./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/basename-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/basename-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c899d9f75a53a80fe85551911016ababc48d03a22c1656000243377f27dbc4c0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:23:15,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:23:15,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:23:15,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:23:15,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:23:15,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:23:15,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:23:15,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:23:15,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:23:15,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:23:15,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:23:15,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:23:15,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:23:15,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:23:15,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:23:15,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:23:15,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:23:15,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:23:15,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:23:15,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:23:15,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:23:15,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:23:15,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:23:15,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:23:15,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:23:15,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:23:15,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:23:15,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:23:15,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:23:15,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:23:15,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:23:15,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:23:15,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:23:15,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:23:15,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:23:15,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:23:15,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:23:15,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:23:15,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:23:15,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:23:15,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:23:15,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-14 22:23:16,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:23:16,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:23:16,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:23:16,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:23:16,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:23:16,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:23:16,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:23:16,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:23:16,020 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:23:16,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:23:16,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:23:16,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:23:16,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:23:16,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:23:16,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:23:16,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 22:23:16,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:23:16,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c899d9f75a53a80fe85551911016ababc48d03a22c1656000243377f27dbc4c0 [2021-12-14 22:23:16,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:23:16,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:23:16,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:23:16,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:23:16,262 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:23:16,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-2.i [2021-12-14 22:23:16,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193584bcb/8a5cf9f207e54acca283e4df177417ec/FLAG0affd6e26 [2021-12-14 22:23:16,776 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:23:16,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i [2021-12-14 22:23:16,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193584bcb/8a5cf9f207e54acca283e4df177417ec/FLAG0affd6e26 [2021-12-14 22:23:17,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193584bcb/8a5cf9f207e54acca283e4df177417ec [2021-12-14 22:23:17,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:23:17,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:23:17,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:23:17,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:23:17,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:23:17,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:23:17" (1/1) ... [2021-12-14 22:23:17,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f30fe64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:17, skipping insertion in model container [2021-12-14 22:23:17,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:23:17" (1/1) ... [2021-12-14 22:23:17,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:23:17,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:23:17,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i[58078,58091] [2021-12-14 22:23:17,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:23:17,600 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) [2021-12-14 22:23:17,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49e142e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:17, skipping insertion in model container [2021-12-14 22:23:17,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:23:17,601 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-14 22:23:17,602 INFO L158 Benchmark]: Toolchain (without parser) took 527.20ms. Allocated memory is still 134.2MB. Free memory was 100.2MB in the beginning and 99.8MB in the end (delta: 416.5kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 22:23:17,602 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 77.6MB. Free memory is still 38.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 22:23:17,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.67ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 99.8MB in the end (delta: 85.4kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 22:23:17,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 77.6MB. Free memory is still 38.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.67ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 99.8MB in the end (delta: 85.4kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1515]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/basename-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c899d9f75a53a80fe85551911016ababc48d03a22c1656000243377f27dbc4c0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:23:19,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:23:19,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:23:19,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:23:19,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:23:19,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:23:19,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:23:19,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:23:19,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:23:19,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:23:19,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:23:19,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:23:19,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:23:19,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:23:19,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:23:19,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:23:19,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:23:19,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:23:19,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:23:19,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:23:19,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:23:19,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:23:19,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:23:19,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:23:19,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:23:19,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:23:19,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:23:19,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:23:19,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:23:19,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:23:19,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:23:19,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:23:19,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:23:19,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:23:19,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:23:19,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:23:19,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:23:19,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:23:19,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:23:19,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:23:19,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:23:19,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-14 22:23:19,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:23:19,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:23:19,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:23:19,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:23:19,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:23:19,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:23:19,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:23:19,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:23:19,434 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:23:19,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:23:19,435 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:23:19,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 22:23:19,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 22:23:19,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:23:19,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:23:19,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:23:19,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:23:19,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:23:19,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:23:19,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:23:19,438 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 22:23:19,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 22:23:19,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:23:19,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 22:23:19,438 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c899d9f75a53a80fe85551911016ababc48d03a22c1656000243377f27dbc4c0 [2021-12-14 22:23:19,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:23:19,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:23:19,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:23:19,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:23:19,780 