./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:52:44,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:52:44,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:52:44,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:52:44,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:52:44,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:52:44,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:52:44,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:52:44,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:52:44,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:52:44,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:52:44,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:52:44,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:52:44,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:52:44,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:52:44,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:52:44,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:52:44,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:52:44,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:52:44,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:52:44,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:52:44,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:52:44,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:52:44,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:52:44,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:52:44,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:52:44,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:52:44,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:52:44,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:52:44,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:52:44,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:52:44,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:52:44,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:52:44,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:52:44,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:52:44,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:52:44,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:52:44,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:52:44,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:52:44,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:52:44,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:52:44,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:52:45,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:52:45,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:52:45,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:52:45,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:52:45,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:52:45,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:52:45,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:52:45,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:52:45,016 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:52:45,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:52:45,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:52:45,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:52:45,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:52:45,017 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:52:45,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:52:45,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:52:45,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:52:45,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:52:45,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:52:45,019 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2021-12-06 17:52:45,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:52:45,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:52:45,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:52:45,229 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:52:45,230 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:52:45,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-12-06 17:52:45,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/0d36fcb42/4522135e6a674b97a7231c828743a9a8/FLAG3c7a88733 [2021-12-06 17:52:45,696 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:52:45,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-12-06 17:52:45,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/0d36fcb42/4522135e6a674b97a7231c828743a9a8/FLAG3c7a88733 [2021-12-06 17:52:45,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/0d36fcb42/4522135e6a674b97a7231c828743a9a8 [2021-12-06 17:52:45,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:52:45,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:52:45,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:52:45,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:52:45,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:52:45,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:52:45" (1/1) ... [2021-12-06 17:52:45,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38035dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:45, skipping insertion in model container [2021-12-06 17:52:45,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:52:45" (1/1) ... [2021-12-06 17:52:45,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:52:45,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:52:45,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:52:45,952 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) [2021-12-06 17:52:45,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fa5b703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:45, skipping insertion in model container [2021-12-06 17:52:45,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:52:45,953 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 17:52:45,955 INFO L158 Benchmark]: Toolchain (without parser) took 235.92ms. Allocated memory is still 83.9MB. Free memory was 46.9MB in the beginning and 57.4MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:52:45,955 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:52:45,956 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.07ms. Allocated memory is still 83.9MB. Free memory was 46.7MB in the beginning and 57.7MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:52:45,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.07ms. Allocated memory is still 83.9MB. Free memory was 46.7MB in the beginning and 57.7MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:52:47,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:52:47,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:52:47,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:52:47,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:52:47,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:52:47,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:52:47,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:52:47,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:52:47,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:52:47,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:52:47,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:52:47,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:52:47,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:52:47,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:52:47,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:52:47,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:52:47,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:52:47,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:52:47,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:52:47,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:52:47,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:52:47,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:52:47,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:52:47,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:52:47,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:52:47,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:52:47,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:52:47,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:52:47,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:52:47,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:52:47,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:52:47,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:52:47,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:52:47,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:52:47,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:52:47,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:52:47,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:52:47,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:52:47,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:52:47,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:52:47,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 17:52:47,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:52:47,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:52:47,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:52:47,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:52:47,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:52:47,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:52:47,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:52:47,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:52:47,492 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:52:47,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:52:47,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:52:47,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:52:47,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:52:47,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:52:47,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:52:47,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:52:47,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:52:47,495 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 17:52:47,495 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 17:52:47,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:52:47,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 17:52:47,495 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2021-12-06 17:52:47,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:52:47,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:52:47,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:52:47,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:52:47,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:52:47,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-12-06 17:52:47,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/a3a3e0066/f8cb166abfe34fd4a9ae86ca8f27f490/FLAG87000adad [2021-12-06 17:52:48,230 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:52:48,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-12-06 17:52:48,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/a3a3e0066/f8cb166abfe34fd4a9ae86ca8f27f490/FLAG87000adad [2021-12-06 17:52:48,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/data/a3a3e0066/f8cb166abfe34fd4a9ae86ca8f27f490 [2021-12-06 17:52:48,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:52:48,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:52:48,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:52:48,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:52:48,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:52:48,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366feb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48, skipping insertion in model container [2021-12-06 17:52:48,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:52:48,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:52:48,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:52:48,510 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 17:52:48,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:52:48,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:52:48,541 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:52:48,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:52:48,591 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:52:48,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48 WrapperNode [2021-12-06 17:52:48,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:52:48,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:52:48,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:52:48,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:52:48,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,625 INFO L137 Inliner]: procedures = 119, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-12-06 17:52:48,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:52:48,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:52:48,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:52:48,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:52:48,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:52:48,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:52:48,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:52:48,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:52:48,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (1/1) ... [2021-12-06 17:52:48,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:52:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:48,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:52:48,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:52:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-06 17:52:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:52:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:52:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 17:52:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:52:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:52:48,782 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:52:48,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:52:48,931 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:52:48,935 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:52:48,936 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:52:48,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:52:48 BoogieIcfgContainer [2021-12-06 