./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl --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 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:34:32,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:34:32,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:34:32,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:34:32,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:34:32,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:34:32,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:34:32,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:34:32,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:34:32,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:34:32,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:34:32,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:34:32,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:34:32,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:34:32,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:34:32,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:34:32,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:34:32,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:34:32,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:34:32,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:34:32,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:34:33,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:34:33,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:34:33,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:34:33,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:34:33,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:34:33,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:34:33,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:34:33,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:34:33,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:34:33,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:34:33,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:34:33,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:34:33,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:34:33,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:34:33,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:34:33,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:34:33,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:34:33,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:34:33,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:34:33,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:34:33,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 17:34:33,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:34:33,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:34:33,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:34:33,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:34:33,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:34:33,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:34:33,086 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:34:33,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:34:33,086 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:34:33,087 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:34:33,088 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:34:33,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:34:33,088 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:34:33,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:34:33,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:34:33,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:34:33,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:34:33,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:34:33,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:34:33,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:34:33,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:34:33,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:34:33,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:34:33,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:34:33,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:34:33,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:34:33,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:34:33,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:34:33,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:34:33,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:34:33,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:33,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:34:33,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:34:33,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:34:33,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:34:33,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:34:33,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:34:33,094 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_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2021-11-23 17:34:33,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:34:33,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:34:33,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:34:33,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:34:33,429 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:34:33,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 17:34:33,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/a4228064c/4a3b25cc45cc472eb1b72c2cab75a667/FLAG6108dc2f0 [2021-11-23 17:34:34,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:34:34,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 17:34:34,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/a4228064c/4a3b25cc45cc472eb1b72c2cab75a667/FLAG6108dc2f0 [2021-11-23 17:34:34,353 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/a4228064c/4a3b25cc45cc472eb1b72c2cab75a667 [2021-11-23 17:34:34,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:34:34,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:34:34,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:34,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:34:34,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:34:34,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:34,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fac5b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34, skipping insertion in model container [2021-11-23 17:34:34,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:34,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:34:34,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:34:34,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:34,843 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:34:34,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:34,958 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:34:34,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34 WrapperNode [2021-11-23 17:34:34,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:34,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:34,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:34:34,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:34:34,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:34,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,034 INFO L137 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2021-11-23 17:34:35,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:35,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:34:35,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:34:35,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:34:35,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:34:35,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:34:35,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:34:35,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:34:35,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:34" (1/1) ... [2021-11-23 17:34:35,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:35,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:34:35,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:34:35,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:34:35,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:34:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:34:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:34:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:34:35,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:35,277 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:35,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:35,525 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:35,561 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:34:35,566 INFO L158 Benchmark]: Toolchain (without parser) took 1207.13ms. Allocated memory is still 123.7MB. Free memory was 85.0MB in the beginning and 74.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:34:35,567 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 123.7MB. Free memory was 102.5MB in the beginning and 102.4MB in the end (delta: 22.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:35,568 INFO L158 Benchmark]: CACSL2BoogieTranslator took 598.14ms. Allocated memory is still 123.7MB. Free memory was 84.9MB in the beginning and 90.7MB in the end (delta: -5.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:34:35,569 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.46ms. Allocated memory is still 123.7MB. Free memory was 90.7MB in the beginning and 88.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:34:35,570 INFO L158 Benchmark]: Boogie Preprocessor took 49.46ms. Allocated memory is still 123.7MB. Free memory was 88.7MB in the beginning and 87.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:34:35,571 INFO L158 Benchmark]: RCFGBuilder took 477.94ms. Allocated memory is still 123.7MB. Free memory was 87.4MB in the beginning and 74.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:34:35,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 123.7MB. Free memory was 102.5MB in the beginning and 102.4MB in the end (delta: 22.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 598.14ms. Allocated memory is still 123.7MB. Free memory was 84.9MB in the beginning and 90.7MB in the end (delta: -5.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.46ms. Allocated memory is still 123.7MB. Free memory was 90.7MB in the beginning and 88.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.46ms. Allocated memory is still 123.7MB. Free memory was 88.7MB in the beginning and 87.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 477.94ms. Allocated memory is still 123.7MB. Free memory was 87.4MB in the beginning and 74.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:34:35,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl --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 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:34:38,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:34:38,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:34:38,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:34:38,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:34:38,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:34:38,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:34:38,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:34:38,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:34:38,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:34:38,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:34:38,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:34:38,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:34:38,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:34:38,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:34:38,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:34:38,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:34:38,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:34:38,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:34:38,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:34:38,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:34:38,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:34:38,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:34:38,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:34:38,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:34:38,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:34:38,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:34:38,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:34:38,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:34:38,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:34:38,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:34:38,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:34:38,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:34:38,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:34:38,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:34:38,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:34:38,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:34:38,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:34:38,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:34:38,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:34:38,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:34:38,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 17:34:38,596 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:34:38,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:34:38,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:34:38,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:34:38,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:34:38,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:34:38,599 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:34:38,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:34:38,600 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:34:38,600 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:34:38,601 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:34:38,602 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:34:38,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:34:38,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:34:38,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:34:38,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:34:38,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:34:38,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:34:38,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:34:38,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:34:38,605 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:34:38,605 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:34:38,606 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:34:38,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:34:38,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:34:38,606 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:34:38,606 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:34:38,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:34:38,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:34:38,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:34:38,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:34:38,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:34:38,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:38,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:34:38,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:34:38,609 