./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7 --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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:06:41,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:06:41,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:06:41,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:06:41,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:06:41,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:06:41,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:06:41,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:06:41,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:06:41,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:06:41,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:06:41,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:06:41,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:06:41,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:06:41,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:06:41,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:06:41,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:06:41,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:06:41,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:06:41,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:06:41,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:06:41,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:06:41,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:06:41,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:06:41,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:06:41,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:06:41,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:06:41,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:06:41,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:06:41,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:06:41,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:06:41,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:06:41,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:06:41,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:06:41,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:06:41,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:06:41,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:06:41,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:06:41,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:06:41,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:06:41,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:06:41,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:06:41,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:06:41,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:06:41,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:06:41,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:06:41,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:06:41,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:06:41,930 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:06:41,930 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:06:41,930 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:06:41,931 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:06:41,931 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:06:41,931 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:06:41,931 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:06:41,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:06:41,936 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:06:41,937 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:06:41,937 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:06:41,937 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:06:41,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:06:41,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:06:41,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:06:41,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:06:41,940 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:06:41,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:06:41,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:06:41,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:06:41,944 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:06:41,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:06:41,944 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:06:41,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:06:41,945 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:06:41,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:06:41,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:06:41,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:06:41,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:06:41,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:06:41,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:06:41,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:06:41,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:06:41,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:06:41,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:06:41,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:06:41,949 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_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2021-11-25 20:06:42,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:06:42,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:06:42,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:06:42,325 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:06:42,325 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:06:42,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:06:42,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/67ab7f21b/ad2f3f6ffc334c5495bfedb29473af80/FLAGeac2e65f2 [2021-11-25 20:06:43,095 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:06:43,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:06:43,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/67ab7f21b/ad2f3f6ffc334c5495bfedb29473af80/FLAGeac2e65f2 [2021-11-25 20:06:43,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/67ab7f21b/ad2f3f6ffc334c5495bfedb29473af80 [2021-11-25 20:06:43,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:06:43,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:06:43,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:06:43,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:06:43,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:06:43,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:06:43" (1/1) ... [2021-11-25 20:06:43,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14720b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:43, skipping insertion in model container [2021-11-25 20:06:43,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:06:43" (1/1) ... [2021-11-25 20:06:43,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:06:43,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:06:43,861 WARN L230 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_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:06:43,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:06:43,889 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:06:43,974 WARN L230 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_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:06:43,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:06:44,014 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:06:44,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44 WrapperNode [2021-11-25 20:06:44,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:06:44,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:06:44,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:06:44,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:06:44,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,091 INFO L137 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2021-11-25 20:06:44,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:06:44,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:06:44,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:06:44,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:06:44,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:06:44,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:06:44,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:06:44,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:06:44,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (1/1) ... [2021-11-25 20:06:44,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:06:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:44,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:06:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:06:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:06:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:06:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-25 20:06:44,321 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-25 20:06:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:06:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:06:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:06:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:06:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:06:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:06:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:06:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:06:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:06:44,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:06:44,504 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:06:44,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:06:44,910 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:06:44,994 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:06:44,995 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 20:06:44,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:06:44 BoogieIcfgContainer [2021-11-25 20:06:44,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:06:44,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:06:45,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:06:45,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:06:45,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:06:43" (1/3) ... [2021-11-25 20:06:45,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d783f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:06:45, skipping insertion in model container [2021-11-25 20:06:45,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:06:44" (2/3) ... [2021-11-25 20:06:45,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d783f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:06:45, skipping insertion in model container [2021-11-25 20:06:45,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:06:44" (3/3) ... [2021-11-25 20:06:45,006 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2021-11-25 20:06:45,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:06:45,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-11-25 20:06:45,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:06:45,069 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:06:45,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-11-25 20:06:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:06:45,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:45,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:06:45,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1977358206, now seen corresponding path program 1 times [2021-11-25 20:06:45,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84253777] [2021-11-25 20:06:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:45,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:45,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84253777] [2021-11-25 20:06:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84253777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:45,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:45,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:06:45,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082079301] [2021-11-25 20:06:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:45,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:06:45,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:06:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,360 INFO L87 Difference]: Start difference. First operand has 81 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:45,447 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-11-25 20:06:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:06:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:06:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:45,462 INFO L225 Difference]: With dead ends: 87 [2021-11-25 20:06:45,462 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 20:06:45,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,469 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:45,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:06:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 20:06:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-11-25 20:06:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 38 states have (on average 2.236842105263158) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-25 20:06:45,530 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 6 [2021-11-25 20:06:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:45,531 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-25 20:06:45,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-25 20:06:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:06:45,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:45,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:06:45,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:06:45,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2132845308, now seen corresponding path program 1 times [2021-11-25 20:06:45,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:45,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852027846] [2021-11-25 20:06:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:45,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:45,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852027846] [2021-11-25 20:06:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852027846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:45,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:45,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:06:45,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990624626] [2021-11-25 20:06:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:45,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:06:45,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:06:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,594 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:45,699 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-11-25 20:06:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:06:45,700 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:06:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:45,701 INFO L225 Difference]: With dead ends: 78 [2021-11-25 20:06:45,702 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 20:06:45,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,704 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:45,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 104 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:06:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 20:06:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-25 20:06:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-25 20:06:45,717 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 6 [2021-11-25 20:06:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:45,718 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-25 20:06:45,718 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-25 20:06:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:06:45,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:45,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:06:45,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:06:45,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2132845309, now seen corresponding path program 1 times [2021-11-25 20:06:45,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:45,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800371315] [2021-11-25 20:06:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:45,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:45,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800371315] [2021-11-25 20:06:45,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800371315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:45,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:06:45,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39620519] [2021-11-25 20:06:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:06:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:06:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,846 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:45,942 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-11-25 20:06:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:06:45,942 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:06:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:45,944 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:06:45,968 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 20:06:45,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:06:45,970 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:45,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:06:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 