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:23:19,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-2.i [2021-12-14 22:23:19,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c4d178f/f2b660517c68407582c3bab9e3d12ec2/FLAG45c80f629 [2021-12-14 22:23:20,361 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:23:20,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i [2021-12-14 22:23:20,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c4d178f/f2b660517c68407582c3bab9e3d12ec2/FLAG45c80f629 [2021-12-14 22:23:20,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c4d178f/f2b660517c68407582c3bab9e3d12ec2 [2021-12-14 22:23:20,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:23:20,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:23:20,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:23:20,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:23:20,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:23:20,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:23:20" (1/1) ... [2021-12-14 22:23:20,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc8f499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:20, skipping insertion in model container [2021-12-14 22:23:20,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:23:20" (1/1) ... [2021-12-14 22:23:20,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:23:20,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:23:21,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i[58078,58091] [2021-12-14 22:23:21,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:23:21,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-14 22:23:21,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:23:21,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i[58078,58091] [2021-12-14 22:23:21,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:23:21,480 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:23:21,511 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-2.i[58078,58091] [2021-12-14 22:23:21,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:23:21,581 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:23:21,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21 WrapperNode [2021-12-14 22:23:21,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:23:21,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:23:21,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:23:21,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:23:21,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,659 INFO L137 Inliner]: procedures = 353, calls = 114, calls flagged for inlining = 10, calls inlined = 9, statements flattened = 386 [2021-12-14 22:23:21,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:23:21,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:23:21,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:23:21,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:23:21,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:23:21,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:23:21,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:23:21,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:23:21,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (1/1) ... [2021-12-14 22:23:21,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:23:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:23:21,776 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) [2021-12-14 22:23:21,785 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 [2021-12-14 22:23:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-14 22:23:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-14 22:23:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 22:23:21,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 22:23:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 22:23:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-14 22:23:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-14 22:23:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 22:23:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 22:23:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:23:21,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:23:22,111 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:23:22,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:23:23,020 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:23:23,026 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:23:23,026 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-14 22:23:23,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:23:23 BoogieIcfgContainer [2021-12-14 22:23:23,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:23:23,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 22:23:23,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 22:23:23,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 22:23:23,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:23:20" (1/3) ... [2021-12-14 22:23:23,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ceca393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:23:23, skipping insertion in model container [2021-12-14 22:23:23,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:23:21" (2/3) ... [2021-12-14 22:23:23,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ceca393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:23:23, skipping insertion in model container [2021-12-14 22:23:23,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:23:23" (3/3) ... [2021-12-14 22:23:23,033 INFO L111 eAbstractionObserver]: Analyzing ICFG basename-2.i [2021-12-14 22:23:23,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 22:23:23,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 94 error locations. [2021-12-14 22:23:23,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 22:23:23,086 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 [2021-12-14 22:23:23,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 94 error locations. [2021-12-14 22:23:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 147 states have (on average 1.945578231292517) internal successors, (286), 241 states have internal predecessors, (286), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 22:23:23,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:23,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 22:23:23,105 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 37801, now seen corresponding path program 1 times [2021-12-14 22:23:23,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165704876] [2021-12-14 22:23:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:23,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:23,122 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) [2021-12-14 22:23:23,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 22:23:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 22:23:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:23,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:23,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165704876] [2021-12-14 22:23:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165704876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:23,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:23,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:23:23,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054443197] [2021-12-14 22:23:23,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:23,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:23:23,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:23:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:23,364 INFO L87 Difference]: Start difference. First operand has 245 states, 147 states have (on average 1.945578231292517) internal successors, (286), 241 states have internal predecessors, (286), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2021-12-14 22:23:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:23,730 INFO L93 Difference]: Finished difference Result 253 states and 287 transitions. [2021-12-14 22:23:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:23:23,733 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 [2021-12-14 22:23:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:23,738 INFO L225 Difference]: With dead ends: 253 [2021-12-14 22:23:23,738 INFO L226 Difference]: Without dead ends: 251 [2021-12-14 22:23:23,741 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 [2021-12-14 22:23:23,746 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 241 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:23,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 207 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 22:23:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-14 22:23:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-12-14 22:23:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 142 states have (on average 1.8591549295774648) internal successors, (264), 231 states have internal predecessors, (264), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 268 transitions. [2021-12-14 22:23:23,802 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 268 transitions. Word has length 3 [2021-12-14 22:23:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:23,803 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 268 transitions. [2021-12-14 22:23:23,803 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) [2021-12-14 22:23:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 268 transitions. [2021-12-14 22:23:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 22:23:23,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:23,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 22:23:23,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 22:23:24,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:24,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:24,015 INFO L85 PathProgramCache]: Analyzing trace with hash 37802, now seen corresponding path program 1 times [2021-12-14 22:23:24,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:24,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831557296] [2021-12-14 22:23:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:24,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:24,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:24,032 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) [2021-12-14 22:23:24,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 22:23:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:23:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:24,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:24,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:24,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831557296] [2021-12-14 22:23:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831557296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:24,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:23:24,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246513909] [2021-12-14 22:23:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:24,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:23:24,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:23:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:24,158 INFO L87 Difference]: Start difference. First operand 235 states and 268 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) [2021-12-14 22:23:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:24,564 INFO L93 Difference]: Finished difference Result 234 states and 267 