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:34:38,609 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:38,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:34:38,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:34:38,610 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_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2021-11-23 17:34:39,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:34:39,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:34:39,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:34:39,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:34:39,123 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:34:39,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 17:34:39,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/7e77ced09/10cd67fa7f4346a2befd057cd940efdd/FLAGe9aa94b39 [2021-11-23 17:34:40,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:34:40,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 17:34:40,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/7e77ced09/10cd67fa7f4346a2befd057cd940efdd/FLAGe9aa94b39 [2021-11-23 17:34:40,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/data/7e77ced09/10cd67fa7f4346a2befd057cd940efdd [2021-11-23 17:34:40,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:34:40,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:34:40,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:40,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:34:40,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:34:40,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:40,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c8ae95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40, skipping insertion in model container [2021-11-23 17:34:40,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:40,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:34:40,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:34:40,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:40,783 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:34:40,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:40,907 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:34:40,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40 WrapperNode [2021-11-23 17:34:40,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:40,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:40,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:34:40,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:34:40,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:40,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,016 INFO L137 Inliner]: procedures = 118, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-23 17:34:41,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:41,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:34:41,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:34:41,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:34:41,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:34:41,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:34:41,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:34:41,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:34:41,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (1/1) ... [2021-11-23 17:34:41,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:41,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:34:41,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:34:41,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 17:34:41,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:34:41,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 17:34:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:34:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:34:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:41,296 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:41,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:41,663 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:41,672 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:34:41,672 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:34:41,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:41 BoogieIcfgContainer [2021-11-23 17:34:41,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:34:41,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:34:41,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:34:41,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:34:41,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:34:40" (1/3) ... [2021-11-23 17:34:41,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7dd8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:41, skipping insertion in model container [2021-11-23 17:34:41,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:40" (2/3) ... [2021-11-23 17:34:41,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7dd8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:41, skipping insertion in model container [2021-11-23 17:34:41,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:41" (3/3) ... [2021-11-23 17:34:41,698 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca-2.i [2021-11-23 17:34:41,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:34:41,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 17:34:41,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:34:41,764 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:34:41,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 17:34:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:34:41,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:41,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:41,806 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2021-11-23 17:34:41,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219348943] [2021-11-23 17:34:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:41,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:41,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:34:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:34:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:42,188 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 17:34:42,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 17:34:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:42,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:42,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219348943] [2021-11-23 17:34:42,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219348943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:42,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:42,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:42,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114000209] [2021-11-23 17:34:42,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:42,329 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2021-11-23 17:34:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:42,438 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-23 17:34:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 7 [2021-11-23 17:34:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:42,459 INFO L225 Difference]: With dead ends: 33 [2021-11-23 17:34:42,459 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 17:34:42,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:42,468 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:42,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 17:34:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 17:34:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-23 17:34:42,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 7 [2021-11-23 17:34:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:42,512 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-23 17:34:42,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2021-11-23 17:34:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-23 17:34:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:34:42,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:42,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:42,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:42,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:42,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2021-11-23 17:34:42,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645965028] [2021-11-23 17:34:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:42,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:42,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:42,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:34:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:34:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:42,860 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:42,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:42,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:42,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:42,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645965028] [2021-11-23 17:34:42,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645965028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:42,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:42,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:34:42,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444721657] [2021-11-23 17:34:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:42,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:42,925 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-11-23 17:34:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:43,108 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-23 17:34:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 7 [2021-11-23 17:34:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:43,111 INFO L225 Difference]: With dead ends: 58 [2021-11-23 17:34:43,111 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 17:34:43,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:43,113 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:43,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 70 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:34:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 17:34:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-11-23 17:34:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-23 17:34:43,122 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2021-11-23 17:34:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:43,122 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-23 17:34:43,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-11-23 17:34:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-23 17:34:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:34:43,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:43,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:43,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:43,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:43,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-11-23 17:34:43,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:43,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78304938] [2021-11-23 17:34:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:43,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:43,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:34:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:43,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:43,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:43,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78304938] [2021-11-23 17:34:43,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78304938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:43,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:43,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:43,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867458443] [2021-11-23 17:34:43,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:43,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:43,444 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-11-23 17:34:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:43,508 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-23 17:34:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 7 [2021-11-23 17:34:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:43,510 INFO L225 Difference]: With dead ends: 54 [2021-11-23 17:34:43,510 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 17:34:43,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:43,512 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:43,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 17:34:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-11-23 17:34:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-23 17:34:43,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2021-11-23 17:34:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-23 17:34:43,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-11-23 17:34:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-23 17:34:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:34:43,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:43,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:43,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:43,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:43,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876086, now seen corresponding path program 1 times [2021-11-23 17:34:43,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:43,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50818391] [2021-11-23 17:34:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:43,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:43,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:34:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:34:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:43,838 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:43,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:43,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:43,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50818391] [2021-11-23 17:34:43,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50818391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:43,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:43,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:43,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764305384] [2021-11-23 17:34:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:43,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:34:43,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:34:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:43,936 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-11-23 17:34:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:44,160 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-23 17:34:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:34:44,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 7 [2021-11-23 17:34:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:44,162 INFO L225 Difference]: With dead ends: 59 [2021-11-23 17:34:44,162 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 17:34:44,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:44,164 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 58 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:34:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 17:34:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-11-23 