./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:58:42,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:58:42,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:58:42,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:58:42,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:58:42,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:58:42,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:58:42,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:58:42,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:58:42,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:58:42,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:58:42,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:58:42,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:58:42,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:58:42,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:58:42,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:58:42,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:58:42,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:58:42,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:58:42,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:58:42,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:58:42,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:58:42,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:58:42,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:58:42,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:58:42,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:58:42,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:58:42,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:58:42,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:58:42,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:58:42,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:58:42,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:58:42,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:58:42,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:58:42,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:58:42,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:58:42,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:58:42,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:58:42,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:58:42,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:58:42,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:58:42,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 06:58:43,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:58:43,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:58:43,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:58:43,043 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:58:43,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:58:43,044 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:58:43,044 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:58:43,044 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:58:43,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:58:43,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:58:43,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:58:43,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:58:43,047 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:58:43,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:58:43,047 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:58:43,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 06:58:43,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 06:58:43,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:58:43,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:58:43,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 06:58:43,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:58:43,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:58:43,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:58:43,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 06:58:43,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 06:58:43,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 06:58:43,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:58:43,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:58:43,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:58:43,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:58:43,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:58:43,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:58:43,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:43,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:58:43,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:58:43,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:58:43,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:58:43,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:58:43,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:58:43,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-13 06:58:43,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:58:43,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:58:43,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:58:43,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:58:43,360 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:58:43,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 06:58:43,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/7ef03dfa7/c63bc39b1e3448b19c916cbc309ce538/FLAG2aa88e4aa [2021-10-13 06:58:44,028 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:58:44,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 06:58:44,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/7ef03dfa7/c63bc39b1e3448b19c916cbc309ce538/FLAG2aa88e4aa [2021-10-13 06:58:44,343 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/7ef03dfa7/c63bc39b1e3448b19c916cbc309ce538 [2021-10-13 06:58:44,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:58:44,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:58:44,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:44,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:58:44,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:58:44,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:44,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757f9cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44, skipping insertion in model container [2021-10-13 06:58:44,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:44,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:58:44,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:58:44,732 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 06:58:44,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:44,743 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:58:44,828 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 06:58:44,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:44,877 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:58:44,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44 WrapperNode [2021-10-13 06:58:44,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:44,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:44,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:58:44,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:58:44,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:44,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:44,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:44,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:58:44,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:58:44,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:58:44,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:44,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:58:45,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:58:45,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:58:45,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:58:45,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (1/1) ... [2021-10-13 06:58:45,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:45,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:58:45,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:58:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:58:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:58:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:58:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:58:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:58:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:58:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:58:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 06:58:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:58:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:58:45,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:58:45,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:58:45,917 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 06:58:45,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:45 BoogieIcfgContainer [2021-10-13 06:58:45,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:58:45,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:58:45,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:58:45,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:58:45,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:58:44" (1/3) ... [2021-10-13 06:58:45,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58228c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:45, skipping insertion in model container [2021-10-13 06:58:45,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:44" (2/3) ... [2021-10-13 06:58:45,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58228c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:45, skipping insertion in model container [2021-10-13 06:58:45,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:45" (3/3) ... [2021-10-13 06:58:45,931 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-13 06:58:45,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:58:45,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-13 06:58:45,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:58:46,001 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, mConcurrency=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 [2021-10-13 06:58:46,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-13 06:58:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 36 states have (on average 2.388888888888889) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:58:46,029 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:46,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:58:46,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:46,037 INFO L82 PathProgramCache]: Analyzing trace with hash 5879945, now seen corresponding path program 1 times [2021-10-13 06:58:46,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:46,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511661844] [2021-10-13 06:58:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:46,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:46,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:46,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511661844] [2021-10-13 06:58:46,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511661844] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:46,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:46,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:58:46,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029265795] [2021-10-13 06:58:46,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:46,319 INFO L87 Difference]: Start difference. First operand has 78 states, 36 states have (on average 2.388888888888889) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:46,543 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-10-13 06:58:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:46,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-13 06:58:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:46,556 INFO L225 Difference]: With dead ends: 133 [2021-10-13 06:58:46,557 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 06:58:46,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 06:58:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2021-10-13 06:58:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 2.264705882352941) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-10-13 06:58:46,602 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 4 [2021-10-13 06:58:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:46,603 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-10-13 06:58:46,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-10-13 06:58:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:58:46,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:46,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:58:46,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:58:46,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 5879946, now seen corresponding path program 1 times [2021-10-13 06:58:46,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:46,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727742048] [2021-10-13 06:58:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:46,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:46,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:46,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727742048] [2021-10-13 06:58:46,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727742048] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:46,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:46,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:58:46,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516106237] [2021-10-13 06:58:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:46,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:46,692 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:46,879 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-10-13 06:58:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-13 06:58:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:46,883 INFO L225 Difference]: With dead ends: 128 [2021-10-13 06:58:46,887 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 06:58:46,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 06:58:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2021-10-13 06:58:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-13 06:58:46,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 4 [2021-10-13 06:58:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:46,906 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-13 06:58:46,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-13 06:58:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:58:46,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:46,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:58:46,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:58:46,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 6034729, now seen corresponding path program 1 times [2021-10-13 06:58:46,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:46,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789241767] [2021-10-13 06:58:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:46,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:47,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:47,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789241767] [2021-10-13 06:58:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789241767] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:47,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:58:47,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68773904] [2021-10-13 06:58:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:47,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:47,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:47,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:47,017 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:47,028 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-13 06:58:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-13 06:58:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:47,030 INFO L225 Difference]: With dead ends: 79 [2021-10-13 06:58:47,030 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 