transitions. [2021-12-14 22:23:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:23:24,565 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 [2021-12-14 22:23:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:24,566 INFO L225 Difference]: With dead ends: 234 [2021-12-14 22:23:24,566 INFO L226 Difference]: Without dead ends: 234 [2021-12-14 22:23:24,567 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 [2021-12-14 22:23:24,567 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:24,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 430 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:23:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-14 22:23:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-14 22:23:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 142 states have (on average 1.852112676056338) internal successors, (263), 230 states have internal predecessors, (263), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 267 transitions. [2021-12-14 22:23:24,573 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 267 transitions. Word has length 3 [2021-12-14 22:23:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:24,573 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 267 transitions. [2021-12-14 22:23:24,573 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) [2021-12-14 22:23:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 267 transitions. [2021-12-14 22:23:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 22:23:24,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:24,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 22:23:24,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:24,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:24,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1126113961, now seen corresponding path program 1 times [2021-12-14 22:23:24,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:24,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566000816] [2021-12-14 22:23:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:24,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:24,793 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) [2021-12-14 22:23:24,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 22:23:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:23:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:24,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:24,966 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:24,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566000816] [2021-12-14 22:23:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566000816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:24,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:24,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 22:23:24,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511942719] [2021-12-14 22:23:24,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:24,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 22:23:24,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:23:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:24,967 INFO L87 Difference]: Start difference. First operand 234 states and 267 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:23:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:25,454 INFO L93 Difference]: Finished difference Result 238 states and 271 transitions. [2021-12-14 22:23:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 22:23:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 22:23:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:25,456 INFO L225 Difference]: With dead ends: 238 [2021-12-14 22:23:25,456 INFO L226 Difference]: Without dead ends: 238 [2021-12-14 22:23:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:25,457 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 17 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:25,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 431 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 22:23:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-14 22:23:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2021-12-14 22:23:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 144 states have (on average 1.8402777777777777) internal successors, (265), 232 states have internal predecessors, (265), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2021-12-14 22:23:25,463 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 6 [2021-12-14 22:23:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:25,464 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2021-12-14 22:23:25,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:23:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2021-12-14 22:23:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 22:23:25,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:25,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:25,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-14 22:23:25,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:25,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2080656212, now seen corresponding path program 1 times [2021-12-14 22:23:25,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323853156] [2021-12-14 22:23:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:25,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:25,677 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) [2021-12-14 22:23:25,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 22:23:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:23:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:23:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:26,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:26,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323853156] [2021-12-14 22:23:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323853156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:23:26,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:23:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-14 22:23:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936358108] [2021-12-14 22:23:26,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:23:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 22:23:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 22:23:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 22:23:26,582 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:23:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:29,869 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-12-14 22:23:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 22:23:29,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 22:23:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:29,871 INFO L225 Difference]: With dead ends: 242 [2021-12-14 22:23:29,872 INFO L226 Difference]: Without dead ends: 242 [2021-12-14 22:23:29,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-14 22:23:29,872 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 31 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:29,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1116 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-14 22:23:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-14 22:23:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-12-14 22:23:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 151 states have (on average 1.794701986754967) internal successors, (271), 238 states have internal predecessors, (271), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 275 transitions. [2021-12-14 22:23:29,887 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 275 transitions. Word has length 10 [2021-12-14 22:23:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:29,887 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 275 transitions. [2021-12-14 22:23:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:23:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 275 transitions. [2021-12-14 22:23:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 22:23:29,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:29,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:29,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:30,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:30,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1026813049, now seen corresponding path program 1 times [2021-12-14 22:23:30,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950525460] [2021-12-14 22:23:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:30,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:30,107 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) [2021-12-14 22:23:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 22:23:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:23:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:30,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:23:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:30,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950525460] [2021-12-14 22:23:30,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950525460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:23:30,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:23:30,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-14 22:23:30,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462743662] [2021-12-14 22:23:30,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:23:30,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 22:23:30,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 22:23:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 22:23:30,438 INFO L87 Difference]: Start difference. First operand 242 states and 275 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2021-12-14 22:23:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:30,652 INFO L93 Difference]: Finished difference Result 262 states and 295 transitions. [2021-12-14 22:23:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:23:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 19 [2021-12-14 22:23:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:30,654 INFO L225 Difference]: With dead ends: 262 [2021-12-14 22:23:30,654 INFO L226 Difference]: Without dead ends: 262 [2021-12-14 22:23:30,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:23:30,656 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 24 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:30,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1835 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:23:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-14 22:23:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-12-14 22:23:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 171 states have (on average 1.7017543859649122) internal successors, (291), 258 states have internal predecessors, (291), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 295 transitions. [2021-12-14 22:23:30,662 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 295 transitions. Word has length 19 [2021-12-14 22:23:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:30,663 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 295 transitions. [2021-12-14 22:23:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2021-12-14 22:23:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 295 transitions. [2021-12-14 22:23:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 22:23:30,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:30,664 