17:34:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-23 17:34:44,169 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 7 [2021-11-23 17:34:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:44,170 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-23 17:34:44,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-11-23 17:34:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-23 17:34:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:34:44,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:44,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:44,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:44,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:44,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash 629680341, now seen corresponding path program 1 times [2021-11-23 17:34:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189596099] [2021-11-23 17:34:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:44,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:44,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:44,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:44,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:34:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:34:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:44,562 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:44,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:44,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:44,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:44,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189596099] [2021-11-23 17:34:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189596099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:44,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:44,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:34:44,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396232552] [2021-11-23 17:34:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:44,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:34:44,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:34:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:44,689 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:45,018 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-11-23 17:34:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:34:45,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-23 17:34:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:45,021 INFO L225 Difference]: With dead ends: 68 [2021-11-23 17:34:45,021 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 17:34:45,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:34:45,023 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:45,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:34:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 17:34:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-11-23 17:34:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.5625) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-23 17:34:45,034 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 10 [2021-11-23 17:34:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:45,035 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-23 17:34:45,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-23 17:34:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:34:45,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:45,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:45,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:45,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:45,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:45,238 INFO L85 PathProgramCache]: Analyzing trace with hash 629680340, now seen corresponding path program 1 times [2021-11-23 17:34:45,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:45,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580171392] [2021-11-23 17:34:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:45,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:45,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:45,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:34:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:34:45,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:45,400 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 17:34:45,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 17:34:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:45,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:45,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580171392] [2021-11-23 17:34:45,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580171392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:45,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:45,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:45,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047030716] [2021-11-23 17:34:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:45,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:34:45,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:45,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:34:45,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:45,449 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:45,588 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-23 17:34:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:34:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-23 17:34:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:45,589 INFO L225 Difference]: With dead ends: 40 [2021-11-23 17:34:45,589 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 17:34:45,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:34:45,590 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:45,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 17:34:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 17:34:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.5) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-11-23 17:34:45,596 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 10 [2021-11-23 17:34:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:45,597 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-11-23 17:34:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-11-23 17:34:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:34:45,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:45,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:45,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:45,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:45,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash -179666285, now seen corresponding path program 1 times [2021-11-23 17:34:45,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:45,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087056070] [2021-11-23 17:34:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:45,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:45,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:34:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:34:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:45,975 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:45,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:46,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:46,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087056070] [2021-11-23 17:34:46,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087056070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:46,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:46,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:34:46,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706445450] [2021-11-23 17:34:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:46,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:34:46,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:34:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:46,085 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:46,324 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-23 17:34:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:34:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-23 17:34:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:46,333 INFO L225 Difference]: With dead ends: 50 [2021-11-23 17:34:46,333 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 17:34:46,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:34:46,334 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:46,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 64 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:34:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 17:34:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-11-23 17:34:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-23 17:34:46,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 10 [2021-11-23 17:34:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-23 17:34:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-23 17:34:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:34:46,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:46,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:46,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:46,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:46,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1954745921, now seen corresponding path program 1 times [2021-11-23 17:34:46,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:46,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637881813] [2021-11-23 17:34:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:46,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:46,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:46,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:34:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:34:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:46,715 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 17:34:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 17:34:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:46,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:46,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637881813] [2021-11-23 17:34:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637881813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:46,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:46,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:46,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964872757] [2021-11-23 17:34:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:46,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:34:46,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:34:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:46,816 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:46,930 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-23 17:34:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:34:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:34:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:46,932 INFO L225 Difference]: With dead ends: 37 [2021-11-23 17:34:46,932 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 17:34:46,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:34:46,933 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:46,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 17:34:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 17:34:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.5) internal successors, (45), 36 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) [2021-11-23 17:34:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-23 17:34:46,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 11 [2021-11-23 17:34:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:46,938 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-23 17:34:46,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-23 17:34:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:34:46,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:46,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:46,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:47,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:47,149 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1954745920, now seen corresponding path program 1 times [2021-11-23 17:34:47,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:47,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518909217] [2021-11-23 17:34:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:47,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:47,151 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:47,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:34:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:34:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:47,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:47,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:34:47,353 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 18 treesize of output 16 [2021-11-23 17:34:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:47,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:47,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:47,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518909217] [2021-11-23 17:34:47,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518909217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:47,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:47,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:34:47,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308673548] [2021-11-23 17:34:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:47,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:34:47,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:34:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:47,475 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:47,742 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-11-23 17:34:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:34:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:34:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:47,744 INFO L225 Difference]: With dead ends: 75 [2021-11-23 17:34:47,744 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 17:34:47,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:34:47,745 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:47,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 115 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:34:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 17:34:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2021-11-23 17:34:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-11-23 17:34:47,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 11 [2021-11-23 17:34:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-11-23 17:34:47,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-11-23 17:34:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:34:47,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:47,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:47,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:34:47,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:47,968 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1530874750, now seen corresponding path program 1 times [2021-11-23 17:34:47,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:47,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142227832] [2021-11-23 