./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_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_FNV_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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:44:16,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:44:16,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:44:16,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:44:16,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:44:16,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:44:16,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:44:16,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:44:16,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:44:16,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:44:16,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:44:16,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:44:16,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:44:16,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:44:16,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:44:16,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:44:16,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:44:16,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:44:16,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:44:16,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:44:16,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:44:16,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:44:16,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:44:16,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:44:16,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:44:16,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:44:16,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:44:16,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:44:16,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:44:16,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:44:16,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:44:16,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:44:16,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:44:16,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:44:16,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:44:16,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:44:16,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:44:16,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:44:16,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:44:16,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:44:16,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:44:16,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 02:44:16,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:44:16,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:44:16,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:44:16,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:44:16,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:44:16,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:44:16,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:44:16,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:44:16,625 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:44:16,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:44:16,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 02:44:16,625 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:44:16,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:44:16,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 02:44:16,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:44:16,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:44:16,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:44:16,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:44:16,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:44:16,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:44:16,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:44:16,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 02:44:16,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 02:44:16,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:44:16,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2021-12-22 02:44:16,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:44:16,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:44:16,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:44:16,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:44:16,832 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:44:16,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 02:44:16,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0325d8ad3/af336c3c3d7d420994d8eda9e08373f2/FLAGd61e891bd [2021-12-22 02:44:17,463 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:44:17,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 02:44:17,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0325d8ad3/af336c3c3d7d420994d8eda9e08373f2/FLAGd61e891bd [2021-12-22 02:44:17,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0325d8ad3/af336c3c3d7d420994d8eda9e08373f2 [2021-12-22 02:44:17,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:44:17,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:44:17,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:44:17,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:44:17,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:44:17,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:44:17" (1/1) ... [2021-12-22 02:44:17,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561968bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:17, skipping insertion in model container [2021-12-22 02:44:17,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:44:17" (1/1) ... [2021-12-22 02:44:17,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:44:17,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:44:18,200 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_FNV_test10-1.i[33022,33035] [2021-12-22 02:44:18,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:44:18,380 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 02:44:18,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69e68601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:18, skipping insertion in model container [2021-12-22 02:44:18,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:44:18,381 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 02:44:18,383 INFO L158 Benchmark]: Toolchain (without parser) took 522.63ms. Allocated memory is still 107.0MB. Free memory was 75.4MB in the beginning and 66.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-22 02:44:18,383 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 02:44:18,384 INFO L158 Benchmark]: CACSL2BoogieTranslator took 518.98ms. Allocated memory is still 107.0MB. Free memory was 75.4MB in the beginning and 66.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-22 02:44:18,385 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 518.98ms. Allocated memory is still 107.0MB. Free memory was 75.4MB in the beginning and 66.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.9MB. 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_FNV_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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:44:20,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:44:20,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:44:20,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:44:20,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:44:20,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:44:20,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:44:20,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:44:20,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:44:20,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:44:20,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:44:20,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:44:20,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:44:20,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:44:20,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:44:20,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:44:20,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:44:20,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:44:20,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:44:20,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:44:20,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:44:20,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:44:20,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:44:20,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:44:20,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:44:20,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:44:20,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:44:20,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:44:20,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:44:20,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:44:20,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:44:20,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:44:20,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:44:20,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:44:20,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:44:20,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:44:20,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:44:20,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:44:20,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:44:20,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:44:20,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:44:20,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 02:44:20,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:44:20,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:44:20,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:44:20,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:44:20,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:44:20,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:44:20,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:44:20,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:44:20,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:44:20,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:44:20,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:44:20,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:44:20,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:44:20,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 02:44:20,134 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 02:44:20,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 02:44:20,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:44:20,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:44:20,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:44:20,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:44:20,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:44:20,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:44:20,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:44:20,135 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 02:44:20,136 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 02:44:20,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:44:20,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 02:44:20,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2021-12-22 02:44:20,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:44:20,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:44:20,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:44:20,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:44:20,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:44:20,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 