20:06:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-25 20:06:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-25 20:06:45,992 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 6 [2021-11-25 20:06:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:45,992 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-25 20:06:45,993 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-25 20:06:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:06:45,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:45,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:45,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:06:45,996 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash -399588339, now seen corresponding path program 1 times [2021-11-25 20:06:45,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244659028] [2021-11-25 20:06:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:46,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:46,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244659028] [2021-11-25 20:06:46,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244659028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:46,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:46,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:46,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305739378] [2021-11-25 20:06:46,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:46,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:06:46,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:06:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:06:46,171 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:46,371 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-25 20:06:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:46,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-25 20:06:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:46,376 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:06:46,377 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 20:06:46,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:06:46,390 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:46,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 212 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:06:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 20:06:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-25 20:06:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-25 20:06:46,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 10 [2021-11-25 20:06:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:46,407 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-25 20:06:46,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-25 20:06:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:06:46,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:46,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:46,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:06:46,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -399588338, now seen corresponding path program 1 times [2021-11-25 20:06:46,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801916640] [2021-11-25 20:06:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:46,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:46,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:46,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801916640] [2021-11-25 20:06:46,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801916640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:46,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:46,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:06:46,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715475775] [2021-11-25 20:06:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:46,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:06:46,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:06:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:06:46,654 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:46,901 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-11-25 20:06:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-25 20:06:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:46,908 INFO L225 Difference]: With dead ends: 75 [2021-11-25 20:06:46,909 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 20:06:46,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:46,919 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 7 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:46,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:06:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 20:06:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-11-25 20:06:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:06:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-25 20:06:46,947 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 10 [2021-11-25 20:06:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:46,948 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-25 20:06:46,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-25 20:06:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:06:46,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:46,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:46,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:06:46,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:06:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1876340112, now seen corresponding path program 1 times [2021-11-25 20:06:46,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:46,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746674815] [2021-11-25 20:06:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:46,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:06:47,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746674815] [2021-11-25 20:06:47,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746674815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759586088] [2021-11-25 20:06:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:47,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:47,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:47,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:06:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:06:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:47,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:06:47,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759586088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:47,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549141192] [2021-11-25 20:06:47,408 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:06:47,408 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:47,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:47,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:47,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:06:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 20:06:47,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:06:47,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 20:06:47,731 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 19 treesize of output 1 [2021-11-25 20:06:47,739 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 13 treesize of output 9 [2021-11-25 20:06:47,747 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 13 treesize of output 9 [2021-11-25 20:06:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,769 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 25 treesize of output 13 [2021-11-25 20:06:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,780 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 25 treesize of output 13 [2021-11-25 20:06:47,788 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 [2021-11-25 20:06:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:06:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 20:06:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:06:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:48,169 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 [2021-11-25 20:06:48,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:48,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:48,634 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-25 20:06:48,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 224 [2021-11-25 20:06:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:49,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:06:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:49,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:06:49,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:06:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:06:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:49,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:06:49,561 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-25 20:06:49,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 224 [2021-11-25 20:06:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:50,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:06:50,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:06:50,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:50,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:06:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:06:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:06:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:50,298 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 229 treesize of output 209 [2021-11-25 20:06:50,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:50,320 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 0 case distinctions, treesize of input 223 treesize of output 211 [2021-11-25 20:06:50,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:50,344 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 0 case distinctions, treesize of input 233 treesize of output 221 [2021-11-25 20:06:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:50,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:50,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:06:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:50,720 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 [2021-11-25 20:06:51,058 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 7 treesize of output 3 [2021-11-25 20:06:51,084 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 7 treesize of output 3 [2021-11-25 20:06:51,229 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 7 treesize of output 3 [2021-11-25 20:06:51,244 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 7 treesize of output 3 [2021-11-25 20:06:51,506 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:06:51,903 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:07:00,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '998#(and (= |ULTIMATE.start_main_~mid_index~0#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) |ULTIMATE.start_sll_insert_~data#1|) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_main_~mid_index~0#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_sll_insert_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 5 |ULTIMATE.start_sll_insert_#in~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) 0) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:07:00,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:07:00,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:07:00,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-25 20:07:00,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585713570] [2021-11-25 20:07:00,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:00,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:00,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:07:00,127 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 20:07:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:00,191 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-25 20:07:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:07:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2021-11-25 20:07:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:00,193 INFO L225 Difference]: With dead ends: 78 [2021-11-25 20:07:00,193 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 20:07:00,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:07:00,195 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:00,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:07:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 20:07:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-25 20:07:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 2.0) internal successors, (82), 73 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:07:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-11-25 20:07:00,204 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 19 [2021-11-25 20:07:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:00,205 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-11-25 20:07:00,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 20:07:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-11-25 20:07:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:07:00,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:00,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:00,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:00,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1436278219, now seen corresponding path program 2 times [2021-11-25 20:07:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:00,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534202475] [2021-11-25 20:07:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:07:00,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:00,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534202475] [2021-11-25 20:07:00,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534202475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:00,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930779610] [2021-11-25 20:07:00,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:07:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:00,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:00,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:07:00,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:07:00,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 20:07:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:00,984 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 [2021-11-25 20:07:01,005 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 5 treesize of output 3 [2021-11-25 20:07:01,084 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-25 20:07:01,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 20:07:01,193 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 5 treesize of output 3 [2021-11-25 20:07:01,394 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 5 treesize of output 3 [2021-11-25 20:07:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:07:01,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:01,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930779610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:01,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417242995] [2021-11-25 20:07:01,641 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:07:01,641 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:07:01,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:07:01,642 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:07:01,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:07:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:07:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 20:07:01,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 20:07:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:07:01,764 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 19 treesize of output 1 [2021-11-25 20:07:01,770 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 13 treesize of output 9 [2021-11-25 20:07:01,776 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 13 treesize of output 9 [2021-11-25 20:07:01,789 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 [2021-11-25 20:07:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,801 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 25 treesize of output 13 [2021-11-25 20:07:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,809 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 25 treesize of output 13 [2021-11-25 20:07:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:07:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 20:07:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:01,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:07:02,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:02,110 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2021-11-25 20:07:02,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:02,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 209 [2021-11-25 20:07:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:02,153 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 109 [2021-11-25 20:07:02,384 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-25 20:07:02,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 230 [2021-11-25 20:07:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:07:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:02,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:07:02,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:07:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:07:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:07:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:07:02,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:07:02,898 