17:34:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:47,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:47,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:47,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:34:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:34:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:48,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:34:48,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:34:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:48,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:48,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142227832] [2021-11-23 17:34:48,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142227832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:48,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:48,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:34:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769091616] [2021-11-23 17:34:48,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:48,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:34:48,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:34:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:48,267 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:48,437 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-23 17:34:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:34:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:34:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:48,444 INFO L225 Difference]: With dead ends: 58 [2021-11-23 17:34:48,444 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 17:34:48,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:34:48,445 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:48,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 68 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 17:34:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-11-23 17:34:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-23 17:34:48,450 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 11 [2021-11-23 17:34:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:48,450 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-23 17:34:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-23 17:34:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:34:48,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:48,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:48,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:48,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:48,663 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025223, now seen corresponding path program 1 times [2021-11-23 17:34:48,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:48,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51485935] [2021-11-23 17:34:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:48,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:48,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:48,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:34:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:34:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:48,781 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:49,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:49,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51485935] [2021-11-23 17:34:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51485935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:49,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191137218] [2021-11-23 17:34:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:49,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:49,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:49,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:34:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:34:50,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:50,057 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:50,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191137218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783406251] [2021-11-23 17:34:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:50,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:50,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:34:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:34:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:50,680 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:50,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:51,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783406251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:51,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:51,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 12 [2021-11-23 17:34:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564776619] [2021-11-23 17:34:51,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:51,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 17:34:51,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 17:34:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:34:51,558 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:52,076 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-11-23 17:34:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:34:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:34:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:52,079 INFO L225 Difference]: With dead ends: 84 [2021-11-23 17:34:52,080 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 17:34:52,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:34:52,081 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:52,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 100 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:34:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 17:34:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2021-11-23 17:34:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-11-23 17:34:52,086 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 11 [2021-11-23 17:34:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:52,086 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-11-23 17:34:52,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-11-23 17:34:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:34:52,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:52,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:52,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:52,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:52,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:34:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:52,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -467610218, now seen corresponding path program 1 times [2021-11-23 17:34:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622857796] [2021-11-23 17:34:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:52,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:52,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:34:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:34:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:52,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:52,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:52,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622857796] [2021-11-23 17:34:52,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622857796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:52,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:52,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:52,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957548495] [2021-11-23 17:34:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:52,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:52,840 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-23 17:34:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:52,882 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-11-23 17:34:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-11-23 17:34:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:52,885 INFO L225 Difference]: With dead ends: 75 [2021-11-23 17:34:52,885 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 17:34:52,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:52,886 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:52,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:34:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 17:34:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-11-23 17:34:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.38) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-23 17:34:52,894 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 12 [2021-11-23 17:34:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-23 17:34:52,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-23 17:34:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-23 17:34:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:34:52,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:52,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:52,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:53,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:53,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:53,110 INFO L85 PathProgramCache]: Analyzing trace with hash 212448152, now seen corresponding path program 1 times [2021-11-23 17:34:53,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:53,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205161472] [2021-11-23 17:34:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:53,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:53,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:53,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:34:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:34:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:53,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:53,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205161472] [2021-11-23 17:34:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205161472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:53,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:53,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:34:53,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374860898] [2021-11-23 17:34:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:53,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:53,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:53,233 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-23 17:34:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:53,277 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-11-23 17:34:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-11-23 17:34:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:53,280 INFO L225 Difference]: With dead ends: 56 [2021-11-23 17:34:53,280 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 17:34:53,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:53,281 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:53,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:34:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 17:34:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-11-23 17:34:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-11-23 17:34:53,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 12 [2021-11-23 17:34:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:53,286 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-11-23 17:34:53,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-23 17:34:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-11-23 17:34:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:34:53,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:53,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:53,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:53,488 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1625875758, now seen corresponding path program 1 times [2021-11-23 17:34:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184292874] [2021-11-23 17:34:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:53,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:53,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:53,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:34:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:53,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184292874] [2021-11-23 17:34:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184292874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [535934355] [2021-11-23 17:34:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:53,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:53,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:53,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:34:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:53,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:53,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [535934355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162054948] [2021-11-23 17:34:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:53,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:53,924 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:53,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:34:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:54,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:54,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162054948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:54,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 17:34:54,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130935872] [2021-11-23 17:34:54,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:54,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:34:54,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:34:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:34:54,113 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:54,190 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-11-23 17:34:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:34:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:34:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:54,192 INFO L225 Difference]: With dead ends: 75 [2021-11-23 17:34:54,192 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 17:34:54,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:34:54,193 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:54,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 153 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 17:34:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-11-23 17:34:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-11-23 17:34:54,198 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 14 [2021-11-23 17:34:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:54,198 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-11-23 17:34:54,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-11-23 17:34:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:34:54,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:54,206 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:54,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:54,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:54,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:54,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:54,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1968026960, now