./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs --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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs --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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:28:53,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:28:53,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:28:53,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:28:53,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:28:53,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:28:53,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:28:53,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:28:53,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:28:53,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:28:53,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:28:53,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:28:53,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:28:53,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:28:53,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:28:53,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:28:53,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:28:53,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:28:53,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:28:53,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:28:53,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:28:53,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:28:53,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:28:53,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:28:53,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:28:53,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:28:53,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:28:53,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:28:53,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:28:53,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:28:53,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:28:53,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:28:53,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:28:53,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:28:53,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:28:53,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:28:53,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:28:53,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:28:53,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:28:53,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:28:53,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:28:53,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:28:53,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:28:53,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:28:53,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:28:53,960 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:28:53,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:28:53,961 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:28:53,961 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:28:53,961 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:28:53,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:28:53,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:28:53,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:28:53,964 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:28:53,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:28:53,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:28:53,965 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:28:53,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:28:53,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:28:53,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:28:53,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:28:53,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:28:53,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:28:53,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:28:53,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:28:53,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:28:53,969 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:28:53,970 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:28:53,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:28:53,972 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:28:53,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:28:53,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:28:53,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:28:53,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:28:53,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:28:53,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:28:53,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:28:53,974 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:28:53,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:28:53,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:28:53,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:28:53,975 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_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-10-16 02:28:54,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:28:54,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:28:54,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:28:54,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:28:54,310 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:28:54,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-16 02:28:54,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/400f97fda/4d6b110627ec41c08526ceb8a842d8db/FLAGf06bc44b6 [2021-10-16 02:28:55,013 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:28:55,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-16 02:28:55,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/400f97fda/4d6b110627ec41c08526ceb8a842d8db/FLAGf06bc44b6 [2021-10-16 02:28:55,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/400f97fda/4d6b110627ec41c08526ceb8a842d8db [2021-10-16 02:28:55,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:28:55,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:28:55,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:28:55,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:28:55,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:28:55,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50a473f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55, skipping insertion in model container [2021-10-16 02:28:55,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:28:55,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:28:55,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:28:55,653 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:28:55,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:28:55,743 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:28:55,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55 WrapperNode [2021-10-16 02:28:55,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:28:55,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:28:55,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:28:55,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:28:55,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:28:55,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:28:55,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:28:55,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:28:55,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:28:55,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:28:55,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:28:55,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:28:55,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (1/1) ... [2021-10-16 02:28:55,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:28:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:28:55,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:28:55,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:28:55,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:28:55,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:28:55,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:28:55,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:28:55,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:28:55,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:28:55,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:28:55,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:28:55,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:28:56,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:28:56,774 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:28:56,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:28:56 BoogieIcfgContainer [2021-10-16 02:28:56,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:28:56,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:28:56,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:28:56,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:28:56,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:28:55" (1/3) ... [2021-10-16 02:28:56,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6a77de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:28:56, skipping insertion in model container [2021-10-16 02:28:56,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:28:55" (2/3) ... [2021-10-16 02:28:56,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6a77de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:28:56, skipping insertion in model container [2021-10-16 02:28:56,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:28:56" (3/3) ... [2021-10-16 02:28:56,793 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-10-16 02:28:56,805 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:28:56,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-10-16 02:28:56,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:28:56,861 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:28:56,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-10-16 02:28:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:28:56,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:56,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:28:56,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 160681, now seen corresponding path program 1 times [2021-10-16 02:28:56,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:56,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159205073] [2021-10-16 02:28:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:56,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:57,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:57,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159205073] [2021-10-16 02:28:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159205073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:57,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:28:57,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044886036] [2021-10-16 02:28:57,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:28:57,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:57,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:28:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:28:57,200 INFO L87 Difference]: Start difference. First operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:57,359 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-16 02:28:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:28:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:28:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:57,371 INFO L225 Difference]: With dead ends: 101 [2021-10-16 02:28:57,372 INFO L226 Difference]: Without dead ends: 100 [2021-10-16 02:28:57,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:28:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-16 02:28:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-10-16 02:28:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-10-16 02:28:57,423 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 3 [2021-10-16 02:28:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:57,426 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-10-16 02:28:57,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-10-16 02:28:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:28:57,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:57,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:28:57,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:28:57,428 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:57,432 INFO L82 PathProgramCache]: Analyzing trace with hash 160682, now seen corresponding path program 1 times [2021-10-16 02:28:57,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:57,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666654634] [2021-10-16 02:28:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:57,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:57,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:57,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666654634] [2021-10-16 02:28:57,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666654634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:57,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:57,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:28:57,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105433054] [2021-10-16 02:28:57,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:28:57,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:28:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:28:57,564 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:57,788 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-10-16 02:28:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:28:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:28:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:57,791 INFO L225 Difference]: With dead ends: 170 [2021-10-16 02:28:57,791 INFO L226 Difference]: Without dead ends: 170 [2021-10-16 02:28:57,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:28:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-16 02:28:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 79. [2021-10-16 02:28:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-10-16 02:28:57,802 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 3 [2021-10-16 