02:44:20,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4716344/8cfe6954146f4ba5b888d7eaf86c9a60/FLAGd95e8cf85 [2021-12-22 02:44:21,066 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:44:21,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2021-12-22 02:44:21,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4716344/8cfe6954146f4ba5b888d7eaf86c9a60/FLAGd95e8cf85 [2021-12-22 02:44:21,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4716344/8cfe6954146f4ba5b888d7eaf86c9a60 [2021-12-22 02:44:21,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:44:21,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:44:21,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:44:21,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:44:21,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:44:21,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:44:21" (1/1) ... [2021-12-22 02:44:21,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54cd4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:21, skipping insertion in model container [2021-12-22 02:44:21,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:44:21" (1/1) ... [2021-12-22 02:44:21,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:44:21,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:44:21,986 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_FNV_test10-1.i[33022,33035] [2021-12-22 02:44:22,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:44:22,186 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 02:44:22,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:44:22,212 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_FNV_test10-1.i[33022,33035] [2021-12-22 02:44:22,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:44:22,282 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 02:44:22,314 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_FNV_test10-1.i[33022,33035] [2021-12-22 02:44:22,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:44:22,391 INFO L208 MainTranslator]: Completed translation [2021-12-22 02:44:22,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22 WrapperNode [2021-12-22 02:44:22,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:44:22,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 02:44:22,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 02:44:22,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 02:44:22,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,531 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2021-12-22 02:44:22,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 02:44:22,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 02:44:22,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 02:44:22,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 02:44:22,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 02:44:22,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 02:44:22,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 02:44:22,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 02:44:22,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (1/1) ... [2021-12-22 02:44:22,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:44:22,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 02:44:22,700 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 02:44:22,703 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 02:44:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 02:44:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 02:44:22,741 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 02:44:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 02:44:22,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 02:44:22,742 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 02:44:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 02:44:22,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 02:44:22,953 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 02:44:22,954 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 02:44:22,957 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 02:44:28,352 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 02:44:28,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 02:44:28,381 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2021-12-22 02:44:28,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:44:28 BoogieIcfgContainer [2021-12-22 02:44:28,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 02:44:28,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 02:44:28,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 02:44:28,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 02:44:28,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:44:21" (1/3) ... [2021-12-22 02:44:28,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b4bca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:44:28, skipping insertion in model container [2021-12-22 02:44:28,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:44:22" (2/3) ... [2021-12-22 02:44:28,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b4bca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:44:28, skipping insertion in model container [2021-12-22 02:44:28,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:44:28" (3/3) ... [2021-12-22 02:44:28,403 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-1.i [2021-12-22 02:44:28,407 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 02:44:28,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2021-12-22 02:44:28,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 02:44:28,481 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 02:44:28,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2021-12-22 02:44:28,543 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 02:44:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:44:28,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:28,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:44:28,557 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 02:44:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-22 02:44:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:28,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277390240] [2021-12-22 02:44:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:28,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:28,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:28,582 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 02:44:28,590 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 02:44:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:44:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:28,802 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 02:44:28,807 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 02:44:28,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:28,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277390240] [2021-12-22 02:44:28,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277390240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:28,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:28,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:44:28,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698106019] [2021-12-22 02:44:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:28,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:28,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:28,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:28,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:28,832 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 02:44:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:31,207 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2021-12-22 02:44:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:31,209 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 02:44:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:31,227 INFO L225 Difference]: With dead ends: 2558 [2021-12-22 02:44:31,228 INFO L226 Difference]: Without dead ends: 2556 [2021-12-22 02:44:31,229 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 02:44:31,233 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, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:31,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 02:44:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-12-22 02:44:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2021-12-22 02:44:31,354 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 02:44:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2021-12-22 02:44:31,363 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2021-12-22 02:44:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:31,363 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2021-12-22 02:44:31,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:44:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2021-12-22 02:44:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:44:31,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:31,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:44:31,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 02:44:31,571 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 02:44:31,572 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 02:44:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-22 02:44:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:31,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008530270] [2021-12-22 02:44:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:31,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:31,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:44:31,626 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 02:44:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:44:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:31,748 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 02:44:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:44:31,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:31,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008530270] [2021-12-22 02:44:31,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008530270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:31,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:31,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:44:31,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158365426] [2021-12-22 02:44:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:31,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:31,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:31,771 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 02:44:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:35,071 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2021-12-22 02:44:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:35,072 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 02:44:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:35,079 INFO L225 Difference]: With dead ends: 2973 [2021-12-22 02:44:35,086 INFO L226 Difference]: Without dead ends: 2973 [2021-12-22 02:44:35,087 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 02:44:35,088 INFO L933 BasicCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:35,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 02:44:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-12-22 02:44:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2021-12-22 02:44:35,157 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 02:44:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2021-12-22 02:44:35,169 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2021-12-22 02:44:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:35,169 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2021-12-22 02:44:35,169 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 