seen corresponding path program 1 times [2021-11-23 17:34:54,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:54,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488765106] [2021-11-23 17:34:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:54,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:54,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:54,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:34:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:34:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:54,974 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 12 treesize of output 8 [2021-11-23 17:34:55,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 17:34:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:55,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:55,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488765106] [2021-11-23 17:34:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488765106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:55,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:34:55,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223299803] [2021-11-23 17:34:55,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:34:55,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:34:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:34:55,075 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-23 17:34:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:55,284 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-23 17:34:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:34:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:34:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:55,286 INFO L225 Difference]: With dead ends: 82 [2021-11-23 17:34:55,286 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 17:34:55,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:34:55,288 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:55,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 175 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 17:34:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-11-23 17:34:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-23 17:34:55,293 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 14 [2021-11-23 17:34:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:55,294 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-23 17:34:55,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-23 17:34:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-23 17:34:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:34:55,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:55,296 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:55,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:55,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:55,507 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1709861522, now seen corresponding path program 1 times [2021-11-23 17:34:55,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:55,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454130435] [2021-11-23 17:34:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:55,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:55,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:55,510 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:55,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:34:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:34:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:55,654 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:34:55,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:34:55,711 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 [2021-11-23 17:34:55,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:34:55,891 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 21 treesize of output 21 [2021-11-23 17:34:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:56,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:57,182 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 14 [2021-11-23 17:34:57,190 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 29 treesize of output 27 [2021-11-23 17:34:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:57,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:57,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454130435] [2021-11-23 17:34:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454130435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:57,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2019861863] [2021-11-23 17:34:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:57,501 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:57,504 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:57,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 17:34:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:34:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:57,892 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 15 treesize of output 11 [2021-11-23 17:34:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:58,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:34:58,293 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 19 treesize of output 12 [2021-11-23 17:34:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:58,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2019861863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:58,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:34:58,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 24 [2021-11-23 17:34:58,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617750439] [2021-11-23 17:34:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:58,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:34:58,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:34:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:34:58,349 INFO L87 Difference]: Start difference. First operand 64 states and 77 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) [2021-11-23 17:34:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:58,545 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2021-11-23 17:34:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:34:58,545 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 14 [2021-11-23 17:34:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:58,546 INFO L225 Difference]: With dead ends: 76 [2021-11-23 17:34:58,546 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 17:34:58,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:34:58,547 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-23 17:34:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 17:34:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2021-11-23 17:34:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-23 17:34:58,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 14 [2021-11-23 17:34:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:58,551 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-23 17:34:58,552 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) [2021-11-23 17:34:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-23 17:34:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:34:58,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:58,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:58,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:58,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:58,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:58,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1138011067, now seen corresponding path program 1 times [2021-11-23 17:34:58,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:58,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735375045] [2021-11-23 17:34:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:58,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:58,955 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:58,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:34:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:34:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:59,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:59,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735375045] [2021-11-23 17:34:59,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735375045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:59,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:59,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:34:59,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32175705] [2021-11-23 17:34:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:59,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:34:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:34:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:34:59,090 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-11-23 17:34:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:59,177 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-11-23 17:34:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:34:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 [2021-11-23 17:34:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:59,179 INFO L225 Difference]: With dead ends: 79 [2021-11-23 17:34:59,179 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 17:34:59,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:34:59,180 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:59,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 159 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 17:34:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-11-23 17:34:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-11-23 17:34:59,186 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 15 [2021-11-23 17:34:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:59,186 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-11-23 17:34:59,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-11-23 17:34:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-11-23 17:34:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:34:59,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:59,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:59,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:59,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash -879845629, now seen corresponding path program 1 times [2021-11-23 17:34:59,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624491597] [2021-11-23 17:34:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:59,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:59,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:59,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:59,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:34:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:59,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:59,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624491597] [2021-11-23 17:34:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624491597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:59,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:59,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:34:59,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994566555] [2021-11-23 17:34:59,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:59,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:34:59,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:34:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:59,584 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2021-11-23 17:34:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:59,754 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-11-23 17:34:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:34:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 [2021-11-23 17:34:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:59,756 INFO L225 Difference]: With dead ends: 75 [2021-11-23 17:34:59,756 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 17:34:59,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:34:59,757 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:59,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 17:34:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-23 17:34:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-11-23 17:34:59,762 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 15 [2021-11-23 17:34:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:59,762 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-11-23 17:34:59,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2021-11-23 17:34:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-11-23 17:34:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:34:59,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:59,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:59,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:59,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:59,971 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:34:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:59,972 INFO L85 PathProgramCache]: Analyzing trace with hash -879845628, now seen corresponding path program 1 times [2021-11-23 17:34:59,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:59,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775089264] [2021-11-23 17:34:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:59,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:59,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:59,973 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:35:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:00,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:35:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:00,116 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 18 treesize of output 16 [2021-11-23 17:35:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:00,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:00,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775089264] [2021-11-23 17:35:00,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775089264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:00,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:00,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:35:00,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189883453] [2021-11-23 17:35:00,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:00,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:35:00,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:35:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:35:00,457 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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) [2021-11-23 17:35:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:01,094 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-23 17:35:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:35:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 [2021-11-23 17:35:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:01,097 INFO L225 Difference]: With dead ends: 88 [2021-11-23 17:35:01,097 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 17:35:01,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:35:01,098 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:01,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 95 