17:52:48,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:52:48,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:52:48,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:52:48,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:52:48,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:52:48" (1/3) ... [2021-12-06 17:52:48,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ecce11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:52:48, skipping insertion in model container [2021-12-06 17:52:48,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:52:48" (2/3) ... [2021-12-06 17:52:48,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ecce11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:52:48, skipping insertion in model container [2021-12-06 17:52:48,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:52:48" (3/3) ... [2021-12-06 17:52:48,945 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder1-alloca-1.i [2021-12-06 17:52:48,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:52:48,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-12-06 17:52:48,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:52:48,995 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 [2021-12-06 17:52:48,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-06 17:52:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 17:52:49,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:49,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:52:49,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-06 17:52:49,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110529703] [2021-12-06 17:52:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:49,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:49,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 17:52:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:52:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:49,167 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 [2021-12-06 17:52:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:49,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:49,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110529703] [2021-12-06 17:52:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110529703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:49,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:52:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442602101] [2021-12-06 17:52:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:52:49,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:52:49,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:52:49,210 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-06 17:52:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:49,265 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-06 17:52:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:52:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-12-06 17:52:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:49,274 INFO L225 Difference]: With dead ends: 22 [2021-12-06 17:52:49,274 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 17:52:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:52:49,280 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:49,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 17:52:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 17:52:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-06 17:52:49,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2021-12-06 17:52:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:49,310 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-06 17:52:49,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-06 17:52:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-06 17:52:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 17:52:49,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:49,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:52:49,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:49,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-06 17:52:49,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:49,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433547281] [2021-12-06 17:52:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:49,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:49,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:49,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:49,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 17:52:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:52:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:49,721 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 [2021-12-06 17:52:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:49,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:49,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433547281] [2021-12-06 17:52:49,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433547281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:49,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:49,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:52:49,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515468550] [2021-12-06 17:52:49,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:52:49,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:52:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:52:49,753 INFO L87 Difference]: Start difference. First operand 20 states and 22 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) [2021-12-06 17:52:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:49,844 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-12-06 17:52:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:52:49,845 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 [2021-12-06 17:52:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:49,845 INFO L225 Difference]: With dead ends: 41 [2021-12-06 17:52:49,845 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 17:52:49,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:52:49,847 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:49,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 65 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:52:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 17:52:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-12-06 17:52:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-06 17:52:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-06 17:52:49,851 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2021-12-06 17:52:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:49,851 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-06 17:52:49,852 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) [2021-12-06 17:52:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-06 17:52:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 17:52:49,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:49,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:52:49,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:52:50,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-06 17:52:50,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583862363] [2021-12-06 17:52:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:50,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:50,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:50,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:52:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:52:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:50,245 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 8 treesize of output 7 [2021-12-06 17:52:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:50,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:50,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583862363] [2021-12-06 17:52:50,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583862363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:50,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:50,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:52:50,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520750179] [2021-12-06 17:52:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:50,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:52:50,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:52:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:52:50,294 INFO L87 Difference]: Start difference. First operand 23 states and 25 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) [2021-12-06 17:52:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:50,319 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-06 17:52:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:52:50,319 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 [2021-12-06 17:52:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:50,320 INFO L225 Difference]: With dead ends: 25 [2021-12-06 17:52:50,320 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 17:52:50,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:52:50,321 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:50,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-12-06 17:52:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 17:52:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-06 17:52:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-06 17:52:50,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2021-12-06 17:52:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-06 17:52:50,325 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) [2021-12-06 17:52:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-06 17:52:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:52:50,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:50,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:50,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 17:52:50,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-12-06 17:52:50,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:50,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180926359] [2021-12-06 17:52:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:50,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:50,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:50,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:52:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:52:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:50,618 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 [2021-12-06 17:52:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:50,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:50,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180926359] [2021-12-06 17:52:50,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180926359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:50,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:50,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:52:50,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148109571] [2021-12-06 17:52:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:50,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:52:50,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:52:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:52:50,643 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:50,703 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-06 17:52:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:52:50,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:52:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:50,704 INFO L225 Difference]: With dead ends: 26 [2021-12-06 17:52:50,704 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:52:50,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:52:50,705 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:50,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:52:50,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-12-06 17:52:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-06 17:52:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-06 17:52:50,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-12-06 17:52:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:50,708 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-06 17:52:50,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-06 17:52:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:52:50,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:50,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:50,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 17:52:50,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-12-06 17:52:50,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:50,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438830016] [2021-12-06 17:52:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:50,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:50,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:50,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 17:52:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:52:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:51,075 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 8 treesize of output 7 [2021-12-06 17:52:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:51,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:51,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:51,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438830016] [2021-12-06 17:52:51,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438830016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:51,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:51,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:52:51,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948731728] [2021-12-06 17:52:51,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:51,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:52:51,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:52:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:52:51,198 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:51,220 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-06 17:52:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:52:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:52:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:51,221 INFO L225 Difference]: With dead ends: 26 [2021-12-06 17:52:51,221 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:52:51,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:52:51,222 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:51,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-06 