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:30,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:30,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1411098840, now seen corresponding path program 2 times [2021-12-14 22:23:30,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:30,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688792562] [2021-12-14 22:23:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:23:30,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:30,869 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) [2021-12-14 22:23:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 22:23:31,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 22:23:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:23:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:23:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:31,052 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 22:23:31,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-14 22:23:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-14 22:23:31,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:31,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688792562] [2021-12-14 22:23:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688792562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:31,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:31,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-14 22:23:31,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940491301] [2021-12-14 22:23:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:31,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:23:31,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:23:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:31,235 INFO L87 Difference]: Start difference. First operand 262 states and 295 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-14 22:23:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:31,636 INFO L93 Difference]: Finished difference Result 277 states and 311 transitions. [2021-12-14 22:23:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:23:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 39 [2021-12-14 22:23:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:31,637 INFO L225 Difference]: With dead ends: 277 [2021-12-14 22:23:31,637 INFO L226 Difference]: Without dead ends: 277 [2021-12-14 22:23:31,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:31,638 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 237 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:31,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 202 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:23:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-14 22:23:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 261. [2021-12-14 22:23:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 171 states have (on average 1.695906432748538) internal successors, (290), 257 states have internal predecessors, (290), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 294 transitions. [2021-12-14 22:23:31,642 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 294 transitions. Word has length 39 [2021-12-14 22:23:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:31,642 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 294 transitions. [2021-12-14 22:23:31,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-14 22:23:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 294 transitions. [2021-12-14 22:23:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 22:23:31,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:31,643 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:31,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:31,858 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1411098841, now seen corresponding path program 1 times [2021-12-14 22:23:31,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:31,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795913902] [2021-12-14 22:23:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:31,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:31,860 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) [2021-12-14 22:23:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 22:23:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:32,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 22:23:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:23:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:23:32,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795913902] [2021-12-14 22:23:32,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795913902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:23:32,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:23:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-14 22:23:32,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210054219] [2021-12-14 22:23:32,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 22:23:32,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 22:23:32,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 22:23:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-14 22:23:32,561 INFO L87 Difference]: Start difference. First operand 261 states and 294 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-12-14 22:23:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:32,970 INFO L93 Difference]: Finished difference Result 269 states and 302 transitions. [2021-12-14 22:23:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 22:23:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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 39 [2021-12-14 22:23:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:32,972 INFO L225 Difference]: With dead ends: 269 [2021-12-14 22:23:32,972 INFO L226 Difference]: Without dead ends: 269 [2021-12-14 22:23:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-14 22:23:32,973 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 30 mSDsluCounter, 3171 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:32,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 3441 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:23:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-14 22:23:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-14 22:23:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 179 states have (on average 1.664804469273743) internal successors, (298), 265 states have internal predecessors, (298), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 302 transitions. [2021-12-14 22:23:32,981 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 302 transitions. Word has length 39 [2021-12-14 22:23:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:32,982 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 302 transitions. [2021-12-14 22:23:32,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-12-14 22:23:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 302 transitions. [2021-12-14 22:23:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 22:23:32,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:32,983 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:33,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:33,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:33,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 233252627, now seen corresponding path program 2 times [2021-12-14 22:23:33,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963341278] [2021-12-14 22:23:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:23:33,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:33,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:33,195 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) [2021-12-14 22:23:33,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 22:23:33,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 22:23:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:23:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 22:23:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 22:23:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 22:23:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:33,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:33,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:33,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963341278] [2021-12-14 22:23:33,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963341278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:33,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:33,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:23:33,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949288132] [2021-12-14 22:23:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:33,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 22:23:33,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:23:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:33,681 INFO L87 Difference]: Start difference. First operand 269 states and 302 transitions. Second operand has 4 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) [2021-12-14 22:23:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:34,106 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2021-12-14 22:23:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 22:23:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 47 [2021-12-14 22:23:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:34,108 INFO L225 Difference]: With dead ends: 284 [2021-12-14 22:23:34,108 INFO L226 Difference]: Without dead ends: 284 [2021-12-14 22:23:34,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:34,109 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 275 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:34,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 158 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:23:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-14 22:23:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2021-12-14 22:23:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 179 states have (on average 1.6592178770949721) internal successors, (297), 264 states have internal predecessors, (297), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 301 transitions. [2021-12-14 22:23:34,112 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 301 transitions. Word has length 47 [2021-12-14 22:23:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 301 transitions. [2021-12-14 22:23:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2021-12-14 22:23:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 301 transitions. [2021-12-14 22:23:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 22:23:34,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:34,113 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:34,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 22:23:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:34,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1065773764, now seen corresponding path program 1 times [2021-12-14 22:23:34,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:34,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503607233] [2021-12-14 22:23:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:34,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:34,328 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) [2021-12-14 22:23:34,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 22:23:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:23:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:34,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 22:23:34,795 