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:35:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 17:35:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-11-23 17:35:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 76 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) [2021-11-23 17:35:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-11-23 17:35:01,103 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 15 [2021-11-23 17:35:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:01,103 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-11-23 17:35:01,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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) [2021-11-23 17:35:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-11-23 17:35:01,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:35:01,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:01,104 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:01,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:01,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:01,317 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash 761370353, now seen corresponding path program 1 times [2021-11-23 17:35:01,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:01,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071819470] [2021-11-23 17:35:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:01,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:01,319 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:01,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:35:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:01,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:35:01,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:01,465 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:01,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:02,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071819470] [2021-11-23 17:35:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071819470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [272576176] [2021-11-23 17:35:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:02,949 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:02,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:02,955 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:02,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:35:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:35:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:03,150 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:04,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [272576176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:04,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340148863] [2021-11-23 17:35:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:04,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:04,256 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:35:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:35:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:04,382 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:04,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340148863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:05,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 14 [2021-11-23 17:35:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686124780] [2021-11-23 17:35:05,029 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:35:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:35:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:35:05,030 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:08,627 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2021-11-23 17:35:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:35:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-11-23 17:35:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:08,631 INFO L225 Difference]: With dead ends: 214 [2021-11-23 17:35:08,631 INFO L226 Difference]: Without dead ends: 214 [2021-11-23 17:35:08,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:35:08,632 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 409 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:08,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 191 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 17:35:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-23 17:35:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 101. [2021-11-23 17:35:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 100 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) [2021-11-23 17:35:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-11-23 17:35:08,638 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 15 [2021-11-23 17:35:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-11-23 17:35:08,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-11-23 17:35:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 17:35:08,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:08,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:08,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:08,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:09,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-23 17:35:09,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:09,259 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1587978612, now seen corresponding path program 1 times [2021-11-23 17:35:09,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:09,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104133577] [2021-11-23 17:35:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:09,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:09,261 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:09,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:35:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:09,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:09,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104133577] [2021-11-23 17:35:09,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104133577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:09,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:35:09,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391348716] [2021-11-23 17:35:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:09,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:35:09,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:35:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:09,764 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:09,781 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2021-11-23 17:35:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:35:09,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 17:35:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:09,783 INFO L225 Difference]: With dead ends: 109 [2021-11-23 17:35:09,783 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 17:35:09,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:09,785 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:09,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-23 17:35:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 17:35:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-23 17:35:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-11-23 17:35:09,790 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 17 [2021-11-23 17:35:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:09,791 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-11-23 17:35:09,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-11-23 17:35:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:35:09,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:09,792 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:09,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-23 17:35:10,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:10,006 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 980027851, now seen corresponding path program 1 times [2021-11-23 17:35:10,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:10,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493437900] [2021-11-23 17:35:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:10,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:10,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:10,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:35:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:35:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:10,179 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:10,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:10,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:11,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493437900] [2021-11-23 17:35:11,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493437900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [214223556] [2021-11-23 17:35:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:11,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:11,041 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:11,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:35:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:35:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:11,228 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:12,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [214223556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:12,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373461549] [2021-11-23 17:35:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:12,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:12,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:12,572 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 17:35:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:35:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:12,682 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:12,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:12,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:13,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373461549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:13,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:13,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 8, 8, 8] total 22 [2021-11-23 17:35:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065186085] [2021-11-23 17:35:13,054 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:13,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 17:35:13,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 17:35:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:35:13,056 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 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) [2021-11-23 17:35:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:15,296 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2021-11-23 17:35:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 17:35:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 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) Word has length 18 [2021-11-23 17:35:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:15,300 INFO L225 Difference]: With dead ends: 166 [2021-11-23 17:35:15,301 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 17:35:15,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:35:15,302 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 465 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:15,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 236 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:35:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 17:35:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 97. [2021-11-23 17:35:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-11-23 17:35:15,307 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 18 [2021-11-23 17:35:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:15,308 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-11-23 17:35:15,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 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) [2021-11-23 17:35:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-11-23 17:35:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:35:15,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:15,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:15,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:15,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-23 17:35:15,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-23 17:35:15,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:15,921 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 358816956, now seen corresponding path program 1 times [2021-11-23 17:35:15,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674733660] [2021-11-23 17:35:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:15,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:15,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:15,922 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:15,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:35:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:16,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:35:16,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:16,039 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 18 treesize of output 16 [2021-11-23 17:35:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:16,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:18,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:18,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674733660] [2021-11-23 17:35:18,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674733660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572965971] [2021-11-23 17:35:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:18,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:18,327 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:18,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:35:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:35:18,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:18,562 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 18 treesize of output 16 [2021-11-23 17:35:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:18,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:19,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572965971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:19,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548519183] [2021-11-23 17:35:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:19,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:19,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:19,516 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:19,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:35:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:35:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:19,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:35:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:20,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:20,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548519183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:20,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:20,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 10, 10] total 24 [2021-11-23 17:35:20,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970800959] [2021-11-23 17:35:20,607 