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-25 20:07:02,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 230 [2021-11-25 20:07:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:07:03,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:07:03,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:07:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:07:03,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:07:03,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:07:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:03,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2021-11-25 20:07:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:03,397 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 232 treesize of output 212 [2021-11-25 20:07:03,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:03,409 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 0 case distinctions, treesize of input 226 treesize of output 214 [2021-11-25 20:07:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:03,420 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 0 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:07:03,597 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 13 treesize of output 9 [2021-11-25 20:07:03,609 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 13 treesize of output 9 [2021-11-25 20:07:03,620 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 19 treesize of output 1 [2021-11-25 20:07:04,001 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 7 treesize of output 3 [2021-11-25 20:07:04,016 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 7 treesize of output 3 [2021-11-25 20:07:04,187 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 7 treesize of output 3 [2021-11-25 20:07:04,232 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 7 treesize of output 3 [2021-11-25 20:07:04,465 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:07:04,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:07:12,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1274#(and (= |ULTIMATE.start_main_~mid_index~0#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_main_~mid_index~0#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_sll_insert_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= 5 |ULTIMATE.start_sll_insert_#in~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:07:12,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:07:12,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:07:12,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-11-25 20:07:12,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776347371] [2021-11-25 20:07:12,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:12,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:07:12,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:07:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-25 20:07:12,299 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:07:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:12,778 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-11-25 20:07:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:07:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2021-11-25 20:07:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:12,780 INFO L225 Difference]: With dead ends: 84 [2021-11-25 20:07:12,780 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 20:07:12,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 20:07:12,782 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 327 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:12,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 241 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:07:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 20:07:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-11-25 20:07:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 69 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:07:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-25 20:07:12,791 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 28 [2021-11-25 20:07:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:12,792 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-25 20:07:12,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:07:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-25 20:07:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:07:12,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:12,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:12,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:13,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1436278218, now seen corresponding path program 1 times [2021-11-25 20:07:13,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:13,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068306615] [2021-11-25 20:07:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:13,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:07:13,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068306615] [2021-11-25 20:07:13,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068306615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:13,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171691333] [2021-11-25 20:07:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:13,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:13,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:13,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:13,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:07:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:13,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:07:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:13,525 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 [2021-11-25 20:07:13,557 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 5 treesize of output 3 [2021-11-25 20:07:13,718 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 201443 column 46: unknown constant v_#length_BEFORE_CALL_46 [2021-11-25 20:07:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556326772] [2021-11-25 20:07:13,721 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:07:13,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:07:13,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:07:13,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:07:13,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:07:13,763 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@22ecf0e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:401) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) 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:610) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-25 20:07:13,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:07:13,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-25 20:07:13,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266624389] [2021-11-25 20:07:13,768 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:13,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:07:13,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:07:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:07:13,770 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 12 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:07:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:07:13,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:07:13,777 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:13,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:07:13,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:14,000 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@22ecf0e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-25 20:07:14,020 INFO L158 Benchmark]: Toolchain (without parser) took 30654.09ms. Allocated memory was 102.8MB in the beginning and 237.0MB in the end (delta: 134.2MB). Free memory was 69.2MB in the beginning and 165.8MB in the end (delta: -96.6MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,020 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:07:14,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 647.18ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 68.0MB in the end (delta: 888.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.41ms. Allocated memory is still 102.8MB. Free memory was 68.0MB in the beginning and 65.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,021 INFO L158 Benchmark]: Boogie Preprocessor took 87.46ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 64.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,022 INFO L158 Benchmark]: RCFGBuilder took 816.56ms. Allocated memory was 102.8MB in the beginning and 136.3MB in the end (delta: 33.6MB). Free memory was 63.9MB in the beginning and 107.5MB in the end (delta: -43.7MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,022 INFO L158 Benchmark]: TraceAbstraction took 29003.47ms. Allocated memory was 136.3MB in the beginning and 237.0MB in the end (delta: 100.7MB). Free memory was 106.9MB in the beginning and 165.8MB in the end (delta: -58.9MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-25 20:07:14,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 647.18ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 68.0MB in the end (delta: 888.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.41ms. Allocated memory is still 102.8MB. Free memory was 68.0MB in the beginning and 65.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 87.46ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 64.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 816.56ms. Allocated memory was 102.8MB in the beginning and 136.3MB in the end (delta: 33.6MB). Free memory was 63.9MB in the beginning and 107.5MB in the end (delta: -43.7MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. * TraceAbstraction took 29003.47ms. Allocated memory was 136.3MB in the beginning and 237.0MB in the end (delta: 100.7MB). Free memory was 106.9MB in the beginning and 165.8MB in the end (delta: -58.9MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@22ecf0e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@22ecf0e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-25 20:07:14,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7 --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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:07:16,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:07:16,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:07:16,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:07:16,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:07:16,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:07:16,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:07:16,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:07:16,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:07:16,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:07:16,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:07:16,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:07:16,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:07:16,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:07:16,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:07:16,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:07:16,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:07:16,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:07:16,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:07:16,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:07:16,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:07:16,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:07:16,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:07:16,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:07:16,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:07:16,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:07:16,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:07:16,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:07:16,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:07:16,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:07:16,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:07:16,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:07:16,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:07:16,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:07:16,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:07:16,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:07:16,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:07:16,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:07:16,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:07:16,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:07:16,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:07:16,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 20:07:16,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:07:16,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:07:16,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:07:16,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:07:16,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:07:16,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:07:16,896 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:07:16,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:07:16,896 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:07:16,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:07:16,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:07:16,898 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:07:16,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:07:16,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:07:16,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:07:16,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:07:16,901 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:07:16,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:07:16,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:07:16,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:07:16,902 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:07:16,902 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:07:16,902 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:07:16,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:07:16,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:07:16,903 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:07:16,903 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:07:16,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:07:16,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:07:16,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:07:16,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:07:16,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:07:16,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:16,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:07:16,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:07:16,906 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:07:16,906 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:07:16,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:07:16,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:07:16,907 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_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2021-11-25 20:07:17,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:07:17,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:07:17,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:07:17,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:07:17,336 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:07:17,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:07:17,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/41dbab1b3/3c1bd4a363a34c65aa49db4371311b26/FLAGc4404b05f [2021-11-25 20:07:18,053 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:07:18,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:07:18,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/41dbab1b3/3c1bd4a363a34c65aa49db4371311b26/FLAGc4404b05f [2021-11-25 20:07:18,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/data/41dbab1b3/3c1bd4a363a34c65aa49db4371311b26 [2021-11-25 20:07:18,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:07:18,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:07:18,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:18,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:07:18,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:07:18,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:18,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66616251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18, skipping insertion in model container [2021-11-25 20:07:18,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:18,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:07:18,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:07:18,851 WARN L230 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_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:07:18,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:18,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:07:18,921 WARN L230 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_f6dac8c5-5236-47a3-8069-57bd349cac04/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:07:18,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:18,976 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:07:18,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18 WrapperNode [2021-11-25 