17:52:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:52:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 17:52:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-12-06 17:52:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 17:52:51,225 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2021-12-06 17:52:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:51,225 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 17:52:51,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 17:52:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:52:51,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:51,225 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:51,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:51,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:51,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-06 17:52:51,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:51,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816795589] [2021-12-06 17:52:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:51,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:51,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:52:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:52:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:51,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816795589] [2021-12-06 17:52:51,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816795589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:51,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:51,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 17:52:51,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014282644] [2021-12-06 17:52:51,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:51,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:52:51,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:51,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:52:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:52:51,631 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-06 17:52:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:51,680 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-06 17:52:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:52:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 [2021-12-06 17:52:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:51,681 INFO L225 Difference]: With dead ends: 40 [2021-12-06 17:52:51,681 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:52:51,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:52:51,682 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:51,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:52:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-12-06 17:52:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 17:52:51,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2021-12-06 17:52:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 17:52:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-06 17:52:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 17:52:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:52:51,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:51,686 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:51,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 17:52:51,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:51,888 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-06 17:52:51,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:51,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677498910] [2021-12-06 17:52:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:51,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:51,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:51,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:51,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:52:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:52:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:52,066 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 8 treesize of output 7 [2021-12-06 17:52:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:52,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:52,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677498910] [2021-12-06 17:52:52,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677498910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:52,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:52,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-06 17:52:52,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392185721] [2021-12-06 17:52:52,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:52,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:52:52,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:52:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:52:52,641 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:52,878 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-06 17:52:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:52:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:52:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:52,880 INFO L225 Difference]: With dead ends: 45 [2021-12-06 17:52:52,880 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 17:52:52,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:52:52,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:52,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-12-06 17:52:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 17:52:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-12-06 17:52:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-12-06 17:52:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-06 17:52:52,884 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2021-12-06 17:52:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:52,884 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-06 17:52:52,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-06 17:52:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:52:52,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:52,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:52,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 17:52:53,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:53,087 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2021-12-06 17:52:53,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880208177] [2021-12-06 17:52:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:53,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:53,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:53,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:52:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:52:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:53,237 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 [2021-12-06 17:52:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:53,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:53,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880208177] [2021-12-06 17:52:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880208177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:53,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:52:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000498077] [2021-12-06 17:52:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:52:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:52:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:52:53,296 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-06 17:52:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:53,410 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-12-06 17:52:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:52:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-12-06 17:52:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:53,412 INFO L225 Difference]: With dead ends: 58 [2021-12-06 17:52:53,412 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 17:52:53,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:52:53,413 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:53,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 72 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:52:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 17:52:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-12-06 17:52:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-12-06 17:52:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-06 17:52:53,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 12 [2021-12-06 17:52:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:53,417 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-06 17:52:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-06 17:52:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-06 17:52:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:52:53,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:53,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:53,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:53,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:53,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2021-12-06 17:52:53,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:53,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690570974] [2021-12-06 17:52:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:53,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:53,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:53,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:52:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:53,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:52:53,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:53,757 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 8 treesize of output 7 [2021-12-06 17:52:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:54,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:54,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690570974] [2021-12-06 17:52:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690570974] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:54,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:52:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-12-06 17:52:54,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964364177] [2021-12-06 17:52:54,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:52:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:52:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:52:54,510 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-06 17:52:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:55,077 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-12-06 17:52:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:52:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-12-06 17:52:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:55,079 INFO L225 Difference]: With dead ends: 46 [2021-12-06 17:52:55,079 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:52:55,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:52:55,080 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:55,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:52:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:52:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-12-06 17:52:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 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) [2021-12-06 17:52:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-06 17:52:55,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2021-12-06 17:52:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:55,085 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-06 17:52:55,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-06 17:52:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-06 17:52:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:52:55,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:55,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:55,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 17:52:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:55,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1604245468, now seen corresponding path program 1 times [2021-12-06 17:52:55,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:55,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921047379] [2021-12-06 17:52:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:55,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:55,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:55,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 17:52:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:52:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:55,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:52:55,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921047379] [2021-12-06 17:52:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921047379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:55,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:55,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:52:55,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616442824] [2021-12-06 17:52:55,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:55,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:52:55,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:52:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:52:55,373 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:55,416 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-12-06 17:52:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:52:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:52:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:55,418 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:52:55,418 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 17:52:55,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:52:55,419 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:55,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 17:52:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-12-06 17:52:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 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) [2021-12-06 17:52:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-12-06 17:52:55,423 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2021-12-06 17:52:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:55,424 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-12-06 