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:20,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:35:20,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:35:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:35:20,609 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 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) [2021-11-23 17:35:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:29,957 INFO L93 Difference]: Finished difference Result 182 states and 206 transitions. [2021-11-23 17:35:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 17:35:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 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 19 [2021-11-23 17:35:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:29,965 INFO L225 Difference]: With dead ends: 182 [2021-11-23 17:35:29,966 INFO L226 Difference]: Without dead ends: 182 [2021-11-23 17:35:29,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=633, Invalid=2559, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 17:35:29,969 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 334 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 259 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:35:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-23 17:35:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 114. [2021-11-23 17:35:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.3211009174311927) internal successors, (144), 113 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2021-11-23 17:35:29,977 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 19 [2021-11-23 17:35:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:29,982 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2021-11-23 17:35:29,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 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) [2021-11-23 17:35:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2021-11-23 17:35:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:35:29,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:29,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:29,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:30,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:30,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:30,587 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash 316092298, now seen corresponding path program 1 times [2021-11-23 17:35:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970873027] [2021-11-23 17:35:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:30,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:30,590 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:30,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:35:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:35:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:30,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:30,742 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 18 treesize of output 16 [2021-11-23 17:35:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:30,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:31,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:31,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:31,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970873027] [2021-11-23 17:35:31,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970873027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:31,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [464911470] [2021-11-23 17:35:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:31,498 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:31,499 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:31,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 17:35:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:35:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:31,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:31,687 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 18 treesize of output 16 [2021-11-23 17:35:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:32,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [464911470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:32,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067648064] [2021-11-23 17:35:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:32,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:32,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:32,747 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:32,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 17:35:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:35:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:32,856 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 18 treesize of output 16 [2021-11-23 17:35:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:33,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:33,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067648064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:33,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:33,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 6, 5, 5] total 22 [2021-11-23 17:35:33,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279848387] [2021-11-23 17:35:33,686 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:33,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 17:35:33,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 17:35:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:35:33,687 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:35,616 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2021-11-23 17:35:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:35:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 17:35:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:35,619 INFO L225 Difference]: With dead ends: 161 [2021-11-23 17:35:35,619 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 17:35:35,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:35:35,620 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 396 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:35,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 175 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 17:35:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 17:35:35,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-11-23 17:35:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3125) internal successors, (147), 116 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2021-11-23 17:35:35,625 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 19 [2021-11-23 17:35:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:35,625 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2021-11-23 17:35:35,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2021-11-23 17:35:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:35:35,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:35,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:35,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:35,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-23 17:35:36,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:36,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:36,236 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1497721590, now seen corresponding path program 1 times [2021-11-23 17:35:36,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:36,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974358986] [2021-11-23 17:35:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:36,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:36,237 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:36,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:35:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:35:36,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:36,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974358986] [2021-11-23 17:35:36,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974358986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:36,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:36,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:35:36,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988469884] [2021-11-23 17:35:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:36,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:35:36,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:35:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:36,730 INFO L87 Difference]: Start difference. First operand 117 states and 147 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) [2021-11-23 17:35:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:36,740 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-11-23 17:35:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:35:36,741 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 [2021-11-23 17:35:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:36,742 INFO L225 Difference]: With dead ends: 124 [2021-11-23 17:35:36,742 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 17:35:36,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:36,743 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:36,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 59 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-23 17:35:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 17:35:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2021-11-23 17:35:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2021-11-23 17:35:36,747 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 20 [2021-11-23 17:35:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:36,748 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2021-11-23 17:35:36,748 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) [2021-11-23 17:35:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2021-11-23 17:35:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 17:35:36,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:36,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:36,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:36,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:36,958 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1225663594, now seen corresponding path program 1 times [2021-11-23 17:35:36,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:36,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562494891] [2021-11-23 17:35:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:36,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:36,961 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:35:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:35:37,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:37,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562494891] [2021-11-23 17:35:37,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562494891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:37,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:37,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:35:37,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512705020] [2021-11-23 17:35:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:37,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:35:37,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:35:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:37,496 INFO L87 Difference]: Start difference. First operand 108 states and 126 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) [2021-11-23 17:35:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:37,507 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2021-11-23 17:35:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:35:37,507 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 21 [2021-11-23 17:35:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:37,508 INFO L225 Difference]: With dead ends: 127 [2021-11-23 17:35:37,508 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 17:35:37,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:37,509 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:37,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-23 17:35:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 17:35:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-23 17:35:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2021-11-23 17:35:37,513 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 21 [2021-11-23 17:35:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:37,513 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2021-11-23 17:35:37,514 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) [2021-11-23 17:35:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2021-11-23 17:35:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:35:37,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:37,515 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:37,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 17:35:37,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:37,726 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2137348900, now seen corresponding path program 2 times [2021-11-23 17:35:37,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142124831] [2021-11-23 17:35:37,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:37,728 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:37,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:35:37,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:35:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:37,882 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:35:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:35:37,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:35:38,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 17:35:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:35:38,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:38,283 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 21 treesize of output 21 [2021-11-23 17:35:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:38,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:39,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 17:35:39,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:39,824 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 42 [2021-11-23 17:35:39,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:35:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:40,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142124831] [2021-11-23 17:35:40,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142124831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901930433] [2021-11-23 17:35:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:40,318 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:40,320 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:35:40,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:35:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:40,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:35:41,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:35:41,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:35:41,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:41,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:41,627 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 19 treesize of output 12 [2021-11-23 17:35:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:41,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:41,924 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_468 