06:58:47,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 06:58:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-10-13 06:58:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 2.142857142857143) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-10-13 06:58:47,038 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2021-10-13 06:58:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:47,039 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-10-13 06:58:47,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-10-13 06:58:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:58:47,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:47,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:47,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 06:58:47,041 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:47,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1413781069, now seen corresponding path program 1 times [2021-10-13 06:58:47,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:47,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400605862] [2021-10-13 06:58:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:47,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:47,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:47,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400605862] [2021-10-13 06:58:47,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400605862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:47,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:47,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:58:47,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432376033] [2021-10-13 06:58:47,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:47,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:47,138 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-10-13 06:58:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:47,158 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-10-13 06:58:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2021-10-13 06:58:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:47,160 INFO L225 Difference]: With dead ends: 76 [2021-10-13 06:58:47,160 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 06:58:47,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 06:58:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-10-13 06:58:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 40 states have (on average 2.0) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-10-13 06:58:47,168 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 8 [2021-10-13 06:58:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:47,168 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-10-13 06:58:47,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-10-13 06:58:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-10-13 06:58:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:58:47,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:47,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:47,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 06:58:47,170 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1507454465, now seen corresponding path program 1 times [2021-10-13 06:58:47,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:47,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661681941] [2021-10-13 06:58:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:47,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:47,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:47,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661681941] [2021-10-13 06:58:47,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661681941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:58:47,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579371336] [2021-10-13 06:58:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:47,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:47,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:47,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:58:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:47,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:58:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:47,493 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 [2021-10-13 06:58:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:58:47,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:58:47,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579371336] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:47,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:58:47,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2021-10-13 06:58:47,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377849545] [2021-10-13 06:58:47,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:47,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:58:47,580 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:47,662 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-10-13 06:58:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 06:58:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:47,667 INFO L225 Difference]: With dead ends: 82 [2021-10-13 06:58:47,667 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 06:58:47,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:58:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 06:58:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-13 06:58:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.925) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-10-13 06:58:47,688 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 11 [2021-10-13 06:58:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:47,688 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-10-13 06:58:47,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-10-13 06:58:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:58:47,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:47,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:47,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:47,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:47,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1507454466, now seen corresponding path program 1 times [2021-10-13 06:58:47,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:47,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331126624] [2021-10-13 06:58:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:47,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:48,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:48,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331126624] [2021-10-13 06:58:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331126624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:58:48,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814388447] [2021-10-13 06:58:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:48,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:48,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 06:58:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:58:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:48,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814388447] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:48,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605747310] [2021-10-13 06:58:48,271 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 06:58:48,271 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:58:48,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:58:48,282 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:58:48,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:58:48,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,347 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:58:48,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:58:48,355 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:58:48,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 06:58:48,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-13 06:58:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:58:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:58:48,434 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 06:58:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 06:58:48,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:58:48,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:58:48,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:58:48,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:58:48,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:48,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 06:58:48,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:58:48,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:134, output treesize:122 [2021-10-13 06:58:48,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:48,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 06:58:48,692 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_79| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:58:48,695 INFO L168 Benchmark]: Toolchain (without parser) took 4347.44 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 75.7 MB in the beginning and 66.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,695 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:58:48,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.49 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 75.3 MB in the end (delta: 156.5 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.52 ms. Allocated memory is still 109.1 MB. Free memory was 75.3 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,697 INFO L168 Benchmark]: Boogie Preprocessor took 74.50 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 71.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,697 INFO L168 Benchmark]: RCFGBuilder took 874.84 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.2 MB in the beginning and 115.9 MB in the end (delta: -44.6 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,698 INFO L168 Benchmark]: TraceAbstraction took 2770.97 ms. Allocated memory is still 144.7 MB. Free memory was 115.9 MB in the beginning and 66.3 MB in the end (delta: 49.6 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:48,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 529.49 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 75.3 MB in the end (delta: 156.5 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 90.52 ms. Allocated memory is still 109.1 MB. Free memory was 75.3 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.50 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 71.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 874.84 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.2 MB in the beginning and 115.9 MB in the end (delta: -44.6 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2770.97 ms. Allocated memory is still 144.7 MB. Free memory was 115.9 MB in the beginning and 66.3 MB in the end (delta: 49.6 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_79| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_79|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:58:48,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:58:51,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:58:51,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:58:51,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:58:51,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:58:51,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:58:51,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:58:51,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:58:51,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:58:51,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:58:51,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:58:51,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:58:51,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:58:51,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:58:51,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:58:51,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:58:51,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:58:51,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:58:51,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:58:51,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:58:51,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:58:51,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:58:51,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:58:51,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:58:51,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:58:51,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:58:51,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:58:51,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:58:51,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:58:51,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:58:51,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:58:51,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:58:51,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:58:51,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:58:51,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:58:51,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:58:51,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:58:51,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:58:51,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:58:51,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:58:51,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:58:51,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 06:58:51,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:58:51,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:58:51,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:58:51,526 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:58:51,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:58:51,527 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:58:51,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:58:51,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:58:51,527 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:58:51,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 06:58:51,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 06:58:51,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:58:51,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:58:51,531 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 06:58:51,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:58:51,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:58:51,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:58:51,531 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 06:58:51,532 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 06:58:51,532 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 06:58:51,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:58:51,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:58:51,532 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:58:51,533 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:58:51,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:58:51,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:58:51,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:58:51,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:58:51,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:58:51,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:51,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:58:51,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:58:51,535 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:58:51,535 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:51,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:58:51,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:58:51,536 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_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-13 06:58:51,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:58:51,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:58:51,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:58:52,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:58:52,001 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:58:52,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 