17:52:55,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-12-06 17:52:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:52:55,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:55,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:55,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 17:52:55,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:55,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1346080030, now seen corresponding path program 1 times [2021-12-06 17:52:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223537734] [2021-12-06 17:52:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:55,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:55,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 17:52:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:52:55,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:55,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223537734] [2021-12-06 17:52:55,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223537734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:55,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:55,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 17:52:55,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592259396] [2021-12-06 17:52:55,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:55,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:52:55,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:52:55,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:52:55,867 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-12-06 17:52:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:56,021 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-06 17:52:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:52:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:52:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:56,022 INFO L225 Difference]: With dead ends: 53 [2021-12-06 17:52:56,022 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 17:52:56,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:52:56,023 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:56,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:52:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 17:52:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-12-06 17:52:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 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) [2021-12-06 17:52:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-06 17:52:56,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2021-12-06 17:52:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-06 17:52:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-12-06 17:52:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-06 17:52:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:52:56,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:56,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:56,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 17:52:56,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:56,228 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash 262066236, now seen corresponding path program 1 times [2021-12-06 17:52:56,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:56,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163150506] [2021-12-06 17:52:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:56,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:56,233 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:56,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 17:52:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:52:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:56,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:56,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163150506] [2021-12-06 17:52:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163150506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:56,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:56,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 17:52:56,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347218997] [2021-12-06 17:52:56,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:56,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:52:56,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:52:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:52:56,440 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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) [2021-12-06 17:52:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:56,476 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-12-06 17:52:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:52:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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 16 [2021-12-06 17:52:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:56,477 INFO L225 Difference]: With dead ends: 47 [2021-12-06 17:52:56,477 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:52:56,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:52:56,478 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:56,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:52:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-12-06 17:52:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 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) [2021-12-06 17:52:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-06 17:52:56,484 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2021-12-06 17:52:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-06 17:52:56,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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) [2021-12-06 17:52:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-06 17:52:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:52:56,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:56,485 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:56,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 17:52:56,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:56,685 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -749051014, now seen corresponding path program 1 times [2021-12-06 17:52:56,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849083476] [2021-12-06 17:52:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:56,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:56,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:56,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:56,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 17:52:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:52:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:56,738 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 8 treesize of output 7 [2021-12-06 17:52:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:56,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:52:57,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:52:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849083476] [2021-12-06 17:52:57,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849083476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:57,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:57,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 17:52:57,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237155806] [2021-12-06 17:52:57,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:57,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:52:57,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:52:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:52:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:52:57,470 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-12-06 17:52:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:58,135 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-12-06 17:52:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:52:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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 16 [2021-12-06 17:52:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:58,136 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:52:58,136 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 17:52:58,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:52:58,137 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:58,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 56 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-12-06 17:52:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 17:52:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-12-06 17:52:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-06 17:52:58,140 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-12-06 17:52:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-06 17:52:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-12-06 17:52:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-06 17:52:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:52:58,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:58,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:58,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:58,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:52:58,342 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:52:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1557469017, now seen corresponding path program 1 times [2021-12-06 17:52:58,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:52:58,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883888503] [2021-12-06 17:52:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:58,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:52:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:52:58,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:52:58,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 17:52:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:52:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:53:00,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:53:00,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883888503] [2021-12-06 17:53:00,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883888503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:53:00,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:53:00,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:53:00,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963177154] [2021-12-06 17:53:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:53:00,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:53:00,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:53:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-06 17:53:00,490 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:00,495 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-12-06 17:53:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:53:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:53:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:00,496 INFO L225 Difference]: With dead ends: 50 [2021-12-06 17:53:00,496 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 17:53:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-06 17:53:00,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:00,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-06 17:53:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 17:53:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-06 17:53:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 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) [2021-12-06 17:53:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-06 17:53:00,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2021-12-06 17:53:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:00,499 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-06 17:53:00,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-06 17:53:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:53:00,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:00,500 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-06 17:53:00,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 17:53:00,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:00,701 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-06 17:53:00,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:00,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693625455] [2021-12-06 17:53:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:00,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:00,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 17:53:00,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:00,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:53:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:00,794 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 8 treesize of output 7 [2021-12-06 17:53:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:01,895 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:01,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693625455] [2021-12-06 17:53:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693625455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:01,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-06 17:53:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691368243] [2021-12-06 17:53:01,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:53:01,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:53:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:53:01,897 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:03,748 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2021-12-06 17:53:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:53:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:53:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:03,750 INFO L225 Difference]: With dead ends: 131 [2021-12-06 17:53:03,750 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 17:53:03,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:53:03,751 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:03,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 99 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2021-12-06 17:53:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 17:53:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 51. [2021-12-06 17:53:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 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) [2021-12-06 17:53:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-06 