-22 19:21:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2021-12-22 19:21:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2021-12-22 19:21:23,206 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2021-12-22 19:21:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:23,207 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2021-12-22 19:21:23,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2021-12-22 19:21:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 19:21:23,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:23,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:23,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:23,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:23,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-22 19:21:23,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269507028] [2021-12-22 19:21:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:23,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:23,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:23,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 19:21:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:23,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:23,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:23,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269507028] [2021-12-22 19:21:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269507028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:23,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:23,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954315378] [2021-12-22 19:21:23,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:23,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:23,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:23,601 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:23,686 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2021-12-22 19:21:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 19:21:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:23,700 INFO L225 Difference]: With dead ends: 3513 [2021-12-22 19:21:23,700 INFO L226 Difference]: Without dead ends: 3513 [2021-12-22 19:21:23,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:23,701 INFO L933 BasicCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-12-22 19:21:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2021-12-22 19:21:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2021-12-22 19:21:23,746 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2021-12-22 19:21:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:23,747 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2021-12-22 19:21:23,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2021-12-22 19:21:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:21:23,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:23,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:23,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:23,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:23,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-22 19:21:23,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183207754] [2021-12-22 19:21:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:23,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:23,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:23,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 19:21:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:24,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:24,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183207754] [2021-12-22 19:21:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183207754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:24,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:24,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:24,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197603343] [2021-12-22 19:21:24,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:24,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:24,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:24,146 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:24,194 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2021-12-22 19:21:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:24,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 19:21:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:24,203 INFO L225 Difference]: With dead ends: 4760 [2021-12-22 19:21:24,203 INFO L226 Difference]: Without dead ends: 4760 [2021-12-22 19:21:24,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:24,204 INFO L933 BasicCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:24,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2021-12-22 19:21:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2021-12-22 19:21:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2021-12-22 19:21:24,249 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2021-12-22 19:21:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:24,250 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2021-12-22 19:21:24,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2021-12-22 19:21:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:21:24,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:24,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:24,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:24,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:24,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-22 19:21:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:24,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050646071] [2021-12-22 19:21:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:24,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:24,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 19:21:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:21:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:24,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:24,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050646071] [2021-12-22 19:21:24,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050646071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:24,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:24,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:24,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845620559] [2021-12-22 19:21:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:24,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:24,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:24,647 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:24,689 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2021-12-22 19:21:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 19:21:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:24,695 INFO L225 Difference]: With dead ends: 4593 [2021-12-22 19:21:24,696 INFO L226 Difference]: Without dead ends: 4593 [2021-12-22 19:21:24,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:24,696 INFO L933 BasicCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:24,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-12-22 19:21:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2021-12-22 19:21:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2021-12-22 19:21:24,735 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2021-12-22 19:21:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:24,735 INFO L470 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2021-12-22 19:21:24,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2021-12-22 19:21:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:21:24,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:24,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:24,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:24,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:24,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-22 19:21:24,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:24,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545597287] [2021-12-22 19:21:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:24,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:24,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:24,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 19:21:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:25,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:25,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:25,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545597287] [2021-12-22 19:21:25,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545597287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:25,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:25,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:25,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514737291] [2021-12-22 19:21:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:25,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:25,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:25,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:25,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:25,168 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:25,258 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2021-12-22 19:21:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 19:21:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:25,265 INFO L225 Difference]: With dead ends: 4558 [2021-12-22 19:21:25,265 INFO L226 Difference]: Without dead ends: 4558 [2021-12-22 19:21:25,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:25,266 INFO L933 BasicCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:25,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-22 19:21:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2021-12-22 19:21:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2021-12-22 19:21:25,318 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2021-12-22 19:21:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:25,319 INFO L470 