06:58:52,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/1466b347d/6743beeb964042bea031e9d34e5a9b10/FLAG8549f2a85 [2021-10-13 06:58:52,733 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:58:52,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-13 06:58:52,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/1466b347d/6743beeb964042bea031e9d34e5a9b10/FLAG8549f2a85 [2021-10-13 06:58:53,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/data/1466b347d/6743beeb964042bea031e9d34e5a9b10 [2021-10-13 06:58:53,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:58:53,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:58:53,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:53,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:58:53,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:58:53,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242642e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53, skipping insertion in model container [2021-10-13 06:58:53,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:58:53,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:58:53,620 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 06:58:53,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:53,649 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:58:53,731 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-13 06:58:53,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:53,785 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:58:53,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53 WrapperNode [2021-10-13 06:58:53,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:53,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:53,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:58:53,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:58:53,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:53,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:58:53,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:58:53,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:58:53,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:58:53,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:58:53,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:58:53,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:58:53,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (1/1) ... [2021-10-13 06:58:53,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:53,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:58:54,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:58:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:58:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:58:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:58:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:58:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:58:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:58:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:58:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 06:58:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:58:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:58:54,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:58:54,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:58:54,850 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 06:58:54,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:54 BoogieIcfgContainer [2021-10-13 06:58:54,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:58:54,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:58:54,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:58:54,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:58:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:58:53" (1/3) ... [2021-10-13 06:58:54,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785ea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:54, skipping insertion in model container [2021-10-13 06:58:54,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:53" (2/3) ... [2021-10-13 06:58:54,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785ea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:54, skipping insertion in model container [2021-10-13 06:58:54,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:54" (3/3) ... [2021-10-13 06:58:54,862 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-13 06:58:54,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:58:54,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-13 06:58:54,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:58:54,930 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, mConcurrency=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 [2021-10-13 06:58:54,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-13 06:58:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 90 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) [2021-10-13 06:58:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:58:54,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:54,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:58:54,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2021-10-13 06:58:54,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:54,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447501959] [2021-10-13 06:58:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:54,981 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:54,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:55,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:58:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:58:55,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:55,297 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 [2021-10-13 06:58:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:55,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:55,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:55,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447501959] [2021-10-13 06:58:55,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447501959] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:55,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:55,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:58:55,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998903505] [2021-10-13 06:58:55,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:55,418 INFO L87 Difference]: Start difference. First operand has 91 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 90 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:55,908 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2021-10-13 06:58:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-13 06:58:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:55,931 INFO L225 Difference]: With dead ends: 157 [2021-10-13 06:58:55,932 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 06:58:55,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 06:58:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 84. [2021-10-13 06:58:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.934782608695652) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-10-13 06:58:56,003 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2021-10-13 06:58:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-10-13 06:58:56,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-10-13 06:58:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:58:56,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:56,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:58:56,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:56,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:56,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2021-10-13 06:58:56,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:56,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403719719] [2021-10-13 06:58:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:56,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:56,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:56,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:58:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:56,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:58:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:56,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:58:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:56,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:56,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403719719] [2021-10-13 06:58:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403719719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:56,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:56,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 06:58:56,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934353542] [2021-10-13 06:58:56,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:58:56,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:58:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:56,481 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-13 06:58:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:57,166 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2021-10-13 06:58:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-10-13 06:58:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:57,174 INFO L225 Difference]: With dead ends: 151 [2021-10-13 06:58:57,174 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 06:58:57,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 06:58:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2021-10-13 06:58:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-10-13 06:58:57,192 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2021-10-13 06:58:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:57,194 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-10-13 06:58:57,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-13 06:58:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-10-13 06:58:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 06:58:57,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:57,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:57,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:57,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:57,410 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1809644651, now seen corresponding path program 1 times [2021-10-13 06:58:57,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:57,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453965253] [2021-10-13 06:58:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:57,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:57,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:57,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:58:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:58:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:57,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:57,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:57,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453965253] [2021-10-13 06:58:57,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453965253] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:57,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:57,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:58:57,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551953250] [2021-10-13 06:58:57,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:58:57,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:58:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:57,558 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:57,579 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-10-13 06:58:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:58:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 06:58:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:57,581 INFO L225 Difference]: With dead ends: 92 [2021-10-13 06:58:57,581 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 06:58:57,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 06:58:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-10-13 06:58:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 89 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-10-13 06:58:57,590 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 7 [2021-10-13 06:58:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:57,591 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-10-13 06:58:57,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-10-13 06:58:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:58:57,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:57,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:57,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:57,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:57,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 671668623, now seen corresponding path program 1 times [2021-10-13 06:58:57,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:57,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698947374] [2021-10-13 06:58:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:57,815 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:57,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:57,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:58:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:58:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:58,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:58,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698947374] [2021-10-13 06:58:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698947374] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:58,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:58,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:58:58,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047277012] [2021-10-13 06:58:58,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:58:58,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:58:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:58,121 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:58,157 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-10-13 06:58:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:58:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-10-13 06:58:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:58,162 INFO L225 Difference]: With dead ends: 90 [2021-10-13 06:58:58,162 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 06:58:58,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:58:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 06:58:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-10-13 06:58:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 88 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-10-13 06:58:58,170 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 9 [2021-10-13 06:58:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:58,170 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-10-13 06:58:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:58:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-10-13 06:58:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:58:58,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:58,172 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:58,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:58,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:58,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:58:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1971466659, now seen corresponding path program 1 times [2021-10-13 06:58:58,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:58,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2448356] [2021-10-13 06:58:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:58,386 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:58,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:58,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:58:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:58:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:58,548 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 [2021-10-13 06:58:58,660 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 06:58:58,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 