17:53:03,755 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 18 [2021-12-06 17:53:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-06 17:53:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-06 17:53:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:53:03,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:03,756 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:03,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 17:53:03,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:03,957 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1515193216, now seen corresponding path program 2 times [2021-12-06 17:53:03,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788803478] [2021-12-06 17:53:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:03,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:03,963 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:03,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 17:53:04,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:04,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:53:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:04,047 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 8 treesize of output 7 [2021-12-06 17:53:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788803478] [2021-12-06 17:53:06,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788803478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:06,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:06,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-12-06 17:53:06,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765945719] [2021-12-06 17:53:06,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:06,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:53:06,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:53:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:53:06,699 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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) [2021-12-06 17:53:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:07,714 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-12-06 17:53:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:53:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 24 [2021-12-06 17:53:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:07,717 INFO L225 Difference]: With dead ends: 73 [2021-12-06 17:53:07,717 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:53:07,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:53:07,718 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:07,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 92 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2021-12-06 17:53:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:53:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-12-06 17:53:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-12-06 17:53:07,722 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 24 [2021-12-06 17:53:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:07,722 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-12-06 17:53:07,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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) [2021-12-06 17:53:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-12-06 17:53:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:53:07,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:07,724 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:07,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:07,925 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1844565766, now seen corresponding path program 3 times [2021-12-06 17:53:07,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312509710] [2021-12-06 17:53:07,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:07,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:07,930 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:07,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 17:53:08,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:53:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:08,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:53:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:08,064 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 8 treesize of output 7 [2021-12-06 17:53:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:53:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:53:10,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:10,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312509710] [2021-12-06 17:53:10,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312509710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:10,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:10,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-06 17:53:10,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362712729] [2021-12-06 17:53:10,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:53:10,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:53:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:53:10,684 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 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) [2021-12-06 17:53:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:15,343 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-12-06 17:53:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:53:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 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 32 [2021-12-06 17:53:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:15,345 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:53:15,345 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:53:15,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:53:15,346 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:15,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 69 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 130 Invalid, 0 Unknown, 18 Unchecked, 1.9s Time] [2021-12-06 17:53:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:53:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2021-12-06 17:53:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 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) [2021-12-06 17:53:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-12-06 17:53:15,349 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 32 [2021-12-06 17:53:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:15,349 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-12-06 17:53:15,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 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) [2021-12-06 17:53:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-12-06 17:53:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:53:15,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:15,350 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-06 17:53:15,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:15,551 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-06 17:53:15,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777325033] [2021-12-06 17:53:15,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:15,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:15,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:15,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 17:53:15,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 17:53:15,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:53:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:15,718 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 8 treesize of output 7 [2021-12-06 17:53:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:16,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:20,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:20,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777325033] [2021-12-06 17:53:20,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777325033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:20,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:20,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-06 17:53:20,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030029299] [2021-12-06 17:53:20,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:20,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:53:20,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:53:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:53:20,035 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 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) [2021-12-06 17:53:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:37,590 INFO L93 Difference]: Finished difference Result 483 states and 497 transitions. [2021-12-06 17:53:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:53:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 17:53:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:37,594 INFO L225 Difference]: With dead ends: 483 [2021-12-06 17:53:37,594 INFO L226 Difference]: Without dead ends: 483 [2021-12-06 17:53:37,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:53:37,595 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 434 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:37,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 314 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 567 Invalid, 0 Unknown, 22 Unchecked, 3.2s Time] [2021-12-06 17:53:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-06 17:53:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 99. [2021-12-06 17:53:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 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) [2021-12-06 17:53:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2021-12-06 17:53:37,600 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 34 [2021-12-06 17:53:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:37,601 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2021-12-06 17:53:37,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 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) [2021-12-06 17:53:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2021-12-06 17:53:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:53:37,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:37,602 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:37,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 17:53:37,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:37,803 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 597234191, now seen corresponding path program 4 times [2021-12-06 17:53:37,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:37,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202794007] [2021-12-06 17:53:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:53:37,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:37,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:37,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:37,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 17:53:37,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:53:37,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:53:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:37,937 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 8 treesize of output 7 [2021-12-06 17:53:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:53:38,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:43,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:43,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202794007] [2021-12-06 17:53:43,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202794007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:43,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:43,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-12-06 17:53:43,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210543446] [2021-12-06 17:53:43,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:43,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:53:43,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:53:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:53:43,496 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-12-06 17:53:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:45,066 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-12-06 17:53:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:53:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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 44 [2021-12-06 17:53:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:45,068 INFO L225 Difference]: With dead ends: 141 [2021-12-06 17:53:45,068 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 17:53:45,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:53:45,069 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:45,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2021-12-06 17:53:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 17:53:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-12-06 17:53:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 103 states have internal predecessors, (117), 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) [2021-12-06 17:53:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-12-06 17:53:45,073 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 44 [2021-12-06 17:53:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:45,073 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-12-06 17:53:45,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-12-06 17:53:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-12-06 17:53:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:53:45,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:45,075 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:45,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:53:45,276 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:53:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 557214165, now seen corresponding path program 5 times [2021-12-06 17:53:45,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:53:45,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131095496] [2021-12-06 17:53:45,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:53:45,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:53:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:53:45,283 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:53:45,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 