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 22:23:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-14 22:23:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:34,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:34,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503607233] [2021-12-14 22:23:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503607233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:34,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:34,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:23:34,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507241703] [2021-12-14 22:23:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:34,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:23:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:23:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:34,835 INFO L87 Difference]: Start difference. First operand 268 states and 301 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:35,149 INFO L93 Difference]: Finished difference Result 279 states and 313 transitions. [2021-12-14 22:23:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:23:35,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-14 22:23:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:35,150 INFO L225 Difference]: With dead ends: 279 [2021-12-14 22:23:35,150 INFO L226 Difference]: Without dead ends: 279 [2021-12-14 22:23:35,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:23:35,151 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 222 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:35,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 211 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 22:23:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-14 22:23:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 263. [2021-12-14 22:23:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 179 states have (on average 1.6312849162011174) internal successors, (292), 259 states have internal predecessors, (292), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2021-12-14 22:23:35,156 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 55 [2021-12-14 22:23:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:35,157 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2021-12-14 22:23:35,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2021-12-14 22:23:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 22:23:35,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:35,164 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:35,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-14 22:23:35,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:35,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1065773765, now seen corresponding path program 1 times [2021-12-14 22:23:35,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137652955] [2021-12-14 22:23:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:35,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:35,366 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) [2021-12-14 22:23:35,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 22:23:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 22:23:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:35,938 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-14 22:23:35,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 22:23:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:36,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:36,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137652955] [2021-12-14 22:23:36,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137652955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:36,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:36,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 22:23:36,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927478372] [2021-12-14 22:23:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:36,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 22:23:36,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 22:23:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 22:23:36,021 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:37,232 INFO L93 Difference]: Finished difference Result 443 states and 507 transitions. [2021-12-14 22:23:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:23:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-14 22:23:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:37,234 INFO L225 Difference]: With dead ends: 443 [2021-12-14 22:23:37,234 INFO L226 Difference]: Without dead ends: 443 [2021-12-14 22:23:37,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 22:23:37,235 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 642 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:37,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 779 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 22:23:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-14 22:23:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 367. [2021-12-14 22:23:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 283 states have (on average 1.7279151943462898) internal successors, (489), 362 states have internal predecessors, (489), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 22:23:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 495 transitions. [2021-12-14 22:23:37,244 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 495 transitions. Word has length 55 [2021-12-14 22:23:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:37,245 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 495 transitions. [2021-12-14 22:23:37,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 495 transitions. [2021-12-14 22:23:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 22:23:37,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:37,246 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:37,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:37,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:37,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2067963466, now seen corresponding path program 1 times [2021-12-14 22:23:37,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:37,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318709727] [2021-12-14 22:23:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:37,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:37,453 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) [2021-12-14 22:23:37,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 22:23:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 22:23:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:38,010 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-14 22:23:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 22:23:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 22:23:38,333 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-14 22:23:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2021-12-14 22:23:38,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 22:23:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 22:23:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:38,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:38,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:38,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318709727] [2021-12-14 22:23:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318709727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:38,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 22:23:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964606589] [2021-12-14 22:23:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:23:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:23:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 22:23:38,466 INFO L87 Difference]: Start difference. First operand 367 states and 495 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:38,557 INFO L93 Difference]: Finished difference Result 368 states and 496 transitions. [2021-12-14 22:23:38,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 22:23:38,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-12-14 22:23:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:38,559 INFO L225 Difference]: With dead ends: 368 [2021-12-14 22:23:38,559 INFO L226 Difference]: Without dead ends: 368 [2021-12-14 22:23:38,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-14 22:23:38,560 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 4 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:38,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1445 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 305 Unchecked, 0.0s Time] [2021-12-14 22:23:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-14 22:23:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-12-14 22:23:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 284 states have (on average 1.7253521126760563) internal successors, (490), 363 states have internal predecessors, (490), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 22:23:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 496 transitions. [2021-12-14 22:23:38,565 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 496 transitions. Word has length 58 [2021-12-14 22:23:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 496 transitions. [2021-12-14 22:23:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 496 transitions. [2021-12-14 22:23:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 22:23:38,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:38,566 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:38,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:38,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:38,781 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -317642580, now seen corresponding path program 1 times [2021-12-14 22:23:38,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177566310] [2021-12-14 22:23:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:38,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:38,783 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) [2021-12-14 22:23:38,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 22:23:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 22:23:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:39,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:39,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:39,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177566310] [2021-12-14 22:23:39,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177566310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:39,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:39,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 22:23:39,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684993220] [2021-12-14 22:23:39,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:39,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 22:23:39,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 22:23:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 22:23:39,191 INFO L87 Difference]: Start difference. First operand 368 states and 496 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:39,428 INFO L93 Difference]: Finished difference Result 286 states and 320 transitions. [2021-12-14 22:23:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:23:39,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-14 22:23:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:39,430 