02:28:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:57,802 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-10-16 02:28:57,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-10-16 02:28:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:28:57,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:57,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:28:57,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:28:57,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash 4981091, now seen corresponding path program 1 times [2021-10-16 02:28:57,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:57,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820769289] [2021-10-16 02:28:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:57,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:57,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:57,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820769289] [2021-10-16 02:28:57,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820769289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:57,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:28:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058049700] [2021-10-16 02:28:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:28:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:28:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:28:57,840 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:57,909 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-10-16 02:28:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:28:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:28:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:57,911 INFO L225 Difference]: With dead ends: 92 [2021-10-16 02:28:57,911 INFO L226 Difference]: Without dead ends: 92 [2021-10-16 02:28:57,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:28:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-16 02:28:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-10-16 02:28:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-10-16 02:28:57,919 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 4 [2021-10-16 02:28:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:57,919 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-10-16 02:28:57,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-10-16 02:28:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:28:57,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:57,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:28:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:28:57,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash 4981092, now seen corresponding path program 1 times [2021-10-16 02:28:57,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410223350] [2021-10-16 02:28:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:57,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:57,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:57,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410223350] [2021-10-16 02:28:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410223350] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:57,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:57,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:28:57,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441202086] [2021-10-16 02:28:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:28:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:28:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:28:57,995 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:58,053 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-16 02:28:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:28:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:28:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:58,056 INFO L225 Difference]: With dead ends: 72 [2021-10-16 02:28:58,056 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 02:28:58,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:28:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 02:28:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-10-16 02:28:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-10-16 02:28:58,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 4 [2021-10-16 02:28:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-10-16 02:28:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-10-16 02:28:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:28:58,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:58,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:58,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:28:58,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash 341578850, now seen corresponding path program 1 times [2021-10-16 02:28:58,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:58,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929650612] [2021-10-16 02:28:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:58,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:58,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:58,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929650612] [2021-10-16 02:28:58,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929650612] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:58,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:58,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:28:58,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416798323] [2021-10-16 02:28:58,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:28:58,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:28:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:28:58,189 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:58,371 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-16 02:28:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:28:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:28:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:58,374 INFO L225 Difference]: With dead ends: 79 [2021-10-16 02:28:58,374 INFO L226 Difference]: Without dead ends: 79 [2021-10-16 02:28:58,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:28:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-16 02:28:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-16 02:28:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-10-16 02:28:58,385 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 8 [2021-10-16 02:28:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:58,386 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-10-16 02:28:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-10-16 02:28:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:28:58,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:58,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:58,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:28:58,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash 341591076, now seen corresponding path program 1 times [2021-10-16 02:28:58,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:58,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107819435] [2021-10-16 02:28:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:58,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:58,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:58,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107819435] [2021-10-16 02:28:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107819435] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:58,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:58,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:28:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632939636] [2021-10-16 02:28:58,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:28:58,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:28:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:28:58,549 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:58,687 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-10-16 02:28:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:28:58,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:28:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:58,688 INFO L225 Difference]: With dead ends: 91 [2021-10-16 02:28:58,689 INFO L226 Difference]: Without dead ends: 91 [2021-10-16 02:28:58,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:28:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-16 02:28:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-10-16 02:28:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-10-16 02:28:58,709 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 8 [2021-10-16 02:28:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:58,709 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-10-16 02:28:58,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-10-16 02:28:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:28:58,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:58,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:58,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:28:58,711 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1279779499, now seen corresponding path program 1 times [2021-10-16 02:28:58,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:58,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055646230] [2021-10-16 02:28:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:58,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:58,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055646230] [2021-10-16 02:28:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055646230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:58,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:58,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:28:58,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483566022] [2021-10-16 02:28:58,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:28:58,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:28:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:28:58,784 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:58,802 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-10-16 02:28:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:28:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:28:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:58,803 INFO L225 Difference]: With dead ends: 55 [2021-10-16 02:28:58,803 INFO L226 Difference]: Without dead ends: 55 [2021-10-16 02:28:58,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:28:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-16 02:28:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-10-16 02:28:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-10-16 02:28:58,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 12 [2021-10-16 02:28:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-10-16 02:28:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-10-16 02:28:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:28:58,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:58,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:28:58,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1017195350, now seen corresponding path program 1 times [2021-10-16 02:28:58,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:58,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670606226] [2021-10-16 02:28:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:58,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:58,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:58,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670606226] [2021-10-16 02:28:58,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670606226] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:58,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:58,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:28:58,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479878894] [2021-10-16 02:28:58,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:28:58,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:58,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:28:58,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:28:58,932 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:59,062 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-10-16 02:28:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:28:59,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:28:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:59,063 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:28:59,064 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:28:59,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:28:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:28:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-16 02:28:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-10-16 02:28:59,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 13 [2021-10-16 02:28:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-10-16 02:28:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-10-16 02:28:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:28:59,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:59,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:59,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:28:59,072 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1017195351, now seen corresponding path program 1 times [2021-10-16 02:28:59,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:59,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641779272] [2021-10-16 02:28:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:59,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:59,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:59,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641779272] [2021-10-16 02:28:59,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641779272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:59,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:59,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:28:59,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688100353] [2021-10-16 02:28:59,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:28:59,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:28:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:28:59,208 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:59,322 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-16 