17:53:45,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 17:53:45,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:53:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:45,465 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 8 treesize of output 7 [2021-12-06 17:53:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 8 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:46,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:51,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:53:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131095496] [2021-12-06 17:53:51,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131095496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:51,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:51,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-12-06 17:53:51,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336576720] [2021-12-06 17:53:51,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:51,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 17:53:51,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:53:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 17:53:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:53:51,356 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 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) [2021-12-06 17:54:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:03,316 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-12-06 17:54:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:54:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 17:54:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:03,319 INFO L225 Difference]: With dead ends: 155 [2021-12-06 17:54:03,319 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 17:54:03,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=634, Invalid=2788, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:54:03,320 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 248 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:03,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 226 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 17:54:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 17:54:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-12-06 17:54:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 137 states have internal predecessors, (151), 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) [2021-12-06 17:54:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2021-12-06 17:54:03,324 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 52 [2021-12-06 17:54:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:03,325 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2021-12-06 17:54:03,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 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) [2021-12-06 17:54:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2021-12-06 17:54:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:54:03,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:03,326 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:03,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 17:54:03,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:54:03,527 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:54:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash -724026728, now seen corresponding path program 6 times [2021-12-06 17:54:03,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:54:03,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449275179] [2021-12-06 17:54:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:54:03,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:54:03,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:54:03,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:54:03,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 17:54:03,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:54:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:54:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:03,817 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 8 treesize of output 7 [2021-12-06 17:54:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:04,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:11,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:54:11,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449275179] [2021-12-06 17:54:11,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449275179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:11,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:54:11,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-06 17:54:11,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286234247] [2021-12-06 17:54:11,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:11,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:54:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:54:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:54:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:54:11,441 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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) [2021-12-06 17:54:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:32,392 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2021-12-06 17:54:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 17:54:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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 56 [2021-12-06 17:54:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:32,394 INFO L225 Difference]: With dead ends: 203 [2021-12-06 17:54:32,394 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 17:54:32,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=661, Invalid=4741, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:54:32,396 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:32,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 377 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 873 Invalid, 0 Unknown, 268 Unchecked, 4.7s Time] [2021-12-06 17:54:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 17:54:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-12-06 17:54:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 137 states have internal predecessors, (150), 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) [2021-12-06 17:54:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2021-12-06 17:54:32,399 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 56 [2021-12-06 17:54:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:32,400 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2021-12-06 17:54:32,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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) [2021-12-06 17:54:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2021-12-06 17:54:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:54:32,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:32,400 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:32,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 17:54:32,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:54:32,601 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:54:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 488520603, now seen corresponding path program 7 times [2021-12-06 17:54:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:54:32,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899705270] [2021-12-06 17:54:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:54:32,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:54:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:54:32,607 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:54:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 17:54:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:32,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:54:32,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:32,729 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 8 treesize of output 7 [2021-12-06 17:54:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 34 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:33,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:41,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:54:41,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899705270] [2021-12-06 17:54:41,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899705270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:41,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:54:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-12-06 17:54:41,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496045687] [2021-12-06 17:54:41,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:41,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:54:41,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:54:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:54:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:54:41,622 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 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) [2021-12-06 17:54:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:45,990 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2021-12-06 17:54:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:54:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 17:54:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:45,992 INFO L225 Difference]: With dead ends: 197 [2021-12-06 17:54:45,992 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 17:54:45,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:54:45,993 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:45,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 278 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 374 Invalid, 0 Unknown, 29 Unchecked, 2.3s Time] [2021-12-06 17:54:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 17:54:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-12-06 17:54:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.0818713450292399) internal successors, (185), 172 states have internal predecessors, (185), 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) [2021-12-06 17:54:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2021-12-06 17:54:45,997 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 60 [2021-12-06 17:54:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:45,997 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2021-12-06 17:54:45,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 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) [2021-12-06 17:54:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2021-12-06 17:54:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:54:45,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:45,998 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:46,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 17:54:46,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:54:46,199 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:54:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -749046242, now seen corresponding path program 8 times [2021-12-06 17:54:46,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:54:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424392348] [2021-12-06 17:54:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:54:46,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:54:46,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:54:46,204 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:54:46,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 17:54:46,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:54:46,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:54:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:46,344 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 8 treesize of output 7 [2021-12-06 17:54:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:47,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:55,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:54:55,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424392348] [2021-12-06 17:54:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424392348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:55,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:54:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-12-06 17:54:55,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068221516] [2021-12-06 17:54:55,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:55,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:54:55,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:54:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:54:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:54:55,203 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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) [2021-12-06 17:55:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:22,348 INFO L93 Difference]: Finished difference Result 216 states and 226 transitions. [2021-12-06 17:55:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 17:55:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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 64 [2021-12-06 17:55:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:22,350 INFO L225 Difference]: With dead ends: 216 [2021-12-06 17:55:22,350 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:55:22,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=1020, Invalid=4092, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 17:55:22,352 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 311 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 317 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 974 Invalid, 0 Unknown, 38 Unchecked, 3.4s Time] [2021-12-06 17:55:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:55:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 132. [2021-12-06 17:55:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 131 states have internal predecessors, (142), 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) [2021-12-06 17:55:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2021-12-06 17:55:22,355 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 64 [2021-12-06 17:55:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:22,355 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2021-12-06 17:55:22,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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) [2021-12-06 