INFO L225 Difference]: With dead ends: 286 [2021-12-14 22:23:39,430 INFO L226 Difference]: Without dead ends: 286 [2021-12-14 22:23:39,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 22:23:39,431 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 263 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:39,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 954 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:23:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-14 22:23:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2021-12-14 22:23:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 181 states have (on average 1.6187845303867403) internal successors, (293), 260 states have internal predecessors, (293), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2021-12-14 22:23:39,441 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 59 [2021-12-14 22:23:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:39,441 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2021-12-14 22:23:39,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2021-12-14 22:23:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 22:23:39,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:39,442 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:39,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:39,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:39,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1256967413, now seen corresponding path program 1 times [2021-12-14 22:23:39,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605392485] [2021-12-14 22:23:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:39,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:39,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:39,644 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) [2021-12-14 22:23:39,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 22:23:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:23:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:40,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:40,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:40,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605392485] [2021-12-14 22:23:40,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605392485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:40,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:40,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:23:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945666506] [2021-12-14 22:23:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:23:40,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:23:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:23:40,023 INFO L87 Difference]: Start difference. First operand 264 states and 297 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:40,645 INFO L93 Difference]: Finished difference Result 282 states and 316 transitions. [2021-12-14 22:23:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:23:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-12-14 22:23:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:40,647 INFO L225 Difference]: With dead ends: 282 [2021-12-14 22:23:40,647 INFO L226 Difference]: Without dead ends: 282 [2021-12-14 22:23:40,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:23:40,647 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 277 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:40,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 631 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 22:23:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-14 22:23:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2021-12-14 22:23:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 193 states have (on average 1.61139896373057) internal successors, (311), 271 states have internal predecessors, (311), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 315 transitions. [2021-12-14 22:23:40,651 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 315 transitions. Word has length 60 [2021-12-14 22:23:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:40,651 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 315 transitions. [2021-12-14 22:23:40,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 315 transitions. [2021-12-14 22:23:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 22:23:40,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:40,652 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:40,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:40,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -311284142, now seen corresponding path program 1 times [2021-12-14 22:23:40,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:40,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83626965] [2021-12-14 22:23:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:40,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:40,862 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) [2021-12-14 22:23:40,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-14 22:23:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:23:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:41,349 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-14 22:23:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-14 22:23:41,414 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 22:23:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-14 22:23:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:41,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:41,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83626965] [2021-12-14 22:23:41,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83626965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:41,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:41,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 22:23:41,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967173665] [2021-12-14 22:23:41,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:41,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 22:23:41,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:23:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:41,507 INFO L87 Difference]: Start difference. First operand 275 states and 315 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:41,553 INFO L93 Difference]: Finished difference Result 275 states and 314 transitions. [2021-12-14 22:23:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 22:23:41,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-12-14 22:23:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:41,555 INFO L225 Difference]: With dead ends: 275 [2021-12-14 22:23:41,555 INFO L226 Difference]: Without dead ends: 275 [2021-12-14 22:23:41,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:23:41,556 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 0 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:41,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 588 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2021-12-14 22:23:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-14 22:23:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-12-14 22:23:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 193 states have (on average 1.6062176165803108) internal successors, (310), 271 states have internal predecessors, (310), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 314 transitions. [2021-12-14 22:23:41,572 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 314 transitions. Word has length 61 [2021-12-14 22:23:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:41,572 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 314 transitions. [2021-12-14 22:23:41,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 314 transitions. [2021-12-14 22:23:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 22:23:41,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:41,573 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:41,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:41,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:41,788 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash -311284141, now seen corresponding path program 1 times [2021-12-14 22:23:41,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708341454] [2021-12-14 22:23:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:41,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:41,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:41,790 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) [2021-12-14 22:23:41,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-14 22:23:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 22:23:42,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:42,431 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-14 22:23:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-14 22:23:42,468 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-14 22:23:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-14 22:23:42,775 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 22:23:42,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-14 22:23:42,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 22:23:42,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 22:23:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:43,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:43,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:43,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708341454] [2021-12-14 22:23:43,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708341454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:43,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:43,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 22:23:43,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447823510] [2021-12-14 22:23:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:43,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:23:43,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:23:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 22:23:43,042 INFO L87 Difference]: Start difference. First operand 275 states and 314 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:43,206 INFO L93 Difference]: Finished difference Result 275 states and 313 transitions. [2021-12-14 22:23:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:23:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-12-14 22:23:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:43,208 INFO L225 Difference]: With dead ends: 275 [2021-12-14 22:23:43,208 INFO L226 Difference]: Without dead ends: 275 [2021-12-14 22:23:43,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-14 22:23:43,208 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 4 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1389 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 348 Unchecked, 0.1s Time] [2021-12-14 22:23:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-14 22:23:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-12-14 22:23:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 193 states have (on average 1.6010362694300517) internal successors, (309), 271 states have internal predecessors, (309), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 313 transitions. [2021-12-14 22:23:43,216 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 313 transitions. Word has length 61 [2021-12-14 22:23:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:43,216 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 