02:28:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:28:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:28:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:59,323 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:28:59,323 INFO L226 Difference]: Without dead ends: 51 [2021-10-16 02:28:59,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:28:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-16 02:28:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-16 02:28:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-10-16 02:28:59,329 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 13 [2021-10-16 02:28:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:59,329 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-10-16 02:28:59,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-10-16 02:28:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:28:59,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:59,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:59,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:28:59,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1727753933, now seen corresponding path program 1 times [2021-10-16 02:28:59,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:59,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871880277] [2021-10-16 02:28:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:59,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:59,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:59,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871880277] [2021-10-16 02:28:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871880277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:59,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:59,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:28:59,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921369698] [2021-10-16 02:28:59,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:28:59,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:28:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:28:59,383 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:59,455 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-10-16 02:28:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:28:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:28:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:59,457 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:28:59,457 INFO L226 Difference]: Without dead ends: 50 [2021-10-16 02:28:59,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:28:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-16 02:28:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-16 02:28:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-10-16 02:28:59,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 15 [2021-10-16 02:28:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:59,460 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-10-16 02:28:59,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-10-16 02:28:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:28:59,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:59,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:59,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:28:59,461 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2020764258, now seen corresponding path program 1 times [2021-10-16 02:28:59,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:59,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811032334] [2021-10-16 02:28:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:59,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:59,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:59,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811032334] [2021-10-16 02:28:59,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811032334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:28:59,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:28:59,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:28:59,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026109511] [2021-10-16 02:28:59,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:28:59,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:28:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:28:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:28:59,519 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:28:59,602 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-10-16 02:28:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:28:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:28:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:28:59,603 INFO L225 Difference]: With dead ends: 49 [2021-10-16 02:28:59,603 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:28:59,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:28:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:28:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-16 02:28:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.5) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-10-16 02:28:59,604 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 16 [2021-10-16 02:28:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:28:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-10-16 02:28:59,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:28:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-10-16 02:28:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:28:59,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:28:59,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:28:59,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:28:59,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:28:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:28:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1513567066, now seen corresponding path program 1 times [2021-10-16 02:28:59,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:28:59,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594670339] [2021-10-16 02:28:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:59,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:28:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:28:59,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:28:59,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594670339] [2021-10-16 02:28:59,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594670339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:28:59,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714104011] [2021-10-16 02:28:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:28:59,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:28:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:28:59,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:28:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:28:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:28:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-16 02:28:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:00,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:29:00,184 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-16 02:29:00,184 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 29 [2021-10-16 02:29:00,327 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:00,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-16 02:29:00,503 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 21 [2021-10-16 02:29:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-16 02:29:02,881 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:29:02,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2021-10-16 02:29:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714104011] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:02,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296377130] [2021-10-16 02:29:02,953 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-16 02:29:02,953 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:29:02,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:29:02,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:29:02,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:29:02,996 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:02,998 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:29:02,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-16 02:29:03,001 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:29:03,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:29:03,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-16 02:29:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:03,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:03,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:03,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:29:03,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:29:03,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:29:03,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:29:03,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:29:03,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:29:03,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 151 [2021-10-16 02:29:03,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:29:03,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:148, output treesize:151 [2021-10-16 02:29:03,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:03,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:29:03,290 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_92| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:29:03,293 INFO L168 Benchmark]: Toolchain (without parser) took 8040.20 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 75.0 MB in the beginning and 104.7 MB in the end (delta: -29.7 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:03,293 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:03,293 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.10 ms. Allocated memory is still 96.5 MB. Free memory was 74.8 MB in the beginning and 66.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:03,294 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.25 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 64.1 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:03,294 INFO L168 Benchmark]: Boogie Preprocessor took 54.52 ms. Allocated memory is still 96.5 MB. Free memory was 64.1 MB in the beginning and 62.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:03,294 INFO L168 Benchmark]: RCFGBuilder took 894.62 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 42.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:29:03,295 INFO L168 Benchmark]: TraceAbstraction took 6509.68 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 41.8 MB in the beginning and 104.7 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:29:03,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 490.10 ms. Allocated memory is still 96.5 MB. Free memory was 74.8 MB in the beginning and 66.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.25 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 64.1 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.52 ms. Allocated memory is still 96.5 MB. Free memory was 64.1 MB in the beginning and 62.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 894.62 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 42.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6509.68 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 41.8 MB in the beginning and 104.7 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_92| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_92|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:29:03,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:29:06,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:29:06,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:29:06,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:29:06,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:29:06,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:29:06,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:29:06,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:29:06,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:29:06,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:29:06,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:29:06,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:29:06,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:29:06,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:29:06,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:29:06,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:29:06,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:29:06,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:29:06,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:29:06,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:29:06,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:29:06,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:29:06,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:29:06,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:29:06,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:29:06,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:29:06,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:29:06,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:29:06,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:29:06,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:29:06,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:29:06,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:29:06,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:29:06,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:29:06,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:29:06,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:29:06,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:29:06,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:29:06,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:29:06,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:29:06,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:29:06,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:29:06,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:29:06,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:29:06,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:29:06,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:29:06,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:29:06,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:29:06,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:29:06,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:29:06,398 