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2021-12-22 19:21:25,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2021-12-22 19:21:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:21:25,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:25,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:25,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-22 19:21:25,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:25,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-22 19:21:25,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:25,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435477819] [2021-12-22 19:21:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:25,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:25,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:25,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:25,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 19:21:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:25,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:25,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435477819] [2021-12-22 19:21:25,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435477819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:25,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:25,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:25,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560959502] [2021-12-22 19:21:25,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:25,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:25,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:25,725 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:25,794 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2021-12-22 19:21:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 19:21:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:25,800 INFO L225 Difference]: With dead ends: 4485 [2021-12-22 19:21:25,801 INFO L226 Difference]: Without dead ends: 4485 [2021-12-22 19:21:25,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:25,801 INFO L933 BasicCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:25,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-12-22 19:21:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2021-12-22 19:21:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2021-12-22 19:21:25,838 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2021-12-22 19:21:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:25,838 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2021-12-22 19:21:25,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2021-12-22 19:21:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:21:25,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:25,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:25,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:26,051 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-22 19:21:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388674631] [2021-12-22 19:21:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:26,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:26,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:26,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:26,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 19:21:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:26,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:26,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:26,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:26,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388674631] [2021-12-22 19:21:26,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388674631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:26,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:26,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:26,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379965284] [2021-12-22 19:21:26,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:26,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:26,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:26,242 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:28,540 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2021-12-22 19:21:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 19:21:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:28,551 INFO L225 Difference]: With dead ends: 3502 [2021-12-22 19:21:28,551 INFO L226 Difference]: Without dead ends: 3502 [2021-12-22 19:21:28,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:28,552 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:28,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 19:21:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-12-22 19:21:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2021-12-22 19:21:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2021-12-22 19:21:28,585 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2021-12-22 19:21:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:28,586 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2021-12-22 19:21:28,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2021-12-22 19:21:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:21:28,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:28,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:28,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:28,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:28,798 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-22 19:21:28,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:28,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441947166] [2021-12-22 19:21:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:28,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:28,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:28,800 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:28,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 19:21:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:28,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:21:28,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:28,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:29,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:29,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441947166] [2021-12-22 19:21:29,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441947166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:29,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:29,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:29,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368724534] [2021-12-22 19:21:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:29,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:29,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:29,105 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:32,771 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2021-12-22 19:21:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:21:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 19:21:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:32,776 INFO L225 Difference]: With dead ends: 3925 [2021-12-22 19:21:32,776 INFO L226 Difference]: Without dead ends: 3925 [2021-12-22 19:21:32,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:32,779 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:32,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-22 19:21:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-12-22 19:21:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2021-12-22 19:21:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2021-12-22 19:21:32,809 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2021-12-22 19:21:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:32,810 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2021-12-22 19:21:32,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2021-12-22 19:21:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:32,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:32,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:32,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:33,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:33,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-22 19:21:33,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:33,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148881704] [2021-12-22 19:21:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:33,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:33,022 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:33,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 19:21:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:33,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:33,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:33,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148881704] [2021-12-22 19:21:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148881704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:33,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:33,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:33,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454901987] [2021-12-22 19:21:33,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:33,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:33,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:33,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:33,256 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:36,684 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2021-12-22 19:21:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 19:21:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:36,690 INFO L225 Difference]: With dead ends: 6304 [2021-12-22 19:21:36,690 INFO L226 Difference]: Without dead ends: 6304 [2021-12-22 19:21:36,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:36,691 INFO L933 BasicCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:36,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 19:21:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-12-22 