06:58:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:59,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:06,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:06,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2448356] [2021-10-13 06:59:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2448356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:07,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133558316] [2021-10-13 06:59:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:07,009 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:07,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:07,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:59:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:59:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:07,293 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 [2021-10-13 06:59:07,365 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 06:59:07,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-10-13 06:59:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:07,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:07,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133558316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:07,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632172929] [2021-10-13 06:59:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:07,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:07,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:07,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:59:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:59:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:07,700 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 [2021-10-13 06:59:07,772 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 06:59:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 06:59:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:08,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:14,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632172929] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:14,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:59:14,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3, 3, 4, 4] total 6 [2021-10-13 06:59:14,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431326987] [2021-10-13 06:59:14,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 06:59:14,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 06:59:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-10-13 06:59:14,256 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:14,749 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-10-13 06:59:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 06:59:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:14,751 INFO L225 Difference]: With dead ends: 100 [2021-10-13 06:59:14,751 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 06:59:14,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 13951.2ms TimeCoverageRelationStatistics Valid=29, Invalid=41, Unknown=2, NotChecked=0, Total=72 [2021-10-13 06:59:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 06:59:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2021-10-13 06:59:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 87 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-10-13 06:59:14,759 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 16 [2021-10-13 06:59:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:14,759 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-10-13 06:59:14,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-10-13 06:59:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:59:14,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:14,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:14,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:14,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:15,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:15,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1971466660, now seen corresponding path program 1 times [2021-10-13 06:59:15,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:15,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418389836] [2021-10-13 06:59:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:15,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:15,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:15,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:59:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:59:15,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:15,622 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 [2021-10-13 06:59:15,629 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 [2021-10-13 06:59:15,785 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 06:59:15,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-13 06:59:15,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:59:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-10-13 06:59:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:16,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:18,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:18,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418389836] [2021-10-13 06:59:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418389836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:18,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [860870906] [2021-10-13 06:59:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:18,925 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:18,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 06:59:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:59:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:19,271 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 [2021-10-13 06:59:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:59:19,428 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 06:59:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 06:59:19,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:59:19,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-13 06:59:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:19,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [860870906] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:23,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889538198] [2021-10-13 06:59:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:23,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:23,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:23,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 06:59:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:23,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:59:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:23,400 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 [2021-10-13 06:59:23,411 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 [2021-10-13 06:59:23,576 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 06:59:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 06:59:23,595 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:59:23,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-13 06:59:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:23,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889538198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:26,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:59:26,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 06:59:26,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239667697] [2021-10-13 06:59:26,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:59:26,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:59:26,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-10-13 06:59:26,544 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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) [2021-10-13 06:59:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:31,528 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-10-13 06:59:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 06:59:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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 [2021-10-13 06:59:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:31,530 INFO L225 Difference]: With dead ends: 113 [2021-10-13 06:59:31,530 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 06:59:31,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7813.1ms TimeCoverageRelationStatistics Valid=41, Invalid=68, Unknown=1, NotChecked=0, Total=110 [2021-10-13 06:59:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 06:59:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-10-13 06:59:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 86 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-10-13 06:59:31,536 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 16 [2021-10-13 06:59:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-10-13 06:59:31,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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) [2021-10-13 06:59:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-10-13 06:59:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 06:59:31,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:31,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:31,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:31,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:31,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:32,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:32,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1895030251, now seen corresponding path program 1 times [2021-10-13 06:59:32,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:32,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466643566] [2021-10-13 06:59:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:32,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:32,143 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:59:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:32,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:32,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:32,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:32,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466643566] [2021-10-13 06:59:32,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466643566] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:32,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692044899] [2021-10-13 06:59:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:32,528 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:32,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:32,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 06:59:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:32,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:32,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692044899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:32,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592575911] [2021-10-13 06:59:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:32,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:32,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:32,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:33,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 06:59:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:33,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:33,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592575911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:33,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:59:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-13 06:59:33,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085174318] [2021-10-13 06:59:33,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:33,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:33,406 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:33,528 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-10-13 06:59:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-13 06:59:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:33,530 INFO L225 Difference]: With dead ends: 87 [2021-10-13 06:59:33,530 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 06:59:33,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 06:59:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-13 06:59:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 86 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-10-13 06:59:33,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 21 [2021-10-13 06:59:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:33,535 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-10-13 06:59:33,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-10-13 06:59:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 06:59:33,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:33,536 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:33,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:33,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:33,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 06:59:34,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:34,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:34,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1765778069, now seen corresponding path program 1 times [2021-10-13 06:59:34,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:34,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131461205] [2021-10-13 06:59:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:34,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:34,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:34,139 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:34,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 06:59:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:34,459 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 [2021-10-13 06:59:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:34,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:34,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:34,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131461205] [2021-10-13 06:59:34,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131461205] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:34,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:34,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:59:34,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336111284] [2021-10-13 06:59:34,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:34,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:34,516 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:34,709 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-13 06:59:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 06:59:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:34,710 INFO L225 Difference]: With dead ends: 96 [2021-10-13 06:59:34,710 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 06:59:34,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 06:59:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-10-13 06:59:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-10-13 06:59:34,715 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 22 [2021-10-13 06:59:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:34,715 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-10-13 06:59:34,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-10-13 06:59:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 06:59:34,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:34,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:34,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 06:59:34,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:34,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1765778068, now seen corresponding path program 1 times [2021-10-13 06:59:34,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:34,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787587797] [2021-10-13 06:59:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:34,933 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:34,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:34,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 06:59:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:35,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:35,218 