20:07:18,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:18,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:18,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:07:18,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:07:18,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,062 INFO L137 Inliner]: procedures = 131, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2021-11-25 20:07:19,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:19,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:07:19,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:07:19,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:07:19,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:07:19,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:07:19,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:07:19,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:07:19,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (1/1) ... [2021-11-25 20:07:19,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:19,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:07:19,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:07:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 20:07:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-25 20:07:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-25 20:07:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:07:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:07:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:07:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:07:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:07:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:07:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 20:07:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:07:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:07:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:07:19,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:07:19,539 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:07:19,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:07:20,223 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:07:20,232 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:07:20,232 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 20:07:20,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:20 BoogieIcfgContainer [2021-11-25 20:07:20,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:07:20,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:07:20,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:07:20,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:07:20,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:07:18" (1/3) ... [2021-11-25 20:07:20,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bfe0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:20, skipping insertion in model container [2021-11-25 20:07:20,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:18" (2/3) ... [2021-11-25 20:07:20,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bfe0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:20, skipping insertion in model container [2021-11-25 20:07:20,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:20" (3/3) ... [2021-11-25 20:07:20,246 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2021-11-25 20:07:20,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:07:20,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-11-25 20:07:20,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:07:20,319 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:07:20,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-11-25 20:07:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:07:20,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:20,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:20,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2021-11-25 20:07:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641767120] [2021-11-25 20:07:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:20,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:20,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:20,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:07:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:07:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:20,611 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 [2021-11-25 20:07:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:20,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:20,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641767120] [2021-11-25 20:07:20,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641767120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:20,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:20,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:07:20,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866754939] [2021-11-25 20:07:20,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:20,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:07:20,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:07:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:20,683 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:20,950 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-11-25 20:07:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:07:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:07:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:20,963 INFO L225 Difference]: With dead ends: 97 [2021-11-25 20:07:20,964 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 20:07:20,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:20,970 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:20,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:07:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 20:07:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-25 20:07:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-11-25 20:07:21,035 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2021-11-25 20:07:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:21,036 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-11-25 20:07:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-11-25 20:07:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:07:21,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:21,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:21,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:21,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:07:21,251 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2021-11-25 20:07:21,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:21,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624062473] [2021-11-25 20:07:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:21,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:21,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:21,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:21,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:07:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:21,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:07:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:21,426 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 [2021-11-25 20:07:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:21,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:21,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624062473] [2021-11-25 20:07:21,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624062473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:21,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:21,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:07:21,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475775200] [2021-11-25 20:07:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:21,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:07:21,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:21,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:07:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:21,472 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:21,723 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-11-25 20:07:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:07:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:07:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:21,729 INFO L225 Difference]: With dead ends: 92 [2021-11-25 20:07:21,729 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 20:07:21,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:21,731 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:21,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:07:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 20:07:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-25 20:07:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-25 20:07:21,757 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2021-11-25 20:07:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:21,758 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-25 20:07:21,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-25 20:07:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:07:21,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:21,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:21,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:21,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:07:21,981 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2021-11-25 20:07:21,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:21,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730783812] [2021-11-25 20:07:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:21,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:21,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:21,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:21,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:07:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:07:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:22,130 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 [2021-11-25 20:07:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:22,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:22,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730783812] [2021-11-25 20:07:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730783812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:22,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:22,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:22,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522873651] [2021-11-25 20:07:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:22,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:07:22,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:07:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:07:22,223 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:22,762 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-11-25 20:07:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 20:07:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:22,766 INFO L225 Difference]: With dead ends: 96 [2021-11-25 20:07:22,766 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 20:07:22,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:22,769 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:22,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 329 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:07:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 20:07:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-11-25 20:07:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-25 20:07:22,782 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2021-11-25 20:07:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:22,783 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-25 20:07:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-25 20:07:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:07:22,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:22,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:22,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 20:07:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:07:23,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2021-11-25 20:07:23,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:23,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121204060] [2021-11-25 20:07:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:23,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:23,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:23,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:23,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:07:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:07:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:23,145 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 [2021-11-25 20:07:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:23,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:23,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121204060] [2021-11-25 20:07:23,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121204060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:23,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:23,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:23,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434500177] [2021-11-25 20:07:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:23,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:07:23,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:23,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:07:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:07:23,332 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:23,926 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-11-25 20:07:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:23,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 20:07:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:23,929 INFO L225 Difference]: With dead ends: 95 [2021-11-25 20:07:23,930 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 20:07:23,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:23,931 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:23,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 345 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:07:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 20:07:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-11-25 20:07:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-11-25 20:07:23,941 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2021-11-25 20:07:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:23,942 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-11-25 20:07:23,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-11-25 20:07:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:07:23,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:23,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:23,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:07:24,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2021-11-25 20:07:24,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285475748] [2021-11-25 20:07:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:24,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:24,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:24,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:07:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:07:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:24,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:24,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285475748] [2021-11-25 20:07:24,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285475748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:24,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:24,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:07:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581472104] [2021-11-25 20:07:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:24,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:07:24,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:07:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:24,300 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:24,312 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-11-25 20:07:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:07:24,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 20:07:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:24,315 INFO L225 Difference]: With dead ends: 96 [2021-11-25 20:07:24,315 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 20:07:24,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:24,318 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:24,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 193 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:07:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 20:07:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-11-25 20:07:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:07:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-25 20:07:24,348 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2021-11-25 20:07:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:24,349 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-25 20:07:24,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:07:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-25 20:07:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:07:24,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:24,351 INFO L514 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] [2021-11-25 20:07:24,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:07:24,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2021-11-25 20:07:24,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562595643] [2021-11-25 