19:21:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2021-12-22 19:21:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2021-12-22 19:21:36,732 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2021-12-22 19:21:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:36,732 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2021-12-22 19:21:36,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2021-12-22 19:21:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:36,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:36,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:36,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:36,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:36,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-12-22 19:21:36,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262020581] [2021-12-22 19:21:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:36,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:36,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:36,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 19:21:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:21:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:37,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:37,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:37,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:37,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262020581] [2021-12-22 19:21:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262020581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:37,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:37,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:37,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866253815] [2021-12-22 19:21:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:37,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:37,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:37,282 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:42,016 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2021-12-22 19:21:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 19:21:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:42,022 INFO L225 Difference]: With dead ends: 5973 [2021-12-22 19:21:42,022 INFO L226 Difference]: Without dead ends: 5973 [2021-12-22 19:21:42,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:42,023 INFO L933 BasicCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:42,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-22 19:21:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-12-22 19:21:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2021-12-22 19:21:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2498 states have (on average 1.8254603682946358) internal successors, (4560), 3226 states have internal predecessors, (4560), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2021-12-22 19:21:42,069 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2021-12-22 19:21:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2021-12-22 19:21:42,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2021-12-22 19:21:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:42,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:42,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:42,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:42,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:42,278 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:42,279 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-12-22 19:21:42,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:42,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809166024] [2021-12-22 19:21:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:42,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:42,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:42,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 19:21:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:21:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:42,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:42,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:42,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:42,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809166024] [2021-12-22 19:21:42,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809166024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:42,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:42,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:42,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017776370] [2021-12-22 19:21:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:42,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:42,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:42,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:42,560 INFO L87 Difference]: Start difference. First operand 3251 states and 4610 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:46,334 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2021-12-22 19:21:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:21:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 19:21:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:46,342 INFO L225 Difference]: With dead ends: 6748 [2021-12-22 19:21:46,342 INFO L226 Difference]: Without dead ends: 6748 [2021-12-22 19:21:46,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:46,343 INFO L933 BasicCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:46,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-22 19:21:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-12-22 19:21:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2021-12-22 19:21:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8166533226581265) internal successors, (4538), 3223 states have internal predecessors, (4538), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2021-12-22 19:21:46,392 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2021-12-22 19:21:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:46,392 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2021-12-22 19:21:46,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2021-12-22 19:21:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:21:46,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:46,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:46,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:46,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:46,607 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-12-22 19:21:46,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382266727] [2021-12-22 19:21:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:46,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:46,609 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) [2021-12-22 19:21:46,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 19:21:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:21:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:46,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:46,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:46,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382266727] [2021-12-22 19:21:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382266727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:46,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:46,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:46,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566329409] [2021-12-22 19:21:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:46,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:46,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:46,936 INFO L87 Difference]: Start difference. First operand 3248 states and 4588 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:50,751 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2021-12-22 19:21:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:50,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 19:21:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:50,755 INFO L225 Difference]: With dead ends: 4807 [2021-12-22 19:21:50,755 INFO L226 Difference]: Without dead ends: 4807 [2021-12-22 19:21:50,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:50,756 INFO L933 BasicCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:50,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-22 19:21:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-12-22 19:21:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2021-12-22 19:21:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8134507606084869) internal successors, (4530), 3223 states have internal predecessors, (4530), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2021-12-22 19:21:50,786 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2021-12-22 19:21:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:50,786 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2021-12-22 19:21:50,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2021-12-22 19:21:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 19:21:50,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:50,787 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] [2021-12-22 19:21:50,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-22 19:21:50,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:50,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-12-22 19:21:50,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:50,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822634346] [2021-12-22 19:21:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:50,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:50,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:51,004 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) [2021-12-22 19:21:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 19:21:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:51,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:51,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:51,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822634346] [2021-12-22 