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:29:06,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:29:06,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:29:06,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:29:06,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:29:06,401 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:29:06,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:29:06,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:29:06,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:29:06,402 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:29:06,402 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:29:06,402 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:29:06,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:29:06,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:29:06,403 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:29:06,403 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:29:06,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:29:06,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:29:06,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:29:06,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:29:06,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:29:06,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:29:06,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:29:06,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:29:06,405 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:29:06,406 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:29:06,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:29:06,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:29:06,406 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_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-10-16 02:29:06,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:29:06,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:29:06,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:29:06,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:29:06,924 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:29:06,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-16 02:29:07,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/9c670714b/a0c8c769986b471bb33d3d7bd8b1f5b2/FLAGe06392c24 [2021-10-16 02:29:07,675 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:29:07,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-16 02:29:07,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/9c670714b/a0c8c769986b471bb33d3d7bd8b1f5b2/FLAGe06392c24 [2021-10-16 02:29:07,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/data/9c670714b/a0c8c769986b471bb33d3d7bd8b1f5b2 [2021-10-16 02:29:07,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:29:07,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:29:07,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:29:07,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:29:07,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:29:07,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:29:07" (1/1) ... [2021-10-16 02:29:07,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af02195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:07, skipping insertion in model container [2021-10-16 02:29:07,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:29:07" (1/1) ... [2021-10-16 02:29:07,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:29:08,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:29:08,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:29:08,430 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:29:08,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:29:08,541 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:29:08,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08 WrapperNode [2021-10-16 02:29:08,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:29:08,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:29:08,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:29:08,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:29:08,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:29:08,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:29:08,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:29:08,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:29:08,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:29:08,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:29:08,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:29:08,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:29:08,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (1/1) ... [2021-10-16 02:29:08,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:29:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:29:08,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:29:08,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:29:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:29:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:29:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:29:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:29:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:29:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:29:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:29:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:29:08,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:29:09,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:29:09,495 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:29:09,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:29:09 BoogieIcfgContainer [2021-10-16 02:29:09,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:29:09,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:29:09,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:29:09,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:29:09,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:29:07" (1/3) ... [2021-10-16 02:29:09,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c96e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:29:09, skipping insertion in model container [2021-10-16 02:29:09,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:29:08" (2/3) ... [2021-10-16 02:29:09,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c96e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:29:09, skipping insertion in model container [2021-10-16 02:29:09,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:29:09" (3/3) ... [2021-10-16 02:29:09,508 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-10-16 02:29:09,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:29:09,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-10-16 02:29:09,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:29:09,582 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:29:09,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-10-16 02:29:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:29:09,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:09,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:29:09,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2021-10-16 02:29:09,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:09,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545115479] [2021-10-16 02:29:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:09,634 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:09,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:09,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:29:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:29:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:09,870 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 [2021-10-16 02:29:09,991 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:29:09,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-10-16 02:29:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:10,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:10,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:10,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545115479] [2021-10-16 02:29:10,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545115479] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:10,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:10,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:29:10,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305742591] [2021-10-16 02:29:10,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:29:10,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:29:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:29:10,154 INFO L87 Difference]: Start difference. First operand has 90 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:10,513 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-10-16 02:29:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:29:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:29:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:10,524 INFO L225 Difference]: With dead ends: 115 [2021-10-16 02:29:10,525 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 02:29:10,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:29:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 02:29:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2021-10-16 02:29:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-10-16 02:29:10,576 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 4 [2021-10-16 02:29:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:10,577 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-10-16 02:29:10,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-10-16 02:29:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:29:10,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:10,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:29:10,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:10,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:10,790 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2021-10-16 02:29:10,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:10,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362326702] [2021-10-16 02:29:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:10,792 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:10,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:10,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:29:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:29:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:10,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:29:10,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:29:11,003 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:29:11,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-16 02:29:11,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:29:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-10-16 02:29:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:11,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:11,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362326702] [2021-10-16 02:29:11,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362326702] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:11,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:11,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:29:11,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175746715] [2021-10-16 02:29:11,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:29:11,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:11,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:29:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:29:11,733 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:34,788 INFO L93 Difference]: Finished difference Result 195 states and 214 transitions. [2021-10-16 02:29:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:29:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 02:29:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:34,794 INFO L225 Difference]: With dead ends: 195 [2021-10-16 02:29:34,794 INFO L226 Difference]: Without dead ends: 195 [2021-10-16 02:29:34,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2151.