02:44:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2021-12-22 02:44:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 02:44:35,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:35,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:44:35,197 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 02:44:35,378 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 02:44:35,379 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 02:44:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-22 02:44:35,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173250014] [2021-12-22 02:44:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:35,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:35,384 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 02:44:35,420 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 02:44:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 02:44:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:35,553 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 02:44:35,558 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 02:44:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:44:35,609 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 02:44:35,617 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:44:35,617 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 02:44:35,640 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 02:44:35,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:35,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:35,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173250014] [2021-12-22 02:44:35,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173250014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:35,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:35,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241017754] [2021-12-22 02:44:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:35,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:35,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:35,644 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 02:44:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:41,398 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2021-12-22 02:44:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:44:41,399 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 02:44:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:41,410 INFO L225 Difference]: With dead ends: 4906 [2021-12-22 02:44:41,411 INFO L226 Difference]: Without dead ends: 4906 [2021-12-22 02:44:41,411 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 02:44:41,413 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s 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, 5.6s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:41,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-22 02:44:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-12-22 02:44:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2021-12-22 02:44:41,461 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 02:44:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2021-12-22 02:44:41,469 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2021-12-22 02:44:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:41,469 INFO L470 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2021-12-22 02:44:41,469 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 02:44:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2021-12-22 02:44:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 02:44:41,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:41,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:44:41,479 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 02:44:41,677 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 02:44:41,678 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 02:44:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-22 02:44:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:41,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865416033] [2021-12-22 02:44:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:41,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:41,680 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 02:44:41,681 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 02:44:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:44:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:41,823 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 02:44:41,831 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 02:44:41,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:41,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865416033] [2021-12-22 02:44:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865416033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:41,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:41,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:44:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637414856] [2021-12-22 02:44:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:41,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:41,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:41,833 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 02:44:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:44,413 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2021-12-22 02:44:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:44,414 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 02:44:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:44,425 INFO L225 Difference]: With dead ends: 4574 [2021-12-22 02:44:44,426 INFO L226 Difference]: Without dead ends: 4574 [2021-12-22 02:44:44,426 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 02:44:44,426 INFO L933 BasicCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:44,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 02:44:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2021-12-22 02:44:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2021-12-22 02:44:44,471 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 02:44:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2021-12-22 02:44:44,479 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2021-12-22 02:44:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:44,479 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2021-12-22 02:44:44,479 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 02:44:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2021-12-22 02:44:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 02:44:44,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:44,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:44:44,501 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 02:44:44,686 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 02:44:44,686 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 02:44:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-22 02:44:44,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340744942] [2021-12-22 02:44:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:44,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:44,689 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 02:44:44,690 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 02:44:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:44:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:44,834 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 02:44:44,851 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 02:44:44,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:44,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340744942] [2021-12-22 02:44:44,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340744942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:44,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:44,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:44:44,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153980239] [2021-12-22 02:44:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:44,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:44,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:44,873 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 02:44:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:48,214 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2021-12-22 02:44:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:48,214 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 02:44:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:48,226 INFO L225 Difference]: With dead ends: 4996 [2021-12-22 02:44:48,226 INFO L226 Difference]: Without dead ends: 4996 [2021-12-22 02:44:48,226 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 02:44:48,227 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:48,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-22 02:44:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-12-22 02:44:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2021-12-22 02:44:48,274 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 02:44:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2021-12-22 02:44:48,280 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2021-12-22 02:44:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2021-12-22 02:44:48,281 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 02:44:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2021-12-22 02:44:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 02:44:48,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:48,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:44:48,289 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 02:44:48,489 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 02:44:48,489 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 02:44:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:48,490 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-22 02:44:48,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:48,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095686157] [2021-12-22 02:44:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:48,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:48,508 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 02:44:48,510 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 02:44:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:44:48,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:48,703 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 02:44:48,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:48,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095686157] [2021-12-22 02:44:48,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095686157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:48,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:48,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:48,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373682959] [2021-12-22 02:44:48,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:48,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:48,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:48,706 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 02:44:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:48,739 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2021-12-22 02:44:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:48,739 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 02:44:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:48,747 INFO L225 Difference]: With dead ends: 3541 [2021-12-22 02:44:48,747 INFO L226 Difference]: Without dead ends: 3541 [2021-12-22 02:44:48,748 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 02:44:48,748 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 02:44:48,748 