19:21:51,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822634346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:51,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:51,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:51,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177995856] [2021-12-22 19:21:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:51,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:51,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:51,221 INFO L87 Difference]: Start difference. First operand 3248 states and 4580 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:51,269 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2021-12-22 19:21:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 40 [2021-12-22 19:21:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:51,275 INFO L225 Difference]: With dead ends: 3236 [2021-12-22 19:21:51,275 INFO L226 Difference]: Without dead ends: 3236 [2021-12-22 19:21:51,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:51,275 INFO L933 BasicCegarLoop]: 1797 mSDtfsCounter, 756 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4622 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 [2021-12-22 19:21:51,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 4622 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-12-22 19:21:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2021-12-22 19:21:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2486 states have (on average 1.8125502815768302) internal successors, (4506), 3211 states have internal predecessors, (4506), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-22 19:21:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2021-12-22 19:21:51,307 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2021-12-22 19:21:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2021-12-22 19:21:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2021-12-22 19:21:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 19:21:51,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:51,308 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] [2021-12-22 19:21:51,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-22 19:21:51,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:51,515 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-12-22 19:21:51,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:51,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045250809] [2021-12-22 19:21:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:51,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:51,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:51,517 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) [2021-12-22 19:21:51,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 19:21:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:51,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:51,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045250809] [2021-12-22 19:21:51,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045250809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:51,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:51,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:51,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721123537] [2021-12-22 19:21:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:51,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:51,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:51,855 INFO L87 Difference]: Start difference. First operand 3236 states and 4556 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:51,979 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2021-12-22 19:21:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2021-12-22 19:21:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:51,984 INFO L225 Difference]: With dead ends: 4684 [2021-12-22 19:21:51,984 INFO L226 Difference]: Without dead ends: 4684 [2021-12-22 19:21:51,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:51,985 INFO L933 BasicCegarLoop]: 1820 mSDtfsCounter, 1180 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:51,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 3502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:21:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-12-22 19:21:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2021-12-22 19:21:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3266 states have (on average 1.7988364972443356) internal successors, (5875), 3988 states have internal predecessors, (5875), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 19:21:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2021-12-22 19:21:52,025 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2021-12-22 19:21:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:52,025 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2021-12-22 19:21:52,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2021-12-22 19:21:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 19:21:52,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:52,026 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] [2021-12-22 19:21:52,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:52,233 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-12-22 19:21:52,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:52,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673771259] [2021-12-22 19:21:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:52,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:52,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:52,235 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) [2021-12-22 19:21:52,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 19:21:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:52,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:52,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:52,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673771259] [2021-12-22 19:21:52,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673771259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:52,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:52,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:52,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611969800] [2021-12-22 19:21:52,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:52,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:52,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:52,531 INFO L87 Difference]: Start difference. First operand 4020 states and 5939 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:52,586 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2021-12-22 19:21:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2021-12-22 19:21:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:52,591 INFO L225 Difference]: With dead ends: 4959 [2021-12-22 19:21:52,591 INFO L226 Difference]: Without dead ends: 4959 [2021-12-22 19:21:52,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:52,592 INFO L933 BasicCegarLoop]: 2867 mSDtfsCounter, 1755 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 6826 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 [2021-12-22 19:21:52,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 6826 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-12-22 19:21:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2021-12-22 19:21:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3224 states have (on average 1.8005583126550868) internal successors, (5805), 3946 states have internal predecessors, (5805), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 19:21:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2021-12-22 19:21:52,627 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2021-12-22 19:21:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2021-12-22 19:21:52,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2021-12-22 19:21:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 19:21:52,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:52,628 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] [2021-12-22 19:21:52,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:52,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:52,837 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-12-22 19:21:52,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:52,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316374381] [2021-12-22 19:21:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:52,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:52,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:52,839 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) [2021-12-22 19:21:52,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-22 19:21:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:53,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:53,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:53,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:53,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316374381] [2021-12-22 19:21:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316374381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:53,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162000137] [2021-12-22 19:21:53,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:53,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:53,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:53,149 INFO L87 Difference]: Start difference. First operand 3978 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:53,195 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2021-12-22 19:21:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-12-22 19:21:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:53,200 INFO L225 Difference]: With dead ends: 4695 [2021-12-22 19:21:53,200 INFO L226 Difference]: Without dead ends: 4695 [2021-12-22 19:21:53,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:53,200 