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:29:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-16 02:29:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 88. [2021-10-16 02:29:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.830188679245283) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-10-16 02:29:34,821 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 4 [2021-10-16 02:29:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:34,821 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-10-16 02:29:34,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-10-16 02:29:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:29:34,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:34,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:29:34,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:35,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:35,023 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2021-10-16 02:29:35,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:35,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694622574] [2021-10-16 02:29:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:35,026 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:35,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:35,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:29:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:29:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:35,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:29:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:35,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:35,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:35,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694622574] [2021-10-16 02:29:35,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694622574] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:35,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:35,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:29:35,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78689929] [2021-10-16 02:29:35,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:29:35,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:29:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:29:35,197 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:35,425 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-16 02:29:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:29:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:29:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:35,427 INFO L225 Difference]: With dead ends: 102 [2021-10-16 02:29:35,427 INFO L226 Difference]: Without dead ends: 102 [2021-10-16 02:29:35,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:29:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-16 02:29:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2021-10-16 02:29:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-10-16 02:29:35,436 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 5 [2021-10-16 02:29:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:35,436 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-10-16 02:29:35,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-10-16 02:29:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:29:35,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:35,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:29:35,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:35,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:35,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2021-10-16 02:29:35,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:35,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626504889] [2021-10-16 02:29:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:35,655 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:35,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:35,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:29:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:29:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:29:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:35,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:35,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:35,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626504889] [2021-10-16 02:29:35,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626504889] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:35,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:35,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:29:35,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492663559] [2021-10-16 02:29:35,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:29:35,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:29:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:29:35,954 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:36,198 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-10-16 02:29:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:29:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:29:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:36,200 INFO L225 Difference]: With dead ends: 81 [2021-10-16 02:29:36,200 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 02:29:36,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:29:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 02:29:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-10-16 02:29:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.679245283018868) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-10-16 02:29:36,208 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 5 [2021-10-16 02:29:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:36,209 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-10-16 02:29:36,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-10-16 02:29:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:29:36,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:36,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:36,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:36,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:36,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2021-10-16 02:29:36,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:36,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84136579] [2021-10-16 02:29:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:36,427 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:36,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:29:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:29:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:36,796 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:36,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-10-16 02:29:36,835 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:36,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-10-16 02:29:36,986 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 35 [2021-10-16 02:29:36,997 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:36,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-16 02:29:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:37,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:37,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:37,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84136579] [2021-10-16 02:29:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84136579] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:37,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:37,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-10-16 02:29:37,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344817001] [2021-10-16 02:29:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:29:37,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:29:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:29:37,230 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:38,453 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-16 02:29:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:29:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:29:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:38,455 INFO L225 Difference]: With dead ends: 91 [2021-10-16 02:29:38,456 INFO L226 Difference]: Without dead ends: 91 [2021-10-16 02:29:38,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:29:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-16 02:29:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-10-16 02:29:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-10-16 02:29:38,475 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 10 [2021-10-16 02:29:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:38,476 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-10-16 02:29:38,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-10-16 02:29:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:29:38,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:38,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:38,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:38,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1870124675, now seen corresponding path program 1 times [2021-10-16 02:29:38,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:38,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159349332] [2021-10-16 02:29:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:38,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:38,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:29:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:29:38,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:38,989 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 20 treesize of output 16 [2021-10-16 02:29:39,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-16 02:29:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:39,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-16 02:29:39,372 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:29:39,372 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 36 treesize of output 33 [2021-10-16 02:29:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:39,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:39,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159349332] [2021-10-16 02:29:39,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159349332] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:39,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:39,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-16 02:29:39,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084604408] [2021-10-16 02:29:39,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:29:39,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:29:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:29:39,497 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:40,249 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-16 02:29:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:29:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:29:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:40,251 INFO L225 Difference]: With dead ends: 102 [2021-10-16 02:29:40,251 INFO L226 Difference]: Without dead ends: 102 [2021-10-16 02:29:40,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:29:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-16 02:29:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-10-16 02:29:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-16 02:29:40,260 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 17 [2021-10-16 02:29:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:40,261 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-16 02:29:40,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-16 02:29:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:29:40,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:40,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:40,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:40,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:40,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1870124676, now seen corresponding path program 1 times [2021-10-16 02:29:40,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:40,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052787333] [2021-10-16 02:29:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:40,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:40,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:40,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:29:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:40,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:29:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 02:29:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:29:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-16 02:29:41,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-16 02:29:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:41,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:41,309 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 36 treesize of output 28 [2021-10-16 02:29:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:29:41,545 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 28 treesize of output 24 [2021-10-16 02:29:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:41,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:41,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052787333] [2021-10-16 02:29:41,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052787333] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:41,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:41,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:29:41,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866129178] [2021-10-16 02:29:41,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:29:41,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:41,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:29:41,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:29:41,928 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:42,915 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-10-16 02:29:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:29:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:29:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:42,918 INFO L225 Difference]: With dead ends: 97 [2021-10-16 02:29:42,918 INFO L226 Difference]: Without dead ends: 97 [2021-10-16 02:29:42,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:29:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-16 02:29:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-10-16 02:29:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-10-16 02:29:42,927 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 17 [2021-10-16 02:29:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:42,928 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-10-16 02:29:42,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-10-16 02:29:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:29:42,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:42,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:42,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:43,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1870110741, now seen corresponding path program 1 times [2021-10-16 02:29:43,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:43,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872668164] [2021-10-16 02:29:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:43,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:43,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:43,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:29:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:29:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:43,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:43,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:43,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872668164] [2021-10-16 02:29:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872668164] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:43,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:43,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:29:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920092263] [2021-10-16 02:29:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:29:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:29:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:29:43,506 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:43,629 