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 [2021-10-13 06:59:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:35,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:35,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:35,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787587797] [2021-10-13 06:59:35,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787587797] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:35,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:35,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 06:59:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826018546] [2021-10-13 06:59:35,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:35,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:35,355 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:35,593 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-10-13 06:59:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:35,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 06:59:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:35,595 INFO L225 Difference]: With dead ends: 81 [2021-10-13 06:59:35,595 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 06:59:35,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 06:59:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-13 06:59:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-10-13 06:59:35,599 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 22 [2021-10-13 06:59:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:35,599 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-10-13 06:59:35,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-10-13 06:59:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 06:59:35,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:35,600 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:35,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:35,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:35,810 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash 199703601, now seen corresponding path program 1 times [2021-10-13 06:59:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102867294] [2021-10-13 06:59:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:35,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:35,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:35,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 06:59:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:59:36,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:36,161 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 [2021-10-13 06:59:36,224 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 06:59:36,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 06:59:36,543 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 06:59:36,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-10-13 06:59:37,170 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 06:59:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 53 [2021-10-13 06:59:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:37,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:40,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102867294] [2021-10-13 06:59:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102867294] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:59:40,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:59:40,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 06:59:40,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006680614] [2021-10-13 06:59:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:59:40,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:59:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=58, Unknown=1, NotChecked=0, Total=90 [2021-10-13 06:59:40,200 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2021-10-13 06:59:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:40,652 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-10-13 06:59:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 06:59:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:40,654 INFO L225 Difference]: With dead ends: 87 [2021-10-13 06:59:40,654 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 06:59:40,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2319.0ms TimeCoverageRelationStatistics Valid=37, Invalid=72, Unknown=1, NotChecked=0, Total=110 [2021-10-13 06:59:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 06:59:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-10-13 06:59:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 74 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) [2021-10-13 06:59:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-10-13 06:59:40,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 27 [2021-10-13 06:59:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:40,658 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-10-13 06:59:40,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2021-10-13 06:59:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-10-13 06:59:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 06:59:40,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:40,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:40,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:40,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:40,870 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash 199703602, now seen corresponding path program 1 times [2021-10-13 06:59:40,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:40,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378954823] [2021-10-13 06:59:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:40,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:40,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:40,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 06:59:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 06:59:41,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:41,256 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 [2021-10-13 06:59:41,270 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 [2021-10-13 06:59:41,342 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 06:59:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 06:59:41,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:59:41,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 06:59:41,603 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 06:59:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-10-13 06:59:42,341 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 06:59:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-10-13 06:59:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:42,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:46,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:46,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378954823] [2021-10-13 06:59:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378954823] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:59:46,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:59:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 06:59:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247759137] [2021-10-13 06:59:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:59:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:59:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2021-10-13 06:59:46,422 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2021-10-13 06:59:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:47,685 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-10-13 06:59:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 06:59:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:47,687 INFO L225 Difference]: With dead ends: 69 [2021-10-13 06:59:47,687 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 06:59:47,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2811.7ms TimeCoverageRelationStatistics Valid=36, Invalid=73, Unknown=1, NotChecked=0, Total=110 [2021-10-13 06:59:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 06:59:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 06:59:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 68 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) [2021-10-13 06:59:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-13 06:59:47,690 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 27 [2021-10-13 06:59:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:47,691 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-13 06:59:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2021-10-13 06:59:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-13 06:59:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 06:59:47,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:47,692 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:47,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 06:59:47,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:47,898 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1895844371, now seen corresponding path program 1 times [2021-10-13 06:59:47,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:47,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632426077] [2021-10-13 06:59:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:47,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:47,900 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:47,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 06:59:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:48,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:48,326 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 [2021-10-13 06:59:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:48,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:48,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:48,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632426077] [2021-10-13 06:59:48,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632426077] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:48,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:48,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 06:59:48,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822582245] [2021-10-13 06:59:48,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:59:48,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:59:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:48,500 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) [2021-10-13 06:59:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:48,815 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-10-13 06:59:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 28 [2021-10-13 06:59:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:48,816 INFO L225 Difference]: With dead ends: 80 [2021-10-13 06:59:48,816 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 06:59:48,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:59:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 06:59:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-10-13 06:59:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-13 06:59:48,818 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 28 [2021-10-13 06:59:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:48,819 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-13 06:59:48,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-13 06:59:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 06:59:48,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:48,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:48,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:49,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:49,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1895844372, now seen corresponding path program 1 times [2021-10-13 06:59:49,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:49,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197632836] [2021-10-13 06:59:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:49,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:49,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:49,033 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:49,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 06:59:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:59:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:49,493 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 [2021-10-13 06:59:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:49,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:59:49,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:49,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197632836] [2021-10-13 06:59:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197632836] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:49,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:49,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 06:59:49,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038110067] [2021-10-13 06:59:49,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:59:49,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:59:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:59:49,947 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:50,495 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-10-13 06:59:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 28 [2021-10-13 06:59:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:50,498 INFO L225 Difference]: With dead ends: 67 [2021-10-13 06:59:50,498 INFO L226 Difference]: Without dead ends: 67 [2021-10-13 06:59:50,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:59:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-13 06:59:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-13 06:59:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-10-13 06:59:50,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 28 [2021-10-13 06:59:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:50,501 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-10-13 06:59:50,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-10-13 06:59:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 06:59:50,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:50,503 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:50,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:50,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:50,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 06:59:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1740473348, now seen corresponding path program 1 times [2021-10-13 06:59:50,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:50,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24212172] [2021-10-13 06:59:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:50,705 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:50,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:50,708 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:50,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 06:59:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 06:59:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:51,362 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 [2021-10-13 06:59:51,596 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-13 06:59:51,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-10-13 06:59:51,802 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 06:59:51,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 47 [2021-10-13 06:59:52,202 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-13 06:59:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 72 [2021-10-13 06:59:53,040 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 06:59:53,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 82 [2021-10-13 06:59:59,623 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 06:59:59,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 115 [2021-10-13 07:00:01,642 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:00:01,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 56 [2021-10-13 07:00:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:00:01,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:03,987 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))))))) (_ bv1 1)))) is