INFO L933 BasicCegarLoop]: 2907 mSDtfsCounter, 1746 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 6955 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 [2021-12-22 19:21:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 6955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:21:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2021-12-22 19:21:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2021-12-22 19:21:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3206 states have (on average 1.8013100436681222) internal successors, (5775), 3928 states have internal predecessors, (5775), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 19:21:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2021-12-22 19:21:53,247 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2021-12-22 19:21:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2021-12-22 19:21:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2021-12-22 19:21:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 19:21:53,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:53,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:53,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:53,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:53,474 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2021-12-22 19:21:53,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:53,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259490994] [2021-12-22 19:21:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:53,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:53,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:53,477 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:53,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-22 19:21:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 19:21:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 19:21:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 19:21:53,759 INFO L353 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2021-12-22 19:21:53,760 INFO L387 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 29 treesize of output 36 [2021-12-22 19:21:53,797 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-22 19:21:53,797 INFO L387 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 60 treesize of output 20 [2021-12-22 19:21:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:53,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:53,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:53,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259490994] [2021-12-22 19:21:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259490994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:53,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:53,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:21:53,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650025576] [2021-12-22 19:21:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:53,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:53,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:53,866 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:55,042 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2021-12-22 19:21:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:21:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-22 19:21:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:55,047 INFO L225 Difference]: With dead ends: 3926 [2021-12-22 19:21:55,047 INFO L226 Difference]: Without dead ends: 3926 [2021-12-22 19:21:55,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:21:55,047 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:55,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 1.1s Time] [2021-12-22 19:21:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-12-22 19:21:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2021-12-22 19:21:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3172 states have (on average 1.8095838587641866) internal successors, (5740), 3894 states have internal predecessors, (5740), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 19:21:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2021-12-22 19:21:55,147 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2021-12-22 19:21:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:55,147 INFO L470 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2021-12-22 19:21:55,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2021-12-22 19:21:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 19:21:55,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:55,147 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] [2021-12-22 19:21:55,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-22 19:21:55,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:55,348 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-12-22 19:21:55,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158844413] [2021-12-22 19:21:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:55,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:55,350 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-22 19:21:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:21:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:55,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:55,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158844413] [2021-12-22 19:21:55,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158844413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:55,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:55,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:55,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060038234] [2021-12-22 19:21:55,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:21:55,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:21:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:55,804 INFO L87 Difference]: Start difference. First operand 3926 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:21:55,932 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2021-12-22 19:21:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:21:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-12-22 19:21:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:21:55,938 INFO L225 Difference]: With dead ends: 5186 [2021-12-22 19:21:55,938 INFO L226 Difference]: Without dead ends: 5186 [2021-12-22 19:21:55,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:21:55,938 INFO L933 BasicCegarLoop]: 1948 mSDtfsCounter, 870 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:21:55,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 3621 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:21:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2021-12-22 19:21:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2021-12-22 19:21:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4083 states have (on average 1.7891256429096252) internal successors, (7305), 4802 states have internal predecessors, (7305), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-22 19:21:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2021-12-22 19:21:55,992 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2021-12-22 19:21:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:21:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2021-12-22 19:21:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:21:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2021-12-22 19:21:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 19:21:55,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:21:55,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:21:56,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-22 19:21:56,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 19:21:56,203 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 19:21:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:21:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-12-22 19:21:56,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 19:21:56,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608105125] [2021-12-22 19:21:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:21:56,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 19:21:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 19:21:56,204 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 19:21:56,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-22 19:21:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:21:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 19:21:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:21:56,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:56,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 19:21:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 19:21:56,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 19:21:56,909 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 19:21:56,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 19:21:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:21:56,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:21:56,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 19:21:56,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608105125] [2021-12-22 19:21:56,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608105125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:21:56,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:21:56,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:21:56,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692090977] [2021-12-22 19:21:56,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:21:56,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:21:56,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 19:21:56,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:21:56,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:21:56,918 INFO L87 Difference]: Start difference. First operand 4843 states and 7387 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 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)