313 transitions. [2021-12-14 22:23:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 313 transitions. [2021-12-14 22:23:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 22:23:43,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:43,217 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:43,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:43,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:43,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -631451440, now seen corresponding path program 1 times [2021-12-14 22:23:43,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907479121] [2021-12-14 22:23:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:43,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:43,419 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) [2021-12-14 22:23:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-14 22:23:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 22:23:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:44,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:44,252 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-14 22:23:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2021-12-14 22:23:44,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-12-14 22:23:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:44,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:44,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907479121] [2021-12-14 22:23:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907479121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:44,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:44,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 22:23:44,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139017194] [2021-12-14 22:23:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:44,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 22:23:44,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:44,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 22:23:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-14 22:23:44,376 INFO L87 Difference]: Start difference. First operand 275 states and 313 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:45,128 INFO L93 Difference]: Finished difference Result 273 states and 310 transitions. [2021-12-14 22:23:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 22:23:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-12-14 22:23:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:45,129 INFO L225 Difference]: With dead ends: 273 [2021-12-14 22:23:45,129 INFO L226 Difference]: Without dead ends: 273 [2021-12-14 22:23:45,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 22:23:45,130 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 235 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:45,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 887 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 22:23:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-14 22:23:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-12-14 22:23:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 193 states have (on average 1.5854922279792747) internal successors, (306), 269 states have internal predecessors, (306), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 310 transitions. [2021-12-14 22:23:45,133 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 310 transitions. Word has length 64 [2021-12-14 22:23:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:45,134 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 310 transitions. [2021-12-14 22:23:45,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 310 transitions. [2021-12-14 22:23:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 22:23:45,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:45,134 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:45,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:45,347 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -631451439, now seen corresponding path program 1 times [2021-12-14 22:23:45,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:45,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708358485] [2021-12-14 22:23:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:45,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:45,349 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) [2021-12-14 22:23:45,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-14 22:23:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:45,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 22:23:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:45,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 22:23:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:46,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-14 22:23:46,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 22:23:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-12-14 22:23:46,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-14 22:23:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:46,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:46,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:46,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708358485] [2021-12-14 22:23:46,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708358485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:46,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:46,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 22:23:46,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502054511] [2021-12-14 22:23:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:46,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 22:23:46,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 22:23:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 22:23:46,095 INFO L87 Difference]: Start difference. First operand 273 states and 310 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:47,441 INFO L93 Difference]: Finished difference Result 272 states and 308 transitions. [2021-12-14 22:23:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 22:23:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-12-14 22:23:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:47,444 INFO L225 Difference]: With dead ends: 272 [2021-12-14 22:23:47,444 INFO L226 Difference]: Without dead ends: 272 [2021-12-14 22:23:47,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-14 22:23:47,445 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 232 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:47,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 893 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 22:23:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-14 22:23:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-12-14 22:23:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 193 states have (on average 1.5751295336787565) internal successors, (304), 268 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 308 transitions. [2021-12-14 22:23:47,449 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 308 transitions. Word has length 64 [2021-12-14 22:23:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:47,449 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 308 transitions. [2021-12-14 22:23:47,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 308 transitions. [2021-12-14 22:23:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 22:23:47,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:47,449 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:47,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:47,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:47,664 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -889593477, now seen corresponding path program 1 times [2021-12-14 22:23:47,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:47,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590682106] [2021-12-14 22:23:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:47,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:47,666 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) [2021-12-14 22:23:47,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-14 22:23:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 22:23:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:48,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 22:23:48,413 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 22:23:48,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-14 22:23:48,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:48,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-12-14 22:23:48,667 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:23:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-12-14 22:23:48,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-12-14 22:23:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:48,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:48,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590682106] [2021-12-14 22:23:48,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590682106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:48,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:48,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 22:23:48,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972105261] [2021-12-14 22:23:48,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:48,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:23:48,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:23:48,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 22:23:48,829 INFO L87 Difference]: Start difference. First operand 272 states and 308 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:50,344 INFO L93 Difference]: Finished difference Result 300 states and 340 transitions. [2021-12-14 22:23:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 22:23:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-12-14 22:23:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:50,350 INFO L225 Difference]: With dead ends: 300 [2021-12-14 22:23:50,351 INFO L226 Difference]: Without dead ends: 300 [2021-12-14 22:23:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:23:50,351 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 258 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:50,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 963 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 471 Invalid, 0 Unknown, 112 Unchecked, 1.4s Time] [2021-12-14 22:23:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-14 22:23:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 285. [2021-12-14 22:23:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 206 states have (on average 1.5825242718446602) internal successors, (326), 281 states have internal predecessors, (326), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 330 transitions. [2021-12-14 22:23:50,362 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 330 transitions. Word has length 68 [2021-12-14 22:23:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:50,363 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 330 transitions. [2021-12-14 22:23:50,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 330 transitions. [2021-12-14 22:23:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 22:23:50,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:50,364 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:50,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-14 