different from false [2021-10-13 07:00:06,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))))))))) (_ bv1 1)))) is different from false [2021-10-13 07:00:16,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:16,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:00:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1452 treesize of output 1440 [2021-10-13 07:01:13,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:13,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 272 [2021-10-13 07:01:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:16,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:16,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24212172] [2021-10-13 07:01:16,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24212172] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:16,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:16,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2021-10-13 07:01:16,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151692675] [2021-10-13 07:01:16,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:01:16,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:01:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=443, Unknown=22, NotChecked=90, Total=650 [2021-10-13 07:01:16,941 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:35,360 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-10-13 07:01:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:01:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:01:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:35,362 INFO L225 Difference]: With dead ends: 79 [2021-10-13 07:01:35,362 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 07:01:35,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 56927.3ms TimeCoverageRelationStatistics Valid=293, Invalid=815, Unknown=22, NotChecked=130, Total=1260 [2021-10-13 07:01:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 07:01:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2021-10-13 07:01:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-13 07:01:35,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 33 [2021-10-13 07:01:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:35,367 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-13 07:01:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-13 07:01:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:01:35,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:35,368 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:35,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:35,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:01:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1740473347, now seen corresponding path program 1 times [2021-10-13 07:01:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:35,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864252171] [2021-10-13 07:01:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:35,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:35,582 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:35,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:01:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 07:01:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:36,369 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 [2021-10-13 07:01:36,383 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 [2021-10-13 07:01:36,737 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:01:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:01:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 07:01:36,913 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:01:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:01:37,004 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:01:37,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2021-10-13 07:01:37,283 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-13 07:01:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 61 [2021-10-13 07:01:37,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:01:37,502 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 07:01:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:01:37,876 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 07:01:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 111 [2021-10-13 07:01:38,020 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 07:01:38,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 107 [2021-10-13 07:01:52,193 WARN L207 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-10-13 07:01:52,194 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 07:01:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 146 [2021-10-13 07:01:55,304 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 07:01:55,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 143 [2021-10-13 07:01:58,217 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:01:58,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 79 [2021-10-13 07:01:58,308 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:01:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 65 [2021-10-13 07:01:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:58,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:00,933 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~new_head~1.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) is different from false [2021-10-13 07:02:03,010 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd (_ bv12 32) .cse0)))) (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset))) (bvule (bvadd (_ bv12 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) is different from false [2021-10-13 07:02:14,263 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:14,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:02:14,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:14,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:02:55,729 WARN L207 SmtUtils]: Spent 5.88 s on a formula simplification that was a NOOP. DAG size: 48 [2021-10-13 07:03:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3821 treesize of output 3801 [2021-10-13 07:03:24,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 523330 treesize of output 519166 [2021-10-13 07:03:30,872 WARN L207 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 710 DAG size of output: 710 [2021-10-13 07:03:32,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:03:32,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864252171] [2021-10-13 07:03:32,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:03:32,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348079318] [2021-10-13 07:03:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:03:32,913 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:03:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:03:32,916 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:03:32,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 07:03:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:03:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:03:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:03:34,121 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 [2021-10-13 07:03:34,131 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 [2021-10-13 07:03:34,919 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:03:34,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:03:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 07:03:35,205 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:03:35,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2021-10-13 07:03:35,297 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:03:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:03:35,728 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:03:35,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:03:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:35,826 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-10-13 07:03:35,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 61 [2021-10-13 07:03:36,431 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 07:03:36,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 111 [2021-10-13 07:03:36,531 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 07:03:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 107 [2021-10-13 07:03:45,527 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 07:03:45,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 146 [2021-10-13 07:03:47,838 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 07:03:47,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 143 [2021-10-13 07:03:51,475 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:03:51,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 75 [2021-10-13 07:03:51,535 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:03:51,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2021-10-13 07:03:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:03:51,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:03:51,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:51,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:03:51,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:51,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:04:29,740 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (v_prenex_10 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_prenex_9 (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset)) (.cse2 (bvadd (_ bv4 32) v_prenex_9))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) .cse2 v_prenex_10)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_4) .cse2 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) is different from false [2021-10-13 07:05:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3839 treesize of output 3819 [2021-10-13 07:05:07,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65298 treesize of output 64766 [2021-10-13 07:05:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-13 07:05:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:05:30,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348079318] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:05:30,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:05:30,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2021-10-13 07:05:30,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892388960] [2021-10-13 07:05:30,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:05:30,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:05:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:05:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1088, Unknown=49, NotChecked=216, Total=1560 [2021-10-13 07:05:30,341 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:05:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:05:50,961 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-10-13 07:05:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:05:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:05:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:05:50,963 INFO L225 Difference]: With dead ends: 78 [2021-10-13 07:05:50,963 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 07:05:50,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 174505.2ms TimeCoverageRelationStatistics Valid=494, Invalid=1631, Unknown=49, NotChecked=276, Total=2450 [2021-10-13 07:05:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 07:05:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-10-13 07:05:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:05:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-13 07:05:50,967 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 33 [2021-10-13 07:05:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:05:50,968 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-13 07:05:50,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:05:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-13 07:05:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 07:05:50,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:05:50,970 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:05:50,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:05:51,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-10-13 07:05:51,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:05:51,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:05:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:05:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1329024838, now seen corresponding path program 1 times [2021-10-13 07:05:51,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:05:51,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254039247] [2021-10-13 07:05:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:05:51,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:05:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:05:51,377 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:05:51,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 07:05:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:05:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:05:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:05:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:05:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 07:05:52,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 07:05:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:05:52,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:05:52,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-13 07:05:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:05:53,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:05:53,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254039247] [2021-10-13 07:05:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254039247] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:05:53,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:05:53,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-13 07:05:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164415326] [2021-10-13 07:05:53,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 07:05:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:05:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 07:05:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:05:53,376 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 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) [2021-10-13 07:05:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:05:54,470 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-10-13 07:05:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:05:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 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) Word has length 36 [2021-10-13 07:05:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:05:54,472 INFO L225 Difference]: With dead ends: 96 [2021-10-13 07:05:54,472 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 07:05:54,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:05:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 07:05:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-10-13 07:05:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:05:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-13 07:05:54,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 36 [2021-10-13 07:05:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:05:54,476 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-13 07:05:54,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 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) [2021-10-13 07:05:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-13 07:05:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 07:05:54,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:05:54,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:05:54,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:05:54,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:05:54,686 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:05:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:05:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1329024837, now seen corresponding path program 1 times [2021-10-13 07:05:54,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:05:54,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204030425] [2021-10-13 