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2021-10-16 02:29:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:29:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:29:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:43,632 INFO L225 Difference]: With dead ends: 172 [2021-10-16 02:29:43,632 INFO L226 Difference]: Without dead ends: 172 [2021-10-16 02:29:43,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:29:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-16 02:29:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2021-10-16 02:29:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 112 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2021-10-16 02:29:43,647 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 17 [2021-10-16 02:29:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:43,648 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2021-10-16 02:29:43,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2021-10-16 02:29:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:29:43,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:43,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:43,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:43,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:43,867 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1431526068, now seen corresponding path program 1 times [2021-10-16 02:29:43,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:43,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855608721] [2021-10-16 02:29:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:43,868 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:43,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:43,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:43,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:29:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:44,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:29:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:44,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:29:44,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:29:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:44,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:44,393 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 24 [2021-10-16 02:29:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:44,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:44,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855608721] [2021-10-16 02:29:44,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855608721] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:44,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:44,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:29:44,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865436856] [2021-10-16 02:29:44,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:29:44,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:29:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:29:44,567 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:44,918 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2021-10-16 02:29:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:29:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-16 02:29:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:44,920 INFO L225 Difference]: With dead ends: 125 [2021-10-16 02:29:44,920 INFO L226 Difference]: Without dead ends: 125 [2021-10-16 02:29:44,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:29:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-16 02:29:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2021-10-16 02:29:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 96 states have (on average 1.375) internal successors, (132), 111 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2021-10-16 02:29:44,927 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 20 [2021-10-16 02:29:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:44,928 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2021-10-16 02:29:44,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2021-10-16 02:29:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:29:44,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:44,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:44,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-16 02:29:45,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:45,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:45,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1427635036, now seen corresponding path program 1 times [2021-10-16 02:29:45,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:45,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501235771] [2021-10-16 02:29:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:45,163 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:45,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:29:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:29:45,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:45,651 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 15 [2021-10-16 02:29:45,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-16 02:29:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:45,995 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 24 [2021-10-16 02:29:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:46,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:46,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501235771] [2021-10-16 02:29:46,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501235771] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:29:46,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:29:46,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-16 02:29:46,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912157476] [2021-10-16 02:29:46,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:29:46,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:29:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:29:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:29:46,240 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:29:46,872 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2021-10-16 02:29:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:29:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:29:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:29:46,875 INFO L225 Difference]: With dead ends: 124 [2021-10-16 02:29:46,875 INFO L226 Difference]: Without dead ends: 124 [2021-10-16 02:29:46,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:29:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-16 02:29:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-10-16 02:29:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-10-16 02:29:46,880 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 21 [2021-10-16 02:29:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:29:46,880 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-10-16 02:29:46,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:29:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-10-16 02:29:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:29:46,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:29:46,882 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:29:46,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:29:47,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:29:47,093 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:29:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:29:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 717052317, now seen corresponding path program 1 times [2021-10-16 02:29:47,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:29:47,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955537135] [2021-10-16 02:29:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:47,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:29:47,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:29:47,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:29:47,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:29:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:29:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:47,516 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 20 treesize of output 16 [2021-10-16 02:29:47,584 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-10-16 02:29:47,585 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 21 treesize of output 26 [2021-10-16 02:29:47,729 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-10-16 02:29:47,916 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:47,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 26 [2021-10-16 02:29:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-16 02:29:48,342 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:29:48,343 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 35 treesize of output 32 [2021-10-16 02:29:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:48,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:29:48,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955537135] [2021-10-16 02:29:48,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955537135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:48,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398346409] [2021-10-16 02:29:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:48,440 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:29:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:29:48,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:29:48,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:29:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:48,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:29:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:48,970 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 8 treesize of output 6 [2021-10-16 02:29:49,166 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 20 treesize of output 16 [2021-10-16 02:29:49,293 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-10-16 02:29:49,293 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 23 treesize of output 28 [2021-10-16 02:29:49,493 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:49,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2021-10-16 02:29:49,674 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 30 [2021-10-16 02:29:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:49,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:49,890 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 42 treesize of output 38 [2021-10-16 02:29:50,051 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:29:50,052 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 35 treesize of output 32 [2021-10-16 02:29:50,157 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 [2021-10-16 02:29:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:50,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [398346409] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:29:50,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136249531] [2021-10-16 02:29:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:29:50,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:29:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:29:50,172 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:29:50,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:29:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:29:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:29:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:29:50,590 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 20 treesize of output 16 [2021-10-16 02:29:50,654 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-16 02:29:50,654 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 27 treesize of output 38 [2021-10-16 02:29:50,875 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:29:50,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 31 [2021-10-16 02:29:51,098 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:29:51,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 31 [2021-10-16 02:29:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:29:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:29:59,489 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 71 treesize of output 67 [2021-10-16 02:30:11,948 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:30:11,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 88 [2021-10-16 02:30:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136249531] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:12,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:30:12,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 25 [2021-10-16 02:30:12,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801328187] [2021-10-16 02:30:12,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:30:12,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:30:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=562, Unknown=7, NotChecked=0, Total=650 [2021-10-16 02:30:12,118 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:17,365 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-10-16 02:30:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:30:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:30:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:17,368 INFO L225 Difference]: With dead ends: 127 [2021-10-16 02:30:17,368 INFO L226 Difference]: Without dead ends: 127 [2021-10-16 02:30:17,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 22332.1ms TimeCoverageRelationStatistics Valid=262, Invalid=921, Unknown=7, NotChecked=0, Total=1190 [2021-10-16 02:30:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-16 02:30:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2021-10-16 02:30:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 96 states have (on average 1.3229166666666667) internal successors, (127), 109 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2021-10-16 02:30:17,374 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 21 [2021-10-16 02:30:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:17,374 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2021-10-16 02:30:17,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2021-10-16 