20:07:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:24,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:24,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:24,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:07:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:07:24,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:24,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:07:24,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562595643] [2021-11-25 20:07:24,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562595643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633557973] [2021-11-25 20:07:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:24,963 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:07:24,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:07:24,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:07:24,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-25 20:07:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:25,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:07:25,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:25,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:07:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633557973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:25,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075276870] [2021-11-25 20:07:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:25,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:25,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:25,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:07:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:07:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:25,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:07:25,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075276870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:25,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:07:25,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-25 20:07:25,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532663934] [2021-11-25 20:07:25,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:07:25,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:07:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:25,775 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 20:07:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:25,870 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-11-25 20:07:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:07:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-11-25 20:07:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:25,871 INFO L225 Difference]: With dead ends: 109 [2021-11-25 20:07:25,872 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 20:07:25,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:25,873 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 105 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:25,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 398 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:07:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 20:07:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-25 20:07:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.6) internal successors, (112), 102 states have internal predecessors, (112), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:07:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-11-25 20:07:25,883 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 28 [2021-11-25 20:07:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-11-25 20:07:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 20:07:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-11-25 20:07:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:07:25,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:25,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:25,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:26,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:26,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:07:26,502 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2021-11-25 20:07:26,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605748679] [2021-11-25 20:07:26,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:07:26,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:26,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:26,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:07:26,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:07:26,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:07:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:26,747 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 [2021-11-25 20:07:26,786 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 12 treesize of output 10 [2021-11-25 20:07:26,997 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:07:26,997 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 32 [2021-11-25 20:07:27,094 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 9 treesize of output 7 [2021-11-25 20:07:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:27,265 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 19 treesize of output 21 [2021-11-25 20:07:27,461 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 13 treesize of output 11 [2021-11-25 20:07:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:29,878 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 19 treesize of output 21 [2021-11-25 20:07:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 6 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:07:30,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:30,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605748679] [2021-11-25 20:07:30,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605748679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288328395] [2021-11-25 20:07:30,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:07:30,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:07:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:07:30,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:07:30,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 20:07:30,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:07:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118225279] [2021-11-25 20:07:30,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:07:30,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:30,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:30,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-25 20:07:30,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:07:30,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:07:30,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:07:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:30,869 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 [2021-11-25 20:07:33,114 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:07:33,115 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 [2021-11-25 20:07:37,408 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:07:37,409 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 [2021-11-25 20:07:39,712 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:07:39,713 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 15 treesize of output 20 [2021-11-25 20:07:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:07:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:07:41,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118225279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:41,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:07:41,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 18 [2021-11-25 20:07:41,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178661512] [2021-11-25 20:07:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:41,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 20:07:41,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:07:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 20:07:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=305, Unknown=4, NotChecked=0, Total=380 [2021-11-25 20:07:41,118 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:07:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:50,347 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2021-11-25 20:07:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:07:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-11-25 20:07:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:50,350 INFO L225 Difference]: With dead ends: 126 [2021-11-25 20:07:50,350 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 20:07:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=120, Invalid=476, Unknown=4, NotChecked=0, Total=600 [2021-11-25 20:07:50,352 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 57 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 601 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2021-11-25 20:07:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 20:07:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2021-11-25 20:07:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.5263157894736843) internal successors, (116), 106 states have internal predecessors, (116), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:07:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-25 20:07:50,378 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 41 [2021-11-25 20:07:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:50,379 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-25 20:07:50,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:07:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-25 20:07:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:07:50,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:50,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:50,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:50,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:50,797 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:07:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -888530815, now seen corresponding path program 1 times [2021-11-25 20:07:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:07:50,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283433360] [2021-11-25 20:07:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:50,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:07:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:07:50,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:07:50,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:07:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:07:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:51,140 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 [2021-11-25 20:07:51,150 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 [2021-11-25 20:07:51,254 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 5 treesize of output 3 [2021-11-25 20:07:51,261 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 9 treesize of output 7 [2021-11-25 20:07:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:53,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:07:53,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:07:53,540 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 15 treesize of output 15 [2021-11-25 20:07:53,674 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 5 treesize of output 3 [2021-11-25 20:07:55,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:55,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:07:56,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:07:56,322 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 12 treesize of output 18 [2021-11-25 20:07:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:56,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:56,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:07:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283433360] [2021-11-25 20:07:56,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283433360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595660109] [2021-11-25 20:07:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:56,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:07:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:07:56,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:07:56,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-25 20:07:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:07:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:57,385 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 [2021-11-25 20:07:57,418 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 5 treesize of output 3 [2021-11-25 20:07:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:57,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:07:57,838 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 5 treesize of output 3 [2021-11-25 20:08:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:00,769 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 5 treesize of output 3 [2021-11-25 20:08:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:00,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:08:01,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595660109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17257417] [2021-11-25 20:08:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:03,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:03,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:03,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:08:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 20:08:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:03,513 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 [2021-11-25 20:08:03,524 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 [2021-11-25 20:08:04,031 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:08:04,031 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 12 treesize of output 18 [2021-11-25 20:08:04,065 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:08:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 20:08:04,823 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 20:08:04,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 35 treesize of output 52 [2021-11-25 20:08:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-25 20:08:09,792 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 20:08:09,793 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 29 treesize of output 31 [2021-11-25 20:08:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:08:09,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:10,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17257417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:10,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:08:10,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 30 [2021-11-25 20:08:10,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475538536] [2021-11-25 20:08:10,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:10,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 20:08:10,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 20:08:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1072, Unknown=5, NotChecked=0, Total=1190 [2021-11-25 20:08:10,461 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 31 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 23 states have internal predecessors, (85), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 20:08:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:14,691 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2021-11-25 20:08:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:08:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 23 states have internal predecessors, (85), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 41 [2021-11-25 20:08:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:14,694 INFO L225 Difference]: With dead ends: 113 [2021-11-25 20:08:14,694 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 20:08:14,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=205, Invalid=1770, Unknown=5, NotChecked=0, Total=1980 [2021-11-25 20:08:14,697 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 11 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:14,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1077 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 451 Unchecked, 0.8s Time] [2021-11-25 20:08:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 20:08:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-25 20:08:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.513157894736842) internal successors, (115), 105 states have internal predecessors, (115), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-11-25 20:08:14,705 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 41 [2021-11-25 20:08:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:14,706 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-11-25 20:08:14,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 23 states have internal predecessors, (85), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 20:08:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-11-25 20:08:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:08:14,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:14,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:14,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:14,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:15,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:15,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:15,313 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -338093919, now seen