07:05:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:05:54,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:05:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:05:54,689 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:05:54,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 07:05:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:05:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:05:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:05:55,732 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 [2021-10-13 07:05:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:05:56,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 07:05:56,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 07:05:56,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-13 07:05:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:05:56,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:05:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-13 07:05:56,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:05:56,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:05:56,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:05:56,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:05:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:05:57,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:05:57,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204030425] [2021-10-13 07:05:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204030425] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:05:57,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:05:57,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-13 07:05:57,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163711737] [2021-10-13 07:05:57,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:05:57,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:05:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:05:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:05:57,430 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 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) [2021-10-13 07:05:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:05:59,134 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-10-13 07:05:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:05:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 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) Word has length 36 [2021-10-13 07:05:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:05:59,136 INFO L225 Difference]: With dead ends: 90 [2021-10-13 07:05:59,136 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:05:59,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:05:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:05:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-10-13 07:05:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 67 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) [2021-10-13 07:05:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-10-13 07:05:59,140 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 36 [2021-10-13 07:05:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:05:59,141 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-10-13 07:05:59,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 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) [2021-10-13 07:05:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-10-13 07:05:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:05:59,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:05:59,142 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:05:59,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:05:59,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:05:59,346 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:05:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:05:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1749901707, now seen corresponding path program 1 times [2021-10-13 07:05:59,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:05:59,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064016684] [2021-10-13 07:05:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:05:59,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:05:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:05:59,360 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:05:59,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:06:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:06:00,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:06:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:06:00,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:06:00,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 07:06:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:06:00,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:06:00,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-13 07:06:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:06:00,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:06:00,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064016684] [2021-10-13 07:06:00,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064016684] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:06:00,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:06:00,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-13 07:06:00,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194755053] [2021-10-13 07:06:00,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:06:00,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:06:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:06:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:06:00,741 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:06:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:06:01,333 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-13 07:06:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:06:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 37 [2021-10-13 07:06:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:06:01,335 INFO L225 Difference]: With dead ends: 71 [2021-10-13 07:06:01,335 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 07:06:01,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:06:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 07:06:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-10-13 07:06:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:06:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-13 07:06:01,338 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 37 [2021-10-13 07:06:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:06:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-13 07:06:01,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:06:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-13 07:06:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 07:06:01,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:06:01,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:06:01,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:06:01,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:06:01,540 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:06:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:06:01,540 INFO L82 PathProgramCache]: Analyzing trace with hash -950961311, now seen corresponding path program 1 times [2021-10-13 07:06:01,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:06:01,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446273506] [2021-10-13 07:06:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:06:01,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:06:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:06:01,542 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:06:01,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 07:06:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:06:02,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:06:02,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:06:02,929 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:06:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-10-13 07:06:03,155 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-13 07:06:03,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-10-13 07:06:03,438 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-13 07:06:03,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 44 [2021-10-13 07:06:08,787 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-13 07:06:08,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 69 [2021-10-13 07:06:10,438 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-13 07:06:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-10-13 07:06:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:06:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:06:12,619 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv0 32)))) is different from false [2021-10-13 07:06:25,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:06:25,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-13 07:06:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1569 treesize of output 1549 [2021-10-13 07:06:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:06:49,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:06:49,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446273506] [2021-10-13 07:06:49,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446273506] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:06:49,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:06:49,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 25 [2021-10-13 07:06:49,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760184706] [2021-10-13 07:06:49,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:06:49,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:06:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:06:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=441, Unknown=12, NotChecked=44, Total=600 [2021-10-13 07:06:49,435 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:23,547 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-13 07:07:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:07:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 07:07:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:23,549 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:07:23,549 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 07:07:23,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 54798.3ms TimeCoverageRelationStatistics Valid=311, Invalid=803, Unknown=12, NotChecked=64, Total=1190 [2021-10-13 07:07:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 07:07:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-13 07:07:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-10-13 07:07:23,552 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 40 [2021-10-13 07:07:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:23,553 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-10-13 07:07:23,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-10-13 07:07:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 07:07:23,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:23,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:07:23,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:07:23,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:07:23,770 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-13 07:07:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash 186410219, now seen corresponding path program 1 times [2021-10-13 07:07:23,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:07:23,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644821621] [2021-10-13 07:07:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:23,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:07:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:07:23,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:07:23,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 07:07:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:24,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 07:07:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:24,944 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 [2021-10-13 07:07:25,246 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:07:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:07:25,467 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:07:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-10-13 07:07:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:25,789 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-10-13 07:07:25,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2021-10-13 07:07:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:26,102 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-10-13 07:07:26,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 44 [2021-10-13 07:07:26,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:07:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:26,936 INFO L354 Elim1Store]: treesize reduction 32, result has 50.0 percent of original size [2021-10-13 07:07:26,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2021-10-13 07:07:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:27,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:07:27,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2021-10-13 07:07:27,899 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 07:07:27,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 07:07:28,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:07:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 07:07:28,146 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-13 07:07:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 07:07:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-10-13 07:07:28,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-13 07:07:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-10-13 07:07:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:07:28,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:07:29,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-10-13 07:07:29,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2021-10-13 07:07:29,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:29,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 07:07:30,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:30,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 07:07:59,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:59,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-13 07:08:40,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:40,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-10-13 07:08:40,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8394 treesize of output 8330 [2021-10-13 07:08:40,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:40,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644821621] [2021-10-13 07:08:40,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:08:40,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538355223] [2021-10-13 07:08:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:40,179 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:40,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:40,180 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-13 07:08:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 07:08:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:41,874 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 [2021-10-13 07:08:42,609 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:08:42,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:08:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:42,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-13 07:08:43,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-13 07:08:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:43,609 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-13 07:08:43,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 40 [2021-10-13 07:08:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:08:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:45,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 07:08:45,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:08:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:45,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 