17:55:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2021-12-06 17:55:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:55:22,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:22,355 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-12-06 17:55:22,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 17:55:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:55:22,557 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:55:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-12-06 17:55:22,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:55:22,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103282039] [2021-12-06 17:55:22,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:22,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:55:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:55:22,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:55:22,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 17:55:22,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:22,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:55:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:22,674 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 8 treesize of output 7 [2021-12-06 17:55:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:23,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:34,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:55:34,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103282039] [2021-12-06 17:55:34,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103282039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:34,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:55:34,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-06 17:55:34,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804770932] [2021-12-06 17:55:34,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:34,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:55:34,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:55:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:55:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:55:34,584 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 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) [2021-12-06 17:55:43,686 WARN L227 SmtUtils]: Spent 6.60s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:55:45,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:55:47,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:55:49,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:55:51,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:55:59,868 WARN L227 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:56:14,721 WARN L227 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:56:16,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:18,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:20,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:22,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:30,789 WARN L227 SmtUtils]: Spent 7.24s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:56:44,403 WARN L227 SmtUtils]: Spent 12.90s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:56:46,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:48,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:50,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:56:56,566 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:57:06,509 WARN L227 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:57:20,916 WARN L227 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:57:31,770 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:57:41,004 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:57:43,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:45,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:47,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:17,171 INFO L93 Difference]: Finished difference Result 1711 states and 1737 transitions. [2021-12-06 17:58:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 17:58:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 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 66 [2021-12-06 17:58:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:17,178 INFO L225 Difference]: With dead ends: 1711 [2021-12-06 17:58:17,178 INFO L226 Difference]: Without dead ends: 1711 [2021-12-06 17:58:17,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 136.9s TimeCoverageRelationStatistics Valid=2223, Invalid=5259, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 17:58:17,181 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 2127 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 173 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:17,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 1010 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1917 Invalid, 12 Unknown, 62 Unchecked, 33.2s Time] [2021-12-06 17:58:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-12-06 17:58:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 196. [2021-12-06 17:58:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 195 states have internal predecessors, (222), 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) [2021-12-06 17:58:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2021-12-06 17:58:17,190 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 66 [2021-12-06 17:58:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:17,191 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2021-12-06 17:58:17,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 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) [2021-12-06 17:58:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2021-12-06 17:58:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:58:17,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:17,191 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:17,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 17:58:17,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:58:17,392 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:58:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1676703076, now seen corresponding path program 9 times [2021-12-06 17:58:17,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:58:17,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071160089] [2021-12-06 17:58:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:58:17,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:58:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:58:17,398 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:58:17,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 17:58:18,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 17:58:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:58:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:18,038 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 8 treesize of output 7 [2021-12-06 17:58:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 38 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:19,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 38 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:58:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071160089] [2021-12-06 17:58:24,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071160089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:24,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:58:24,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-12-06 17:58:24,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19792139] [2021-12-06 17:58:24,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:24,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:58:24,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:58:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:58:24,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:58:24,657 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 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) [2021-12-06 17:58:28,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:30,385 INFO L93 Difference]: Finished difference Result 261 states and 285 transitions. [2021-12-06 17:58:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:58:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 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 72 [2021-12-06 17:58:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:30,387 INFO L225 Difference]: With dead ends: 261 [2021-12-06 17:58:30,387 INFO L226 Difference]: Without dead ends: 195 [2021-12-06 17:58:30,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 17:58:30,388 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:30,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 323 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 472 Invalid, 0 Unknown, 7 Unchecked, 3.0s Time] [2021-12-06 17:58:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-06 17:58:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-06 17:58:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.1243523316062176) internal successors, (217), 194 states have internal predecessors, (217), 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) [2021-12-06 17:58:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-12-06 17:58:30,391 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 72 [2021-12-06 17:58:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:30,392 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-12-06 17:58:30,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 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) [2021-12-06 17:58:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-12-06 17:58:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 17:58:30,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:30,392 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:30,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 17:58:30,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:58:30,593 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:58:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1366894655, now seen corresponding path program 10 times [2021-12-06 17:58:30,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:58:30,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592621837] [2021-12-06 17:58:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:58:30,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:58:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:58:30,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:58:30,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 17:58:30,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:58:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:58:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:30,834 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 8 treesize of output 7 [2021-12-06 17:58:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 150 proven. 478 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:58:33,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:53,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:58:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592621837] [2021-12-06 17:58:53,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592621837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:53,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:58:53,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34] total 63 [2021-12-06 17:58:53,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826436072] [2021-12-06 17:58:53,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:53,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 17:58:53,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:58:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 17:58:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=3446, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 17:58:53,047 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 63 states have internal predecessors, (207), 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) [2021-12-06 17:59:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:22,775 INFO L93 Difference]: Finished difference Result 304 states and 325 transitions. [2021-12-06 17:59:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 17:59:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 63 states have internal predecessors, (207), 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 108 [2021-12-06 17:59:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:22,778 INFO L225 Difference]: With dead ends: 304 [2021-12-06 17:59:22,778 INFO L226 Difference]: Without dead ends: 261 [2021-12-06 17:59:22,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=1036, Invalid=7336, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 17:59:22,781 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 333 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:22,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 831 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1230 Invalid, 0 Unknown, 141 Unchecked, 8.0s Time] [2021-12-06 17:59:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-06 17:59:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 200. [2021-12-06 17:59:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 199 states have internal predecessors, (221), 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) [2021-12-06 17:59:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-12-06 17:59:22,784 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 108 [2021-12-06 17:59:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:22,785 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-12-06 17:59:22,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 63 states have internal predecessors, (207), 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) [2021-12-06 17:59:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-12-06 17:59:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 17:59:22,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:22,786 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:22,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 17:59:22,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:59:22,987 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 17:59:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1406291973, now seen corresponding path program 11 times [2021-12-06 