corresponding path program 1 times [2021-11-25 20:08:15,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004386725] [2021-11-25 20:08:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:15,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:15,316 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:15,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:08:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:08:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:15,753 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 [2021-11-25 20:08:16,167 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 17 treesize of output 13 [2021-11-25 20:08:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:16,607 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 26 treesize of output 28 [2021-11-25 20:08:16,658 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 20:08:16,658 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 31 treesize of output 42 [2021-11-25 20:08:16,849 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 16 [2021-11-25 20:08:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:17,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:17,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004386725] [2021-11-25 20:08:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004386725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627571716] [2021-11-25 20:08:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:17,347 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:08:17,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:08:17,359 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:08:17,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-25 20:08:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 20:08:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:18,030 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 [2021-11-25 20:08:18,647 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 18 treesize of output 14 [2021-11-25 20:08:19,097 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 20:08:19,098 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 30 treesize of output 41 [2021-11-25 20:08:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:19,126 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 27 [2021-11-25 20:08:19,337 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 18 [2021-11-25 20:08:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:19,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:19,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1627571716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652960334] [2021-11-25 20:08:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:19,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:19,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:19,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:19,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:08:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:08:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:20,150 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 [2021-11-25 20:08:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 20:08:21,035 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 20:08:21,035 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 30 treesize of output 41 [2021-11-25 20:08:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:21,050 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 27 [2021-11-25 20:08:21,212 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 16 [2021-11-25 20:08:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:21,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:21,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652960334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:21,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:08:21,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2021-11-25 20:08:21,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845197211] [2021-11-25 20:08:21,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:08:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:08:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1378, Unknown=3, NotChecked=0, Total=1560 [2021-11-25 20:08:21,480 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:23,659 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2021-11-25 20:08:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:08:23,660 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2021-11-25 20:08:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:23,662 INFO L225 Difference]: With dead ends: 174 [2021-11-25 20:08:23,662 INFO L226 Difference]: Without dead ends: 174 [2021-11-25 20:08:23,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 96 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=312, Invalid=2230, Unknown=8, NotChecked=0, Total=2550 [2021-11-25 20:08:23,665 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:23,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 667 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 528 Invalid, 0 Unknown, 104 Unchecked, 1.3s Time] [2021-11-25 20:08:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-25 20:08:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 115. [2021-11-25 20:08:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 107 states have internal predecessors, (119), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-11-25 20:08:23,673 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 44 [2021-11-25 20:08:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:23,674 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-11-25 20:08:23,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-11-25 20:08:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:08:23,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:23,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:23,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:24,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:24,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:24,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -338093918, now seen corresponding path program 1 times [2021-11-25 20:08:24,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:24,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690163768] [2021-11-25 20:08:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:24,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:24,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:24,284 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:24,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 20:08:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:08:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:24,749 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 [2021-11-25 20:08:25,126 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 9 treesize of output 5 [2021-11-25 20:08:25,132 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 7 treesize of output 3 [2021-11-25 20:08:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:08:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:25,566 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 14 treesize of output 16 [2021-11-25 20:08:25,595 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:08:25,595 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 18 [2021-11-25 20:08:25,807 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 17 treesize of output 9 [2021-11-25 20:08:25,816 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 [2021-11-25 20:08:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:26,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:27,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690163768] [2021-11-25 20:08:27,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690163768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [432025027] [2021-11-25 20:08:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:27,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:08:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:08:27,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:08:27,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 20:08:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 20:08:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:08:27,826 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 [2021-11-25 20:08:28,668 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 [2021-11-25 20:08:28,685 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 7 treesize of output 3 [2021-11-25 20:08:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:29,622 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 33 treesize of output 33 [2021-11-25 20:08:29,645 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:08:29,645 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 23 treesize of output 23 [2021-11-25 20:08:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:29,667 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 14 treesize of output 16 [2021-11-25 20:08:29,678 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 [2021-11-25 20:08:29,993 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 [2021-11-25 20:08:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 20:08:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:30,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:31,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [432025027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235227063] [2021-11-25 20:08:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:31,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:31,367 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:31,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 20:08:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 20:08:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:31,575 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 [2021-11-25 20:08:32,029 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:08:32,030 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 19 treesize of output 24 [2021-11-25 20:08:32,207 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 [2021-11-25 20:08:32,624 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:08:32,625 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 24 treesize of output 31 [2021-11-25 20:08:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:34,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-11-25 20:08:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:34,564 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 14 treesize of output 16 [2021-11-25 20:08:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:34,572 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 42 treesize of output 40 [2021-11-25 20:08:34,600 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 20:08:34,600 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 35 treesize of output 37 [2021-11-25 20:08:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 20:08:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:08:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:08:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:36,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235227063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:36,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:08:36,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 49 [2021-11-25 20:08:36,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31107289] [2021-11-25 20:08:36,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:36,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 20:08:36,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 20:08:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2821, Unknown=52, NotChecked=0, Total=3080 [2021-11-25 20:08:36,857 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 50 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 43 states have internal predecessors, (107), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:39,410 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-25 20:08:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:08:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 43 states have internal predecessors, (107), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2021-11-25 20:08:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:39,413 INFO L225 Difference]: With dead ends: 132 [2021-11-25 20:08:39,413 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 20:08:39,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=343, Invalid=4143, Unknown=70, NotChecked=0, Total=4556 [2021-11-25 20:08:39,416 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 32 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:39,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1592 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 423 Invalid, 0 Unknown, 479 Unchecked, 0.8s Time] [2021-11-25 20:08:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 20:08:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2021-11-25 20:08:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 107 states have internal predecessors, (118), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-11-25 20:08:39,432 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 44 [2021-11-25 20:08:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:39,433 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-11-25 20:08:39,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 43 states have internal predecessors, (107), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-11-25 20:08:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:08:39,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:39,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:39,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:39,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:39,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-25 20:08:40,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:40,042 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1890978520, now seen corresponding path program 1 times [2021-11-25 20:08:40,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:40,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631786238] [2021-11-25 20:08:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:40,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:40,044 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:40,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 20:08:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:08:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:40,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:40,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631786238] [2021-11-25 20:08:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631786238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:40,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:40,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:40,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604643125] [2021-11-25 20:08:40,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:40,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:40,337 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:40,386 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-11-25 20:08:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:08:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-25 20:08:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:40,390 INFO L225 Difference]: With dead ends: 116 [2021-11-25 20:08:40,390 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 20:08:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:40,391 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 81 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:40,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 186 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:08:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 20:08:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-25 20:08:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.5) internal successors, (117), 107 states have internal predecessors, (117), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-11-25 20:08:40,396 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 45 [2021-11-25 20:08:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:40,396 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-11-25 20:08:40,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-11-25 20:08:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 20:08:40,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:40,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:40,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:40,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:40,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash -457619027, now seen corresponding path program 1 times [2021-11-25 20:08:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441950067] [2021-11-25 20:08:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:40,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:40,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:40,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 20:08:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:08:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:40,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:41,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:41,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441950067] [2021-11-25 