14 [2021-10-13 07:08:46,312 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 07:08:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 07:08:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:08:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 07:08:46,740 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-10-13 07:08:46,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 07:08:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-10-13 07:08:47,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-13 07:08:47,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-10-13 07:08:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:08:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-10-13 07:08:47,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2021-10-13 07:08:47,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:47,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 07:08:48,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:48,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 07:08:51,045 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse2 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))) (store .cse0 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse1 .cse2) (and (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))) (store .cse3 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse3 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)) (or (not .cse2) (not .cse1)))))) is different from false [2021-10-13 07:08:53,280 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data~0 (select (select (let ((.cse2 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_int| .cse3 (store (select |c_#memory_int| .cse3) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147)))) (and .cse1 .cse0 (= (select (select (let ((.cse4 (let ((.cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_int| .cse5 (store (select |c_#memory_int| .cse5) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12))))) (store .cse4 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse4 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0))))) is different from false [2021-10-13 07:08:53,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:53,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-13 07:09:27,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse5 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse4 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= (select (select (let ((.cse0 (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 v_DerPreprocessor_13))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse1 .cse2 (store (select .cse1 .cse2) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))))) (store .cse0 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse4 .cse5) (and (or (not .cse5) (not .cse4)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 v_DerPreprocessor_13))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)))))) is different from false [2021-10-13 07:09:51,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 v_DerPreprocessor_13))) (.cse4 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse3 .cse4 (store (select .cse3 .cse4) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0))) (and (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 v_DerPreprocessor_13))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_12)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset) c_ULTIMATE.start_main_~data~0) .cse1 .cse0)))) is different from false [2021-10-13 07:09:51,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19598 treesize of output 19470 [2021-10-13 07:09:51,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:09:51,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23326 [2021-10-13 07:09:51,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:09:51,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130954900] [2021-10-13 07:09:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:09:51,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:09:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:09:51,772 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:09:51,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 07:09:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:09:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 07:09:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:52,882 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 [2021-10-13 07:09:53,144 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:09:53,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-13 07:09:53,880 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 07:09:53,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 57 [2021-10-13 07:09:55,744 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:09:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-10-13 07:09:56,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-10-13 07:09:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 07:09:56,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:09:56,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:56,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-10-13 07:09:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-10-13 07:09:58,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:09:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:09:58,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2021-10-13 07:09:59,215 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 07:09:59,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-10-13 07:09:59,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:09:59,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-10-13 07:09:59,591 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-10-13 07:09:59,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-10-13 07:09:59,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-10-13 07:09:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-13 07:10:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:10:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:10:00,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:10:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-10-13 07:10:00,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2021-10-13 07:10:00,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:00,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 07:10:01,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:01,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 07:10:04,132 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (let ((.cse2 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse0 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and .cse0 (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_16)))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse2) (and (or (not .cse2) (not .cse0)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_16)))) (store .cse3 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse3 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)))))) is different from false [2021-10-13 07:10:19,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:19,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-13 07:10:37,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:10:37,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-10-13 07:10:37,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9078 treesize of output 9014 [2021-10-13 07:10:37,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:10:37,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:10:37,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:10:37,527 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:10:37,528 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:10:37,538 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:10:37,540 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:10:37,541 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:10:37,541 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:10:37,541 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:10:37,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:10:37,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:10:37,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:10:37,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:10:37,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:10:37,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:10:37,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:10:37,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:10:37,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:10:37,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:10:37,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:10:37,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:10:37,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:10:37,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:10:37,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:10:37,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:10:37,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:10:37,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:10:37,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:10:37,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:10:37,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:10:37,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:10:37,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:10:37,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:10:37,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:10:37,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:10:37,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-13 07:10:37,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 07:10:37,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-13 07:10:37,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-13 07:10:37,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-13 07:10:37,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-13 07:10:37,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:37,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:37,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:37,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:10:37,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:37,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:37,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:38,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:10:38,173 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:10:38,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:10:38 BoogieIcfgContainer [2021-10-13 07:10:38,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:10:38,191 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:10:38,191 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:10:38,191 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:10:38,192 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:54" (3/4) ... [2021-10-13 07:10:38,195 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:10:38,196 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:10:38,197 INFO L168 Benchmark]: Toolchain (without parser) took 705187.78 ms. Allocated memory was 52.4 MB in the beginning and 371.2 MB in the end (delta: 318.8 MB). Free memory was 27.4 MB in the beginning and 207.1 MB in the end (delta: -179.7 MB). Peak memory consumption was 138.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,197 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 19.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:10:38,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.14 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 27.1 MB in the beginning and 41.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,198 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.60 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 39.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,199 INFO L168 Benchmark]: Boogie Preprocessor took 81.53 ms. Allocated memory is still 67.1 MB. Free memory was 39.7 MB in the beginning and 37.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,199 INFO L168 Benchmark]: RCFGBuilder took 892.52 ms. Allocated memory is still 67.1 MB. Free memory was 37.8 MB in the beginning and 46.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,200 INFO L168 Benchmark]: TraceAbstraction took 703335.25 ms. Allocated memory was 67.1 MB in the beginning and 371.2 MB in the end (delta: 304.1 MB). Free memory was 45.7 MB in the beginning and 207.1 MB in the end (delta: -161.4 MB). Peak memory consumption was 143.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:38,200 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 371.2 MB. Free memory is still 207.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:10:38,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 19.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 774.14 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 27.1 MB in the beginning and 41.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.60 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 39.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.53 ms. Allocated memory is still 67.1 MB. Free memory was 39.7 MB in the beginning and 37.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 892.52 ms. Allocated memory is still 67.1 MB. Free memory was 37.8 MB in the beginning and 46.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 703335.25 ms. Allocated memory was 67.1 MB in the beginning and 371.2 MB in the end (delta: 304.1 MB). Free memory was 45.7 MB in the beginning and 207.1 MB in the end (delta: -161.4 MB). Peak memory consumption was 143.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.13 ms. Allocated memory is still 371.2 MB. Free memory is still 207.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 638]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 638. Possible FailurePath: [L619] const int len = 2; [L620] const int data = 1; [L621] DLL s = dll_create(len, data); [L586] DLL head = ((void *)0); [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND FALSE !(\read(head)) [L598] head = new_head [L599] len-- [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND TRUE \read(head) [L596] head->prev = new_head [L598] head = new_head [L599] len-- [L587] COND FALSE !(len > 0) [L601] return head; [L621] DLL s = dll_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L611] DLL new_head = node_create(data); [L612] EXPR \read(*head) [L612] new_head->next = *head [L613] EXPR \read(*head) [L613] COND TRUE *head [L614] EXPR \read(*head) [L614] (*head)->prev = new_head [L616] *head = new_head [L623] EXPR \read(s) [L623] DLL ptr = s; [L624] int count = 0; [L625] COND TRUE \read(ptr) [L626] EXPR ptr->next [L626] DLL temp = ptr->next; [L627] EXPR ptr->data [L627] COND TRUE data != ptr->data [L638] reach_error() - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 91 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 703251.7ms, OverallIterations: 20, TraceHistogramMax: 2, EmptinessCheckTime: 28.8ms, AutomataDifference: 86495.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1023 SDtfs, 3332 SDslu, 1283 SDs, 0 SdLazy, 1966 SolverSat, 198 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 57532.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1163 GetRequests, 935 SyntacticMatches, 11 SemanticMatches, 217 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 315715.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=0, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 133.8ms AutomataMinimizationTime, 19 MinimizatonAttempts, 296 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 349.4ms SsaConstructionTime, 2643.0ms SatisfiabilityAnalysisTime, 289755.2ms InterpolantComputationTime, 554 NumberOfCodeBlocks, 554 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1058 ConstructedInterpolants, 241 QuantifiedInterpolants, 14422 SizeOfPredicates, 173 NumberOfNonLiveVariables, 3180 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 50 InterpolantComputations, 28 PerfectInterpolantSequences, 223/342 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:10:38,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3528dde0-2478-4d8a-98e5-a29e1fd3bf82/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...