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 02:44:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-12-22 02:44:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2021-12-22 02:44:48,781 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 02:44:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2021-12-22 02:44:48,786 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2021-12-22 02:44:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:48,787 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2021-12-22 02:44:48,787 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 02:44:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2021-12-22 02:44:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 02:44:48,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:48,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:44:48,809 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 02:44:48,994 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 02:44:48,995 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 02:44:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-22 02:44:48,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721986923] [2021-12-22 02:44:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:48,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:48,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:48,998 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 02:44:49,047 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 02:44:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:44:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:49,232 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 02:44:49,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:49,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721986923] [2021-12-22 02:44:49,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721986923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:49,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:49,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:44:49,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91138100] [2021-12-22 02:44:49,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:49,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:49,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:49,234 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 02:44:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:49,294 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2021-12-22 02:44:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:44:49,294 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 02:44:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:49,301 INFO L225 Difference]: With dead ends: 3513 [2021-12-22 02:44:49,301 INFO L226 Difference]: Without dead ends: 3513 [2021-12-22 02:44:49,301 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 02:44:49,302 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 02:44:49,302 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 02:44:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-12-22 02:44:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2021-12-22 02:44:49,331 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 02:44:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2021-12-22 02:44:49,336 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2021-12-22 02:44:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:49,336 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2021-12-22 02:44:49,336 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 02:44:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2021-12-22 02:44:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 02:44:49,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:49,337 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 02:44:49,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-22 02:44:49,543 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 02:44:49,544 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 02:44:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-22 02:44:49,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:49,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267297961] [2021-12-22 02:44:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:49,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:49,546 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 02:44:49,548 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 02:44:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:44:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:49,764 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 02:44:49,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:49,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267297961] [2021-12-22 02:44:49,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267297961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:49,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:49,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759662866] [2021-12-22 02:44:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:49,767 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 02:44:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:49,798 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2021-12-22 02:44:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:49,799 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 02:44:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:49,816 INFO L225 Difference]: With dead ends: 4760 [2021-12-22 02:44:49,817 INFO L226 Difference]: Without dead ends: 4760 [2021-12-22 02:44:49,817 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 02:44:49,817 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 02:44:49,818 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 02:44:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2021-12-22 02:44:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2021-12-22 02:44:49,895 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 02:44:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2021-12-22 02:44:49,901 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2021-12-22 02:44:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:49,901 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2021-12-22 02:44:49,902 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 02:44:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2021-12-22 02:44:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 02:44:49,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:49,903 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 02:44:49,931 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 02:44:50,111 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 02:44:50,111 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 02:44:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-22 02:44:50,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485090998] [2021-12-22 02:44:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:50,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:50,117 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 02:44:50,118 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 02:44:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 02:44:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:50,300 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 02:44:50,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:50,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485090998] [2021-12-22 02:44:50,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485090998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:50,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:50,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:50,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726180441] [2021-12-22 02:44:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:50,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:44:50,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:44:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:44:50,303 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 02:44:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:50,354 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2021-12-22 02:44:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:44:50,354 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 02:44:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:50,361 INFO L225 Difference]: With dead ends: 4593 [2021-12-22 02:44:50,362 INFO L226 Difference]: Without dead ends: 4593 [2021-12-22 02:44:50,362 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 02:44:50,363 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 02:44:50,364 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 02:44:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-12-22 02:44:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2021-12-22 02:44:50,392 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 02:44:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2021-12-22 02:44:50,396 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2021-12-22 02:44:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:50,396 INFO L470 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2021-12-22 02:44:50,396 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 02:44:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2021-12-22 02:44:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 02:44:50,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:50,398 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 02:44:50,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-22 02:44:50,606 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 02:44:50,606 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 02:44:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-22 02:44:50,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875632890] [2021-12-22 02:44:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:50,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:50,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:50,609 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 02:44:50,615 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 02:44:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:44:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:50,863 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 02:44:50,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:50,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:50,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875632890] [2021-12-22 02:44:50,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875632890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:50,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:50,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:44:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569508450] [2021-12-22 02:44:50,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:50,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:50,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:50,864 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 02:44:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:50,978 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2021-12-22 02:44:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:44:50,983 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 02:44:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:51,000 INFO L225 Difference]: With dead ends: 4558 [2021-12-22 02:44:51,015 INFO L226 Difference]: Without dead ends: 4558 [2021-12-22 02:44:51,015 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 02:44:51,016 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:51,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 