20:08:41,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441950067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:41,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59666537] [2021-11-25 20:08:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:41,773 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:08:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:08:41,774 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:08:41,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 20:08:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:08:42,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:42,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [59666537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129890656] [2021-11-25 20:08:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:42,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:42,646 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:42,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 20:08:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:08:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:42,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:43,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129890656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:43,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:08:43,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 20:08:43,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444027673] [2021-11-25 20:08:43,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:43,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:08:43,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:08:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:08:43,483 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:08:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:43,554 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2021-11-25 20:08:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:43,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-11-25 20:08:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:43,556 INFO L225 Difference]: With dead ends: 112 [2021-11-25 20:08:43,556 INFO L226 Difference]: Without dead ends: 112 [2021-11-25 20:08:43,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:08:43,557 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 216 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:43,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 242 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:08:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-25 20:08:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-25 20:08:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.4675324675324675) internal successors, (113), 104 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-11-25 20:08:43,564 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 47 [2021-11-25 20:08:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-11-25 20:08:43,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:08:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-11-25 20:08:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:08:43,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:43,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:43,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:43,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-25 20:08:43,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-25 20:08:44,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:44,172 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289572, now seen corresponding path program 1 times [2021-11-25 20:08:44,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:44,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789703002] [2021-11-25 20:08:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:44,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:44,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:44,174 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 20:08:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:08:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:44,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:44,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789703002] [2021-11-25 20:08:44,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789703002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:44,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:44,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:44,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088173752] [2021-11-25 20:08:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:44,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:44,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:44,433 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:44,666 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2021-11-25 20:08:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-25 20:08:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:44,673 INFO L225 Difference]: With dead ends: 123 [2021-11-25 20:08:44,673 INFO L226 Difference]: Without dead ends: 123 [2021-11-25 20:08:44,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:44,674 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:44,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 145 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-25 20:08:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2021-11-25 20:08:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.4545454545454546) internal successors, (112), 103 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-11-25 20:08:44,681 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 48 [2021-11-25 20:08:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:44,681 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-11-25 20:08:44,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-11-25 20:08:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:08:44,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:44,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:44,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:44,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:44,892 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289571, now seen corresponding path program 1 times [2021-11-25 20:08:44,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:44,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256462447] [2021-11-25 20:08:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:44,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:44,894 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:44,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 20:08:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:08:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:08:45,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:45,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:45,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256462447] [2021-11-25 20:08:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256462447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:45,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:45,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:45,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721903866] [2021-11-25 20:08:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:45,287 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:45,649 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-11-25 20:08:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-25 20:08:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:45,652 INFO L225 Difference]: With dead ends: 110 [2021-11-25 20:08:45,652 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 20:08:45,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:45,653 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:45,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 141 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:08:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 20:08:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-25 20:08:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 102 states have internal predecessors, (111), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-11-25 20:08:45,660 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 48 [2021-11-25 20:08:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:45,660 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-11-25 20:08:45,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-11-25 20:08:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:08:45,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:45,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:45,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:45,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:45,868 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289412, now seen corresponding path program 1 times [2021-11-25 20:08:45,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:45,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287826732] [2021-11-25 20:08:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:45,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:45,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:45,870 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:45,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 20:08:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:46,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:08:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:08:46,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:46,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287826732] [2021-11-25 20:08:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287826732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:46,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:46,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:08:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250947347] [2021-11-25 20:08:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:46,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:08:46,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:08:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:46,185 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:46,343 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-11-25 20:08:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:08:46,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-25 20:08:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:46,344 INFO L225 Difference]: With dead ends: 121 [2021-11-25 20:08:46,344 INFO L226 Difference]: Without dead ends: 121 [2021-11-25 20:08:46,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:46,345 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:46,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-25 20:08:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2021-11-25 20:08:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 101 states have internal predecessors, (110), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-11-25 20:08:46,364 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 48 [2021-11-25 20:08:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:46,365 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-11-25 20:08:46,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-11-25 20:08:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:08:46,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:46,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:46,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:46,566 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289411, now seen corresponding path program 1 times [2021-11-25 20:08:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890513373] [2021-11-25 20:08:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:46,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:46,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:46,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 20:08:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:08:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:08:47,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:47,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890513373] [2021-11-25 20:08:47,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890513373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:47,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:47,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:47,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710914178] [2021-11-25 20:08:47,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:47,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:08:47,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:08:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:47,050 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:47,283 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-25 20:08:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:08:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-11-25 20:08:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:47,285 INFO L225 Difference]: With dead ends: 108 [2021-11-25 20:08:47,285 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 20:08:47,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:47,287 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:47,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 20:08:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-25 20:08:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 100 states have internal predecessors, (109), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2021-11-25 20:08:47,293 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 48 [2021-11-25 20:08:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:47,294 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2021-11-25 20:08:47,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2021-11-25 20:08:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:08:47,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:47,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:47,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-25 20:08:47,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:47,510 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271039, now seen corresponding path program 1 times [2021-11-25 20:08:47,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:47,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580219986] [2021-11-25 20:08:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:47,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:47,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:47,512 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:47,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 20:08:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:08:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:47,854 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 [2021-11-25 20:08:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:08:47,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:47,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580219986] [2021-11-25 20:08:47,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580219986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:47,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:47,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:08:47,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733561636] [2021-11-25 20:08:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:47,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:08:47,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:08:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:08:47,934 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:48,348 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-11-25 20:08:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:08:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-25 20:08:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:48,350 INFO L225 Difference]: With dead ends: 119 [2021-11-25 20:08:48,350 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 20:08:48,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:48,351 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 59 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 225 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:08:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 20:08:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2021-11-25 20:08:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 99 states have internal predecessors, (108), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-11-25 20:08:48,358 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 49 [2021-11-25 20:08:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:48,358 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-11-25 20:08:48,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-11-25 20:08:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:08:48,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:48,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:48,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:48,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:48,568 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271038, now seen corresponding path program 1 times [2021-11-25 20:08:48,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:48,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798197699] [2021-11-25 20:08:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:48,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:48,570 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:48,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 