02:30:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:30:17,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:17,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:17,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:17,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:17,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:30:17,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:30:17,980 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:30:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 717052318, now seen corresponding path program 1 times [2021-10-16 02:30:17,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:30:17,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677722388] [2021-10-16 02:30:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:17,981 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:30:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:30:17,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:30:17,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:30:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:30:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:18,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:30:18,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:30:18,629 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:30:18,633 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 25 treesize of output 27 [2021-10-16 02:30:18,651 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:30:18,652 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 24 treesize of output 24 [2021-10-16 02:30:18,892 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 34 treesize of output 30 [2021-10-16 02:30:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:30:19,115 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:30:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-16 02:30:19,160 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-10-16 02:30:19,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2021-10-16 02:30:19,437 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:19,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-10-16 02:30:19,476 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-10-16 02:30:19,750 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:19,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 42 [2021-10-16 02:30:19,760 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:19,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 24 [2021-10-16 02:30:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:23,170 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 107 treesize of output 103 [2021-10-16 02:30:23,176 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 152 treesize of output 136 [2021-10-16 02:30:25,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~item~0.base_32 (_ BitVec 32))) (or (let ((.cse0 (bvadd c_ULTIMATE.start_append_~item~0.offset (_ bv8 32)))) (and (bvule (bvadd c_ULTIMATE.start_append_~item~0.offset (_ bv4 32)) .cse0) (= |c_ULTIMATE.start_main_~#list~0.offset| c_ULTIMATE.start_append_~plist.offset) (= c_ULTIMATE.start_append_~plist.base |c_ULTIMATE.start_main_~#list~0.base|) (bvule .cse0 (select (store |c_#length| v_ULTIMATE.start_append_~item~0.base_32 (_ bv8 32)) c_ULTIMATE.start_append_~item~0.base)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~item~0.base_32))))))) is different from false [2021-10-16 02:30:26,085 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:30:26,085 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 42 treesize of output 41 [2021-10-16 02:30:28,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~item~0.base_32 (_ BitVec 32)) (|v_ULTIMATE.start_append_#t~ite12.base_40| (_ BitVec 32))) (or (let ((.cse0 (bvadd c_ULTIMATE.start_append_~item~0.offset (_ bv8 32)))) (and (bvule (bvadd c_ULTIMATE.start_append_~item~0.offset (_ bv4 32)) .cse0) (bvule .cse0 (select (store (store |c_#length| |v_ULTIMATE.start_append_#t~ite12.base_40| (_ bv8 32)) v_ULTIMATE.start_append_~item~0.base_32 (_ bv8 32)) c_ULTIMATE.start_append_~item~0.base)) (= |c_ULTIMATE.start_main_~#list~0.offset| c_ULTIMATE.start_append_~plist.offset) (= c_ULTIMATE.start_append_~plist.base |c_ULTIMATE.start_main_~#list~0.base|))) (= c_ULTIMATE.start_append_~item~0.base v_ULTIMATE.start_append_~item~0.base_32) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_append_#t~ite12.base_40|))))) is different from false [2021-10-16 02:30:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-16 02:30:30,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:30:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677722388] [2021-10-16 02:30:30,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677722388] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:30,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468125960] [2021-10-16 02:30:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:30,018 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:30:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:30:30,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:30:30,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:30:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:30:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:30:30,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:30:30,867 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:30:30,867 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 26 treesize of output 28 [2021-10-16 02:30:30,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:30:30,891 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 25 treesize of output 25 [2021-10-16 02:30:31,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:30:31,262 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 34 treesize of output 30 [2021-10-16 02:30:31,537 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:30:31,537 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 22 treesize of output 22 [2021-10-16 02:30:31,578 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-10-16 02:30:31,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2021-10-16 02:30:32,056 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 02:30:32,092 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-10-16 02:30:32,373 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 50 [2021-10-16 02:30:32,385 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 24 [2021-10-16 02:30:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:32,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:33,404 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 107 treesize of output 103 [2021-10-16 02:30:33,408 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 152 treesize of output 136 [2021-10-16 02:30:33,678 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:30:33,678 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 42 treesize of output 41 [2021-10-16 02:30:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:40,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [468125960] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:40,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228619563] [2021-10-16 02:30:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:40,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:30:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:40,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:30:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:30:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:40,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 02:30:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:41,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:30:41,151 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 25 treesize of output 21 [2021-10-16 02:30:41,379 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:30:41,379 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 [2021-10-16 02:30:41,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 02:30:41,753 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-10-16 02:30:41,782 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:30:41,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-10-16 02:30:42,057 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 42 [2021-10-16 02:30:42,070 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:30:42,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 24 [2021-10-16 02:30:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:30:42,974 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 107 treesize of output 103 [2021-10-16 02:30:42,978 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 152 treesize of output 136 [2021-10-16 02:30:43,212 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 62 treesize of output 58 [2021-10-16 02:30:43,251 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:30:43,251 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 58 treesize of output 57 [2021-10-16 02:30:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228619563] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:30:45,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:30:45,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 8, 8] total 34 [2021-10-16 02:30:45,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336690366] [2021-10-16 02:30:45,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-16 02:30:45,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:30:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-16 02:30:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=917, Unknown=6, NotChecked=126, Total=1190 [2021-10-16 02:30:45,631 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:53,459 WARN L207 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-10-16 02:31:03,806 WARN L207 SmtUtils]: Spent 10.22 s on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-10-16 02:31:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:20,104 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-10-16 02:31:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 02:31:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:31:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:20,107 INFO L225 Difference]: With dead ends: 133 [2021-10-16 02:31:20,107 INFO L226 Difference]: Without dead ends: 133 [2021-10-16 02:31:20,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 47396.5ms TimeCoverageRelationStatistics Valid=376, Invalid=1518, Unknown=6, NotChecked=170, Total=2070 [2021-10-16 02:31:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-16 02:31:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-10-16 02:31:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.2916666666666667) internal successors, (124), 108 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-10-16 02:31:20,114 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 21 [2021-10-16 02:31:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:20,115 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-10-16 02:31:20,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-10-16 02:31:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:31:20,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:20,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:20,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:20,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:20,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 02:31:20,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:20,729 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:31:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1307013042, now seen corresponding path program 1 times [2021-10-16 02:31:20,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:20,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739977036] [2021-10-16 02:31:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:20,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:20,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:20,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:31:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:31:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:21,427 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 20 treesize of output 16 [2021-10-16 02:31:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-16 02:31:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:21,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:21,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-16 02:31:21,819 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:31:21,819 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 36 treesize of output 33 [2021-10-16 02:31:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:21,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:21,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739977036] [2021-10-16 02:31:21,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739977036] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:31:21,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:31:21,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-16 02:31:21,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348579910] [2021-10-16 02:31:21,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:31:21,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:31:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:31:21,914 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:22,457 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-16 02:31:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:31:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:31:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:22,459 INFO L225 Difference]: With dead ends: 118 [2021-10-16 02:31:22,459 INFO L226 Difference]: Without dead ends: 118 [2021-10-16 02:31:22,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:31:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-16 02:31:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-10-16 02:31:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 107 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2021-10-16 02:31:22,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 22 [2021-10-16 02:31:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2021-10-16 02:31:22,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2021-10-16 02:31:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:31:22,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:22,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:22,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:22,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:22,673 