17:59:22,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:59:22,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036455122] [2021-12-06 17:59:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:59:22,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:59:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:59:22,994 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:59:22,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 17:59:23,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-06 17:59:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 17:59:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:23,831 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 8 treesize of output 7 [2021-12-06 17:59:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 16 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:43,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:59:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036455122] [2021-12-06 17:59:43,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036455122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:43,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:43,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 66 [2021-12-06 17:59:43,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702085650] [2021-12-06 17:59:43,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:43,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 17:59:43,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:59:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 17:59:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=3641, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 17:59:43,319 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 66 states, 66 states have (on average 3.484848484848485) internal successors, (230), 66 states have internal predecessors, (230), 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) [2021-12-06 18:00:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:26,822 INFO L93 Difference]: Finished difference Result 315 states and 335 transitions. [2021-12-06 18:00:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:00:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.484848484848485) internal successors, (230), 66 states have internal predecessors, (230), 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 116 [2021-12-06 18:00:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:26,825 INFO L225 Difference]: With dead ends: 315 [2021-12-06 18:00:26,825 INFO L226 Difference]: Without dead ends: 269 [2021-12-06 18:00:26,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=2306, Invalid=10804, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 18:00:26,826 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 320 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 3430 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 3430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:26,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 1149 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 3430 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2021-12-06 18:00:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-06 18:00:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2021-12-06 18:00:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 264 states have (on average 1.0871212121212122) internal successors, (287), 265 states have internal predecessors, (287), 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) [2021-12-06 18:00:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 287 transitions. [2021-12-06 18:00:26,830 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 287 transitions. Word has length 116 [2021-12-06 18:00:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:26,830 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 287 transitions. [2021-12-06 18:00:26,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.484848484848485) internal successors, (230), 66 states have internal predecessors, (230), 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) [2021-12-06 18:00:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 287 transitions. [2021-12-06 18:00:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:00:26,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:26,831 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:26,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 18:00:27,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:00:27,032 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 18:00:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 284133576, now seen corresponding path program 12 times [2021-12-06 18:00:27,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:00:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927778424] [2021-12-06 18:00:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:00:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:00:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:00:27,038 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:00:27,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 18:00:28,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 18:00:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:28,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:00:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:28,215 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 8 treesize of output 7 [2021-12-06 18:00:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 18:00:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 18:00:50,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:00:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927778424] [2021-12-06 18:00:50,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927778424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:50,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:00:50,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2021-12-06 18:00:50,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608112225] [2021-12-06 18:00:50,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:50,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:00:50,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:00:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:00:50,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:00:50,680 INFO L87 Difference]: Start difference. First operand 266 states and 287 transitions. Second operand has 56 states, 55 states have (on average 2.581818181818182) internal successors, (142), 56 states have internal predecessors, (142), 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) [2021-12-06 18:01:04,157 WARN L227 SmtUtils]: Spent 7.84s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:06,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:08,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:10,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:13,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:15,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:17,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:28,155 WARN L227 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:37,628 WARN L227 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:48,540 WARN L227 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:50,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:52,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:54,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:55,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:57,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:01:59,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:01,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:11,161 WARN L227 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:19,015 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:27,234 WARN L227 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 181 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:29,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:31,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:33,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:35,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:37,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:39,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:47,225 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 169 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:55,063 WARN L227 SmtUtils]: Spent 6.63s on a formula simplification that was a NOOP. DAG size: 174 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:03:03,276 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:03:05,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:03:07,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:03:09,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:03:11,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:03:24,778 WARN L227 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:03:33,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:03:51,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:04:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:55,490 INFO L93 Difference]: Finished difference Result 322 states and 342 transitions. [2021-12-06 18:04:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 18:04:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.581818181818182) internal successors, (142), 56 states have internal predecessors, (142), 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 120 [2021-12-06 18:04:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:55,493 INFO L225 Difference]: With dead ends: 322 [2021-12-06 18:04:55,493 INFO L226 Difference]: Without dead ends: 322 [2021-12-06 18:04:55,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 205.0s TimeCoverageRelationStatistics Valid=4555, Invalid=11701, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:04:55,496 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 560 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 263 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 54.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:55,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 462 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1118 Invalid, 23 Unknown, 57 Unchecked, 54.5s Time] [2021-12-06 18:04:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-06 18:04:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 259. [2021-12-06 18:04:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.0856031128404668) internal successors, (279), 258 states have internal predecessors, (279), 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) [2021-12-06 18:04:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 279 transitions. [2021-12-06 18:04:55,501 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 279 transitions. Word has length 120 [2021-12-06 18:04:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:55,502 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 279 transitions. [2021-12-06 18:04:55,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.581818181818182) internal successors, (142), 56 states have internal predecessors, (142), 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) [2021-12-06 18:04:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 279 transitions. [2021-12-06 18:04:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 18:04:55,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:55,503 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1] [2021-12-06 18:04:55,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 18:04:55,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:55,704 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-06 18:04:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash 951485029, now seen corresponding path program 5 times [2021-12-06 18:04:55,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:55,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327820240] [2021-12-06 18:04:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:04:55,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:55,711 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:55,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85ca88a0-ef87-47f1-8002-58aa3588451d/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 18:04:58,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-06 18:04:58,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:04:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:04:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:58,430 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 8 treesize of output 7 [2021-12-06 18:05:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:01,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:32,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:05:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327820240] [2021-12-06 18:05:32,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327820240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:05:32,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:05:32,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2021-12-06 18:05:32,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029372365] [2021-12-06 18:05:32,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:32,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 18:05:32,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:05:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 18:05:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=4701, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 18:05:32,729 INFO L87 Difference]: Start difference. First operand 259 states and 279 transitions. Second operand has 80 states, 79 states have (on average 3.2658227848101267) internal successors, (258), 80 states have internal predecessors, (258), 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) [2021-12-06 18:06:37,091 WARN L227 SmtUtils]: Spent 56.17s on a formula simplification that was a NOOP. DAG size: 343 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:06:39,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:06:40,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:06:42,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:06:44,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:06:46,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:07:40,093 WARN L227 SmtUtils]: Spent 52.35s on a formula simplification that was a NOOP. DAG size: 340 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)