02:44:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-22 02:44:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2021-12-22 02:44:51,075 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 02:44:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2021-12-22 02:44:51,079 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2021-12-22 02:44:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:51,084 INFO L470 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2021-12-22 02:44:51,084 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 02:44:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2021-12-22 02:44:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 02:44:51,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:51,088 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 02:44:51,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 02:44:51,295 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 02:44:51,295 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 02:44:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:51,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-22 02:44:51,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:51,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615150622] [2021-12-22 02:44:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:51,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:51,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:51,297 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 02:44:51,321 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 02:44:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:44:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:51,550 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 02:44:51,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:51,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:51,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615150622] [2021-12-22 02:44:51,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615150622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:51,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:51,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:44:51,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291231185] [2021-12-22 02:44:51,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:51,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:51,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:51,553 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 02:44:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:51,611 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2021-12-22 02:44:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:44:51,612 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 02:44:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:51,622 INFO L225 Difference]: With dead ends: 4485 [2021-12-22 02:44:51,622 INFO L226 Difference]: Without dead ends: 4485 [2021-12-22 02:44:51,622 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 02:44:51,623 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 02:44:51,623 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 02:44:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-12-22 02:44:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2021-12-22 02:44:51,651 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 02:44:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2021-12-22 02:44:51,655 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2021-12-22 02:44:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2021-12-22 02:44:51,657 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 02:44:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2021-12-22 02:44:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 02:44:51,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:51,659 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 02:44:51,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-22 02:44:51,866 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 02:44:51,866 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 02:44:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-22 02:44:51,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730679864] [2021-12-22 02:44:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:51,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:51,875 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 02:44:51,877 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 02:44:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:44:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:52,036 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 02:44:52,095 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 02:44:52,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:52,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730679864] [2021-12-22 02:44:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730679864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:52,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600230782] [2021-12-22 02:44:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:52,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:52,097 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 02:44:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:54,301 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2021-12-22 02:44:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:44:54,302 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 02:44:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:54,316 INFO L225 Difference]: With dead ends: 3502 [2021-12-22 02:44:54,317 INFO L226 Difference]: Without dead ends: 3502 [2021-12-22 02:44:54,317 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 02:44:54,318 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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 02:44:54,318 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 02:44:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-12-22 02:44:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2021-12-22 02:44:54,345 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 02:44:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2021-12-22 02:44:54,348 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2021-12-22 02:44:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:54,349 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2021-12-22 02:44:54,349 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 02:44:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2021-12-22 02:44:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 02:44:54,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:54,350 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 02:44:54,357 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 02:44:54,556 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 02:44:54,557 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 02:44:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-12-22 02:44:54,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:54,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836027122] [2021-12-22 02:44:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:54,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:54,559 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 02:44:54,560 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 02:44:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:44:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:54,728 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 02:44:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:44:54,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:54,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:54,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836027122] [2021-12-22 02:44:54,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836027122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:54,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:54,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:54,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397337632] [2021-12-22 02:44:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:54,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:54,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:54,858 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:44:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:44:58,309 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2021-12-22 02:44:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:44:58,309 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 02:44:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:44:58,323 INFO L225 Difference]: With dead ends: 3925 [2021-12-22 02:44:58,323 INFO L226 Difference]: Without dead ends: 3925 [2021-12-22 02:44:58,324 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 02:44:58,324 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:44:58,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 02:44:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-12-22 02:44:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2021-12-22 02:44:58,351 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 02:44:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2021-12-22 02:44:58,355 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2021-12-22 02:44:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:44:58,355 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2021-12-22 02:44:58,355 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 02:44:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2021-12-22 02:44:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:44:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:44:58,358 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 02:44:58,369 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 02:44:58,565 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 02:44:58,565 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 02:44:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:44:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-12-22 02:44:58,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:44:58,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332497628] [2021-12-22 02:44:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:44:58,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:44:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:44:58,567 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 02:44:58,579 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 02:44:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:44:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:44:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:44:58,755 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 02:44:58,819 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 02:44:58,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:44:58,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:44:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332497628] [2021-12-22 02:44:58,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332497628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:44:58,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:44:58,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:44:58,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759726191] [2021-12-22 02:44:58,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:44:58,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:44:58,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:44:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:44:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:44:58,821 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 