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:31:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:22,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1862698521, now seen corresponding path program 1 times [2021-10-16 02:31:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:22,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865544044] [2021-10-16 02:31:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:22,674 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:22,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:22,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:31:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:23,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:31:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:23,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:31:23,157 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:31:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 02:31:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-16 02:31:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-16 02:31:23,484 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:31:23,484 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 21 treesize of output 26 [2021-10-16 02:31:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:23,688 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 50 treesize of output 46 [2021-10-16 02:31:23,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:23,702 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 46 treesize of output 50 [2021-10-16 02:31:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:23,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:23,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865544044] [2021-10-16 02:31:23,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865544044] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:31:23,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:31:23,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2021-10-16 02:31:23,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134153025] [2021-10-16 02:31:23,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:31:23,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:31:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:31:23,878 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:40,544 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2021-10-16 02:31:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:31:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:31:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:40,547 INFO L225 Difference]: With dead ends: 131 [2021-10-16 02:31:40,547 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:31:40,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:31:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:31:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 107. [2021-10-16 02:31:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.25) internal successors, (120), 106 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2021-10-16 02:31:40,552 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 23 [2021-10-16 02:31:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:40,553 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2021-10-16 02:31:40,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2021-10-16 02:31:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:31:40,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:40,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:40,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-16 02:31:40,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:40,770 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:31:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1862698520, now seen corresponding path program 1 times [2021-10-16 02:31:40,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:40,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586855112] [2021-10-16 02:31:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:40,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:40,772 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:40,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:31:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:31:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:41,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:41,566 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 8 treesize of output 6 [2021-10-16 02:31:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:41,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:41,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586855112] [2021-10-16 02:31:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586855112] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:31:41,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:31:41,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:31:41,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863360650] [2021-10-16 02:31:41,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:31:41,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:31:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:31:41,679 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:41,781 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-10-16 02:31:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:31:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:31:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:41,782 INFO L225 Difference]: With dead ends: 103 [2021-10-16 02:31:41,783 INFO L226 Difference]: Without dead ends: 103 [2021-10-16 02:31:41,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:31:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-16 02:31:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-10-16 02:31:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2021-10-16 02:31:41,787 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 23 [2021-10-16 02:31:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:41,788 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2021-10-16 02:31:41,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2021-10-16 02:31:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:31:41,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:41,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:41,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:41,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:41,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-10-16 02:31:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash 577213201, now seen corresponding path program 1 times [2021-10-16 02:31:41,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:41,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812904078] [2021-10-16 02:31:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:41,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:42,000 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:42,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:31:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:31:42,520 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:31:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:31:42,714 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:31:42,715 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:31:42,716 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:31:42,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:31:42,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:31:42,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 02:31:42,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 02:31:42,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 02:31:42,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 02:31:42,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 02:31:42,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 02:31:42,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 02:31:42,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 02:31:42,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 02:31:42,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 02:31:42,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 02:31:42,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 02:31:42,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 02:31:42,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 02:31:42,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 02:31:42,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 02:31:42,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 02:31:42,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-16 02:31:42,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-16 02:31:42,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-16 02:31:42,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-16 02:31:42,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-16 02:31:42,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:31:42,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-16 02:31:42,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-16 02:31:42,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:42,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:42,948 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:31:43,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:31:43 BoogieIcfgContainer [2021-10-16 02:31:43,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:31:43,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:31:43,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:31:43,018 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:31:43,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:29:09" (3/4) ... [2021-10-16 02:31:43,038 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:31:43,039 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:31:43,040 INFO L168 Benchmark]: Toolchain (without parser) took 155103.23 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 48.4 MB in the beginning and 63.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,043 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 83.9 MB. Free memory was 65.9 MB in the beginning and 65.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:31:43,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.96 ms. Allocated memory is still 83.9 MB. Free memory was 48.2 MB in the beginning and 61.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.13 ms. Allocated memory is still 83.9 MB. Free memory was 61.1 MB in the beginning and 59.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,045 INFO L168 Benchmark]: Boogie Preprocessor took 42.51 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 57.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,045 INFO L168 Benchmark]: RCFGBuilder took 850.02 ms. Allocated memory is still 83.9 MB. Free memory was 57.2 MB in the beginning and 39.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,046 INFO L168 Benchmark]: TraceAbstraction took 153516.61 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 39.1 MB in the beginning and 63.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:43,046 INFO L168 Benchmark]: Witness Printer took 21.27 ms. Allocated memory is still 104.9 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:31:43,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 83.9 MB. Free memory was 65.9 MB in the beginning and 65.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 597.96 ms. Allocated memory is still 83.9 MB. Free memory was 48.2 MB in the beginning and 61.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.13 ms. Allocated memory is still 83.9 MB. Free memory was 61.1 MB in the beginning and 59.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.51 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 57.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 850.02 ms. Allocated memory is still 83.9 MB. Free memory was 57.2 MB in the beginning and 39.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 153516.61 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 39.1 MB in the beginning and 63.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. * Witness Printer took 21.27 ms. Allocated memory is still 104.9 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [c=0] [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [c=1] [L533] item->next = *plist VAL [c=1] [L534] EXPR item->next VAL [c=1] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [c=1] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [c=1] [L537] *plist = item VAL [c=1] [L545] length++ VAL [c=1] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [c=1] [L548] COND FALSE !(length < 0) VAL [c=1] [L551] EXPR \read(*list) VAL [c=1] [L551] EXPR list->next VAL [c=1] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [c=1] [L552] free(list) VAL [c=1] [L552] free(list) VAL [c=1] [L552] free(list) [L553] list = next VAL [c=1] [L554] length-- VAL [c=1] [L556] COND FALSE !(length > 0) VAL [c=1] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [c=1] - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 90 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 153372.5ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 35.9ms, AutomataDifference: 85076.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 691 SDtfs, 2584 SDslu, 1784 SDs, 0 SdLazy, 2460 SolverSat, 207 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 49656.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 644 GetRequests, 457 SyntacticMatches, 23 SemanticMatches, 164 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 74661.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 158.9ms AutomataMinimizationTime, 15 MinimizatonAttempts, 354 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 252.1ms SsaConstructionTime, 1343.3ms SatisfiabilityAnalysisTime, 58294.1ms InterpolantComputationTime, 341 NumberOfCodeBlocks, 341 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 590 ConstructedInterpolants, 93 QuantifiedInterpolants, 9012 SizeOfPredicates, 216 NumberOfNonLiveVariables, 1856 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 38 InterpolantComputations, 26 PerfectInterpolantSequences, 12/72 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 02:31:43,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f31118ff-038c-4746-9f1e-e4701eb8193e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...