22:23:50,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:50,576 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash -889593476, now seen corresponding path program 1 times [2021-12-14 22:23:50,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:50,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116897793] [2021-12-14 22:23:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:50,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:50,578 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) [2021-12-14 22:23:50,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-14 22:23:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 22:23:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:51,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 22:23:51,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 22:23:51,340 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 22:23:51,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-14 22:23:51,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-14 22:23:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 22:23:51,611 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:23:51,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-14 22:23:51,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-14 22:23:51,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-14 22:23:51,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-14 22:23:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 22:23:51,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:23:51,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:23:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116897793] [2021-12-14 22:23:51,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116897793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:23:51,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:23:51,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 22:23:51,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623072459] [2021-12-14 22:23:51,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:23:51,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 22:23:51,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 22:23:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 22:23:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-14 22:23:51,718 INFO L87 Difference]: Start difference. First operand 285 states and 330 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:23:54,059 INFO L93 Difference]: Finished difference Result 300 states and 337 transitions. [2021-12-14 22:23:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 22:23:54,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-12-14 22:23:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:23:54,061 INFO L225 Difference]: With dead ends: 300 [2021-12-14 22:23:54,061 INFO L226 Difference]: Without dead ends: 300 [2021-12-14 22:23:54,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-14 22:23:54,061 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 487 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:23:54,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 920 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 22:23:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-14 22:23:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 285. [2021-12-14 22:23:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 206 states have (on average 1.5631067961165048) internal successors, (322), 281 states have internal predecessors, (322), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:23:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 326 transitions. [2021-12-14 22:23:54,065 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 326 transitions. Word has length 68 [2021-12-14 22:23:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:23:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 326 transitions. [2021-12-14 22:23:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:23:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 326 transitions. [2021-12-14 22:23:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 22:23:54,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:23:54,066 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:23:54,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-14 22:23:54,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 22:23:54,266 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 90 more)] === [2021-12-14 22:23:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:23:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -269261804, now seen corresponding path program 1 times [2021-12-14 22:23:54,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 22:23:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465122737] [2021-12-14 22:23:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:23:54,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 22:23:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 22:23:54,269 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) [2021-12-14 22:23:54,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-14 22:23:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:23:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 22:23:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:23:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 22:23:55,312 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 22:23:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-14 22:23:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:23:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-12-14 22:23:55,692 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:23:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-12-14 22:23:55,797 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:23:55,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-12-14 22:23:55,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-12-14 22:23:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-14 22:23:55,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:23:56,082 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1551 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem128#1.base| v_ArrVal_1551) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))))))))) (_ bv1 1)))) is different from false [2021-12-14 22:23:56,099 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1551 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1551) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0)))))))))) (_ bv1 1)))) is different from false [2021-12-14 22:23:56,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1551 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem126#1.base| v_ArrVal_1550))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1551)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))))))))))) (_ bv1 1)))) is different from false [2021-12-14 22:23:56,231 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1551 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1550))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1551)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))))))) is different from false [2021-12-14 22:23:56,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1549 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1550 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1551 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1549))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1550)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1551)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))))))))))))) (_ bv1 1)))) is different from false [2021-12-14 22:23:56,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 22:23:56,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 88 [2021-12-14 22:23:56,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20331 treesize of output 16290 [2021-12-14 22:23:56,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16286 treesize of output 13150 [2021-12-14 22:23:56,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13150 treesize of output 12926 [2021-12-14 22:23:56,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12926 treesize of output 10462 [2021-12-14 22:24:11,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 22:24:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465122737] [2021-12-14 22:24:11,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-14 22:24:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135381491] [2021-12-14 22:24:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:24:11,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-14 22:24:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-14 22:24:11,833 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-14 22:24:11,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-14 22:24:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:24:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 22:24:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:24:14,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-14 22:24:14,483 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 22:24:14,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-14 22:24:14,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-14 22:24:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-12-14 22:24:14,634 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:24:14,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2021-12-14 22:24:14,713 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 22:24:14,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-12-14 22:24:14,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-12-14 22:24:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-14 22:24:14,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:24:14,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1679) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0)))))))))))))) is different from false [2021-12-14 22:24:14,927 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1678 (Array (_ BitVec 64) (_ BitVec 64)))) (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem126#1.base| v_ArrVal_1678))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1679)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))))))) (_ bv1 1)) (_ bv0 1))) is different from false [2021-12-14 22:24:14,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1678 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1678))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1679)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))))))) (_ bv1 1)))) is different from false [2021-12-14 22:24:14,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1678 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1677 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1677))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1678)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1679)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))))))))))) is different from false [2021-12-14 22:24:14,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 22:24:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 90 [2021-12-14 22:24:14,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14191 treesize of output 11500 [2021-12-14 22:24:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8616 treesize of output 7195 [2021-12-14 22:24:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7195 treesize of output 6152 [2021-12-14 22:24:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6152 treesize of output 5928