02:45:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:02,392 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2021-12-22 02:45:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:02,393 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 02:45:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:02,400 INFO L225 Difference]: With dead ends: 6304 [2021-12-22 02:45:02,401 INFO L226 Difference]: Without dead ends: 6304 [2021-12-22 02:45:02,401 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 02:45:02,401 INFO L933 BasicCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:02,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-22 02:45:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-12-22 02:45:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2021-12-22 02:45:02,440 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 02:45:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2021-12-22 02:45:02,445 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2021-12-22 02:45:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:02,445 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2021-12-22 02:45:02,445 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 02:45:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2021-12-22 02:45:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:45:02,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:02,446 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 02:45:02,465 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 02:45:02,654 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 02:45:02,655 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 02:45:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-12-22 02:45:02,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:02,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237176496] [2021-12-22 02:45:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:02,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:02,659 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 02:45:02,662 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 02:45:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:02,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:45:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:02,901 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 02:45:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:45:03,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:03,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237176496] [2021-12-22 02:45:03,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237176496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:03,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:03,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:03,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057151116] [2021-12-22 02:45:03,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:03,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:03,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:03,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:03,050 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 02:45:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:07,934 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2021-12-22 02:45:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:07,935 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 02:45:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:07,941 INFO L225 Difference]: With dead ends: 5973 [2021-12-22 02:45:07,941 INFO L226 Difference]: Without dead ends: 5973 [2021-12-22 02:45:07,942 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 02:45:07,942 INFO L933 BasicCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:07,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 02:45:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-12-22 02:45:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2021-12-22 02:45:08,000 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 02:45:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2021-12-22 02:45:08,004 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2021-12-22 02:45:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2021-12-22 02:45:08,005 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 02:45:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2021-12-22 02:45:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:45:08,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:08,006 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 02:45:08,024 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 02:45:08,214 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 02:45:08,214 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 02:45:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-12-22 02:45:08,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:08,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318160429] [2021-12-22 02:45:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:08,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:08,224 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 02:45:08,225 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 02:45:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:45:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:08,370 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 02:45:08,430 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 02:45:08,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:08,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:08,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318160429] [2021-12-22 02:45:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318160429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:08,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:08,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:08,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926107408] [2021-12-22 02:45:08,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:08,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:08,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:08,432 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 02:45:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:11,985 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2021-12-22 02:45:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:45:11,986 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 02:45:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:11,992 INFO L225 Difference]: With dead ends: 6748 [2021-12-22 02:45:11,992 INFO L226 Difference]: Without dead ends: 6748 [2021-12-22 02:45:11,993 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 02:45:11,993 INFO L933 BasicCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:11,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-22 02:45:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-12-22 02:45:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2021-12-22 02:45:12,024 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 02:45:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2021-12-22 02:45:12,027 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2021-12-22 02:45:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2021-12-22 02:45:12,028 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 02:45:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2021-12-22 02:45:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 02:45:12,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:12,028 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 02:45:12,041 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 02:45:12,241 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 02:45:12,242 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 02:45:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-12-22 02:45:12,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:12,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144423932] [2021-12-22 02:45:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:12,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:12,244 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 02:45:12,245 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 02:45:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:45:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:12,440 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 02:45:12,573 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 02:45:12,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:12,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144423932] [2021-12-22 02:45:12,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144423932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:12,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:12,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:12,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008756617] [2021-12-22 02:45:12,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:12,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:12,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:12,574 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 02:45:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:16,557 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2021-12-22 02:45:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:16,557 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 02:45:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:16,562 INFO L225 Difference]: With dead ends: 4807 [2021-12-22 02:45:16,562 INFO L226 Difference]: Without dead ends: 4807 [2021-12-22 02:45:16,563 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 02:45:16,563 INFO L933 BasicCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.9s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:16,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-22 02:45:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-12-22 02:45:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2021-12-22 02:45:16,593 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 02:45:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2021-12-22 02:45:16,597 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2021-12-22 02:45:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:16,597 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2021-12-22 02:45:16,597 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 02:45:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2021-12-22 02:45:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 02:45:16,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:16,599 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 02:45:16,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 02:45:16,806 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 02:45:16,807 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 02:45:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-12-22 02:45:16,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:16,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486909640] [2021-12-22 02:45:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:16,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:16,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:16,809 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 02:45:16,811 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 02:45:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:45:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:17,033 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 02:45:17,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:17,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486909640] [2021-12-22 