20:08:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:08:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:48,870 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 [2021-11-25 20:08:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:08:49,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:49,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798197699] [2021-11-25 20:08:49,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798197699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:49,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:49,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:08:49,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917057886] [2021-11-25 20:08:49,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:08:49,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:08:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:08:49,052 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:49,501 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2021-11-25 20:08:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:08:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-25 20:08:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:49,503 INFO L225 Difference]: With dead ends: 106 [2021-11-25 20:08:49,503 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 20:08:49,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:49,504 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 61 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:49,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 228 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:08:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 20:08:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-25 20:08:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 98 states have internal predecessors, (107), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-11-25 20:08:49,511 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 49 [2021-11-25 20:08:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:49,511 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-11-25 20:08:49,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:08:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-11-25 20:08:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:08:49,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:49,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2021-11-25 20:08:49,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:49,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:49,727 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash -342796830, now seen corresponding path program 1 times [2021-11-25 20:08:49,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:49,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281333511] [2021-11-25 20:08:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:49,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:49,729 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:49,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 20:08:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:08:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:08:50,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:50,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281333511] [2021-11-25 20:08:50,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281333511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:50,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:50,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:50,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762864953] [2021-11-25 20:08:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:50,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:08:50,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:08:50,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:08:50,129 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:50,367 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2021-11-25 20:08:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:08:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-25 20:08:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:50,369 INFO L225 Difference]: With dead ends: 117 [2021-11-25 20:08:50,370 INFO L226 Difference]: Without dead ends: 117 [2021-11-25 20:08:50,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:50,371 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:50,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 100 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-25 20:08:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2021-11-25 20:08:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 97 states have internal predecessors, (106), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-25 20:08:50,376 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 51 [2021-11-25 20:08:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:50,377 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-25 20:08:50,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-25 20:08:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:08:50,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:50,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2021-11-25 20:08:50,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:50,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:50,593 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash -342796829, now seen corresponding path program 1 times [2021-11-25 20:08:50,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:50,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138861486] [2021-11-25 20:08:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:50,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:50,595 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:50,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-25 20:08:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:08:50,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:08:51,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:51,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138861486] [2021-11-25 20:08:51,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138861486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:51,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:51,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:08:51,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336379171] [2021-11-25 20:08:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:51,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:08:51,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:08:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:08:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:08:51,182 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:51,429 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-25 20:08:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:08:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-25 20:08:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:51,431 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:08:51,432 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 20:08:51,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:08:51,433 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:51,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:08:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 20:08:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-25 20:08:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 95 states have internal predecessors, (104), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:08:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-11-25 20:08:51,438 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 51 [2021-11-25 20:08:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:51,438 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-11-25 20:08:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:08:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-11-25 20:08:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:08:51,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:51,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2021-11-25 20:08:51,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:08:51,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-11-25 20:08:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1171904341, now seen corresponding path program 1 times [2021-11-25 20:08:51,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:08:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610219941] [2021-11-25 20:08:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:51,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:08:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:08:51,662 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:08:51,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-25 20:08:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 20:08:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:52,606 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 [2021-11-25 20:08:52,815 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_79 (_ BitVec 32))) (and (bvult v_arrayElimCell_79 |c_#StackHeapBarrier|) (not (= v_arrayElimCell_79 (_ bv0 32))))) (exists ((v_ArrVal_1744 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1744) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2021-11-25 20:08:52,842 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_79 (_ BitVec 32))) (and (bvult v_arrayElimCell_79 |c_#StackHeapBarrier|) (not (= v_arrayElimCell_79 (_ bv0 32))))) (exists ((v_ArrVal_1745 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1745) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2021-11-25 20:08:52,871 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_79 (_ BitVec 32))) (and (bvult v_arrayElimCell_79 |c_#StackHeapBarrier|) (not (= v_arrayElimCell_79 (_ bv0 32))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1745 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1745) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 20:08:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:52,925 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 22 [2021-11-25 20:08:54,318 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:08:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-25 20:08:54,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:54,511 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 22 [2021-11-25 20:08:55,140 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 23 treesize of output 11 [2021-11-25 20:08:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2021-11-25 20:08:55,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:55,703 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:55,716 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1746) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:55,774 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_1746) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:55,787 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_#t~mem8#1.base| v_ArrVal_1746) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:55,802 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) v_ArrVal_1746) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:55,817 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~mid_index~0#1| (_ bv0 32))) (forall ((v_ArrVal_1746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1747 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) v_ArrVal_1746) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_1747) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))))) is different from false [2021-11-25 20:08:56,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:08:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610219941] [2021-11-25 20:08:56,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610219941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517243194] [2021-11-25 20:08:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:56,067 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:08:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:08:56,068 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:08:56,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-25 20:08:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:08:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:08:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:57,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:08:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-11-25 20:08:59,337 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:08:59,338 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 21 treesize of output 21 [2021-11-25 20:08:59,788 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 20:08:59,789 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2021-11-25 20:09:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:00,172 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:09:00,172 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-11-25 20:09:00,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-25 20:09:00,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203486226] [2021-11-25 20:09:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:00,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:00,190 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:00,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 20:09:00,332 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@450b5621 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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:610) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-25 20:09:00,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:00,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-25 20:09:00,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828228023] [2021-11-25 20:09:00,335 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:00,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:09:00,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:09:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:09:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1431, Unknown=11, NotChecked=756, Total=2352 [2021-11-25 20:09:00,337 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:09:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:09:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=154, Invalid=1431, Unknown=11, NotChecked=756, Total=2352 [2021-11-25 20:09:00,339 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:00,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:00,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:00,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:00,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:00,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:00,941 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@450b5621 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-25 20:09:00,943 INFO L158 Benchmark]: Toolchain (without parser) took 102681.87ms. Allocated memory was 69.2MB in the beginning and 123.7MB in the end (delta: 54.5MB). Free memory was 50.2MB in the beginning and 69.1MB in the end (delta: -18.9MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,943 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 69.2MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:09:00,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 710.78ms. Allocated memory is still 69.2MB. Free memory was 50.1MB in the beginning and 43.9MB in the end (delta: 6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.92ms. Allocated memory is still 69.2MB. Free memory was 43.6MB in the beginning and 41.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,944 INFO L158 Benchmark]: Boogie Preprocessor took 94.44ms. Allocated memory is still 69.2MB. Free memory was 41.4MB in the beginning and 39.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,945 INFO L158 Benchmark]: RCFGBuilder took 1076.93ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 39.3MB in the beginning and 71.2MB in the end (delta: -31.8MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,945 INFO L158 Benchmark]: TraceAbstraction took 100704.95ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 70.7MB in the beginning and 69.1MB in the end (delta: 1.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-25 20:09:00,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 69.2MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 710.78ms. Allocated memory is still 69.2MB. Free memory was 50.1MB in the beginning and 43.9MB in the end (delta: 6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.92ms. Allocated memory is still 69.2MB. Free memory was 43.6MB in the beginning and 41.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 94.44ms. Allocated memory is still 69.2MB. Free memory was 41.4MB in the beginning and 39.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1076.93ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 39.3MB in the beginning and 71.2MB in the end (delta: -31.8MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * TraceAbstraction took 100704.95ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 70.7MB in the beginning and 69.1MB in the end (delta: 1.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@450b5621 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@450b5621: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-25 20:09:00,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6dac8c5-5236-47a3-8069-57bd349cac04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@450b5621