02:45:17,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486909640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:17,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:17,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:45:17,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955904448] [2021-12-22 02:45:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:17,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:17,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:17,037 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 02:45:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:17,091 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2021-12-22 02:45:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:17,092 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 02:45:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:17,094 INFO L225 Difference]: With dead ends: 3236 [2021-12-22 02:45:17,094 INFO L226 Difference]: Without dead ends: 3236 [2021-12-22 02:45:17,095 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 02:45:17,095 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 02:45:17,096 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 02:45:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-12-22 02:45:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2021-12-22 02:45:17,116 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 02:45:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2021-12-22 02:45:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2021-12-22 02:45:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:17,120 INFO L470 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2021-12-22 02:45:17,120 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 02:45:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2021-12-22 02:45:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 02:45:17,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:17,120 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 02:45:17,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-22 02:45:17,328 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 02:45:17,328 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 02:45:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-12-22 02:45:17,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853541923] [2021-12-22 02:45:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:17,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:17,331 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 02:45:17,341 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 02:45:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:45:17,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:17,719 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 02:45:17,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:17,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853541923] [2021-12-22 02:45:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853541923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:17,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:17,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:17,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261026082] [2021-12-22 02:45:17,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:17,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:45:17,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:17,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:45:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:45:17,720 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 02:45:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:17,824 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2021-12-22 02:45:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:45:17,825 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 02:45:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:17,829 INFO L225 Difference]: With dead ends: 4684 [2021-12-22 02:45:17,829 INFO L226 Difference]: Without dead ends: 4684 [2021-12-22 02:45:17,829 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 02:45:17,830 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 02:45:17,830 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 02:45:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-12-22 02:45:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2021-12-22 02:45:17,859 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 02:45:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2021-12-22 02:45:17,864 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2021-12-22 02:45:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:17,864 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2021-12-22 02:45:17,864 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 02:45:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2021-12-22 02:45:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 02:45:17,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:17,865 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 02:45:17,875 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 02:45:18,073 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 02:45:18,073 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 02:45:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-12-22 02:45:18,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074758114] [2021-12-22 02:45:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:18,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:18,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:18,076 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 02:45:18,120 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 02:45:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:45:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:18,363 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 02:45:18,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:18,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074758114] [2021-12-22 02:45:18,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074758114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:18,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:18,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:45:18,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274452230] [2021-12-22 02:45:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:18,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:18,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:18,365 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 02:45:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:18,434 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2021-12-22 02:45:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:18,435 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 02:45:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:18,439 INFO L225 Difference]: With dead ends: 4959 [2021-12-22 02:45:18,439 INFO L226 Difference]: Without dead ends: 4959 [2021-12-22 02:45:18,439 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 02:45:18,440 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 02:45:18,440 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 02:45:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-12-22 02:45:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2021-12-22 02:45:18,463 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 02:45:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2021-12-22 02:45:18,468 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2021-12-22 02:45:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:18,468 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2021-12-22 02:45:18,468 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 02:45:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2021-12-22 02:45:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 02:45:18,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:18,469 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 02:45:18,480 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 02:45:18,678 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 02:45:18,678 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 02:45:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-12-22 02:45:18,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:18,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126309548] [2021-12-22 02:45:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:18,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:18,686 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 02:45:18,689 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 02:45:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:18,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:45:18,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:18,992 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 02:45:18,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:18,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:18,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126309548] [2021-12-22 02:45:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126309548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:18,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:18,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:45:18,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598197334] [2021-12-22 02:45:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:18,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:18,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:18,994 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 02:45:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:19,043 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2021-12-22 02:45:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:19,043 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 02:45:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:19,048 INFO L225 Difference]: With dead ends: 4695 [2021-12-22 02:45:19,048 INFO L226 Difference]: Without dead ends: 4695 [2021-12-22 02:45:19,048 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 02:45:19,050 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 02:45:19,050 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 02:45:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2021-12-22 02:45:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2021-12-22 02:45:19,078 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 02:45:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2021-12-22 02:45:19,082 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2021-12-22 02:45:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:19,083 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2021-12-22 02:45:19,083 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 02:45:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2021-12-22 02:45:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 02:45:19,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:19,084 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 02:45:19,104 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 02:45:19,293 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 02:45:19,294 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 02:45:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2021-12-22 02:45:19,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:19,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967384013] [2021-12-22 02:45:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:19,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:19,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:19,296 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 02:45:19,297 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 02:45:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:19,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 02:45:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:19,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 02:45:19,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 02:45:19,565 INFO L353 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2021-12-22 02:45:19,566 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 02:45:19,594 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-22 02:45:19,594 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 02:45:19,658 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 02:45:19,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:19,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967384013] [2021-12-22 02:45:19,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967384013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:19,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:19,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:45:19,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143439209] [2021-12-22 02:45:19,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:19,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:19,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:19,660 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 02:45:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:20,712 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2021-12-22 02:45:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:20,714 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 02:45:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:20,718 INFO L225 Difference]: With dead ends: 3926 [2021-12-22 02:45:20,718 INFO L226 Difference]: Without dead ends: 3926 [2021-12-22 02:45:20,718 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 02:45:20,719 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:20,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2021-12-22 02:45:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-12-22 02:45:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2021-12-22 02:45:20,742 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 02:45:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2021-12-22 02:45:20,746 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2021-12-22 02:45:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2021-12-22 02:45:20,746 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 02:45:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2021-12-22 02:45:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 02:45:20,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:20,747 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 02:45:20,758 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 02:45:20,956 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 02:45:20,956 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 02:45:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-12-22 02:45:20,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:20,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254326994] [2021-12-22 02:45:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:20,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:20,959 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 02:45:21,007 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 02:45:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:45:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:21,439 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 02:45:21,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:21,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254326994] [2021-12-22 02:45:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254326994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:21,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:21,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569951105] [2021-12-22 02:45:21,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:21,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:45:21,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:45:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:45:21,440 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 02:45:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:21,584 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2021-12-22 02:45:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:45:21,585 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 02:45:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:21,590 INFO L225 Difference]: With dead ends: 5186 [2021-12-22 02:45:21,590 INFO L226 Difference]: Without dead ends: 5186 [2021-12-22 02:45:21,590 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 02:45:21,591 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 02:45:21,591 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 02:45:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2021-12-22 02:45:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2021-12-22 02:45:21,679 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 02:45:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2021-12-22 02:45:21,684 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2021-12-22 02:45:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:21,685 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2021-12-22 02:45:21,685 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 02:45:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2021-12-22 02:45:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 02:45:21,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:21,686 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 02:45:21,695 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 02:45:21,895 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 02:45:21,895 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 02:45:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-12-22 02:45:21,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010672129] [2021-12-22 02:45:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:21,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:21,898 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 02:45:21,908 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 02:45:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 02:45:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:22,267 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 02:45:22,271 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 02:45:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:45:22,621 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 02:45:22,627 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:45:22,627 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 02:45:22,634 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 02:45:22,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:22,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010672129] [2021-12-22 02:45:22,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010672129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:22,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:22,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:45:22,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076756918] [2021-12-22 02:45:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:22,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:45:22,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:45:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:45:22,636 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) [2021-12-22 02:45:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:45:25,681 INFO L93 Difference]: Finished difference Result 6874 states and 10400 transitions. [2021-12-22 02:45:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:45:25,682 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 62 [2021-12-22 02:45:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:45:25,689 INFO L225 Difference]: With dead ends: 6874 [2021-12-22 02:45:25,689 INFO L226 Difference]: Without dead ends: 6874 [2021-12-22 02:45:25,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 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 02:45:25,690 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 4069 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:45:25,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4083 Valid, 1047 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 02:45:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2021-12-22 02:45:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 4603. [2021-12-22 02:45:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 3927 states have (on average 1.7122485357779476) internal successors, (6724), 4562 states have internal predecessors, (6724), 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 02:45:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6806 transitions. [2021-12-22 02:45:25,739 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6806 transitions. Word has length 62 [2021-12-22 02:45:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:45:25,739 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 6806 transitions. [2021-12-22 02:45:25,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-12-22 02:45:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6806 transitions. [2021-12-22 02:45:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 02:45:25,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:45:25,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:45:25,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-22 02:45:25,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:45:25,950 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-12-22 02:45:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:45:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-12-22 02:45:25,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:45:25,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893700020] [2021-12-22 02:45:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:45:25,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:45:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:45:25,984 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:45:25,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-22 02:45:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:45:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 02:45:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:45:26,346 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 02:45:26,356 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 02:45:26,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-22 02:45:26,382 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 02:45:26,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:45:26,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:45:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893700020] [2021-12-22 02:45:26,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893700020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:45:26,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:45:26,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:45:26,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073268581] [2021-12-22 02:45:26,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:45:26,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 02:45:26,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:45:26,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 02:45:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:45:26,386 INFO L87 Difference]: Start difference. First operand 4603 states and 6806 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 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)