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_468) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2021-11-23 17:35:41,939 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_468 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_468) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:35:41,951 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_468 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_468) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString~0#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 17:35:41,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:41,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:35:42,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:42,001 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 44 [2021-11-23 17:35:42,009 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 14 treesize of output 10 [2021-11-23 17:35:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 17:35:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901930433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984794694] [2021-11-23 17:35:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:43,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:43,262 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:43,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 17:35:43,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:35:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:43,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:35:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2021-11-23 17:35:43,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:35:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:35:44,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:44,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:44,117 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 19 treesize of output 12 [2021-11-23 17:35:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:44,208 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_487) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2021-11-23 17:35:44,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:35:44,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString~0#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 17:35:44,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:35:44,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:35:44,278 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 44 [2021-11-23 17:35:44,292 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 14 treesize of output 10 [2021-11-23 17:35:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 17:35:45,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984794694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:45,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:45,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13, 12, 13, 12] total 51 [2021-11-23 17:35:45,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168239771] [2021-11-23 17:35:45,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:45,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 17:35:45,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 17:35:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1787, Unknown=7, NotChecked=546, Total=2550 [2021-11-23 17:35:45,666 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 51 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) [2021-11-23 17:35:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:53,469 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2021-11-23 17:35:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:35:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 51 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 22 [2021-11-23 17:35:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:53,472 INFO L225 Difference]: With dead ends: 170 [2021-11-23 17:35:53,472 INFO L226 Difference]: Without dead ends: 170 [2021-11-23 17:35:53,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=597, Invalid=4530, Unknown=9, NotChecked=870, Total=6006 [2021-11-23 17:35:53,474 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:53,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 735 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 561 Invalid, 0 Unknown, 543 Unchecked, 1.4s Time] [2021-11-23 17:35:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-23 17:35:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2021-11-23 17:35:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-11-23 17:35:53,478 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 22 [2021-11-23 17:35:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:53,478 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-11-23 17:35:53,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 51 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) [2021-11-23 17:35:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-11-23 17:35:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 17:35:53,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:53,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:53,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:53,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-23 17:35:53,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-23 17:35:54,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:54,083 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:35:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1832754448, now seen corresponding path program 1 times [2021-11-23 17:35:54,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442118577] [2021-11-23 17:35:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:54,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:54,085 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:54,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:35:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:35:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:54,248 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 18 treesize of output 16 [2021-11-23 17:35:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:54,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:56,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:56,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442118577] [2021-11-23 17:35:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442118577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:56,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761466622] [2021-11-23 17:35:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:56,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:56,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:56,120 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:56,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 17:35:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:35:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:56,332 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 18 treesize of output 16 [2021-11-23 17:35:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:57,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:57,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761466622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149136790] [2021-11-23 17:35:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:57,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:57,674 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:57,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 17:35:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:35:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:35:57,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:35:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:58,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:35:58,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149136790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:58,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:58,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 9, 9, 9] total 29 [2021-11-23 17:35:58,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844129142] [2021-11-23 17:35:58,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:58,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:35:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:35:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:35:58,790 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:05,676 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2021-11-23 17:36:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 17:36:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 17:36:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:05,679 INFO L225 Difference]: With dead ends: 204 [2021-11-23 17:36:05,679 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 17:36:05,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=578, Invalid=2502, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 17:36:05,681 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 406 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:05,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 292 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 17:36:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 17:36:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 139. [2021-11-23 17:36:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 138 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-11-23 17:36:05,686 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 23 [2021-11-23 17:36:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:05,687 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-11-23 17:36:05,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-11-23 17:36:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 17:36:05,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:05,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:05,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 17:36:05,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-23 17:36:06,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-23 17:36:06,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:06,295 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:36:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1028570897, now seen corresponding path program 1 times [2021-11-23 17:36:06,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227763193] [2021-11-23 17:36:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:06,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:06,297 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:06,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:36:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:36:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:36:06,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:06,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227763193] [2021-11-23 17:36:06,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227763193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:06,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:06,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:06,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585819500] [2021-11-23 17:36:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:36:06,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:36:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:06,915 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:06,924 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-11-23 17:36:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:36:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 25 [2021-11-23 17:36:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:06,926 INFO L225 Difference]: With dead ends: 138 [2021-11-23 17:36:06,926 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 17:36:06,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:06,926 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:06,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-23 17:36:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 17:36:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2021-11-23 17:36:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.209090909090909) internal successors, (133), 113 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2021-11-23 17:36:06,930 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 25 [2021-11-23 17:36:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:06,930 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2021-11-23 17:36:06,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2021-11-23 17:36:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:36:06,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:06,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:06,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:07,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:07,141 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:36:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1913209900, now seen corresponding path program 2 times [2021-11-23 17:36:07,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:07,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140507662] [2021-11-23 17:36:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:07,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:07,142 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:07,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:36:07,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:07,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:36:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:07,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:36:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:36:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:07,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:36:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:10,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140507662] [2021-11-23 17:36:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140507662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042190141] [2021-11-23 17:36:10,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:10,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:10,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:10,515 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:10,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 17:36:10,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:10,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 17:36:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:10,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:36:10,811 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 18 treesize of output 16 [2021-11-23 17:36:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:11,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:13,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:36:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042190141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715510191] [2021-11-23 17:36:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:13,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:13,415 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:13,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 17:36:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-23 17:36:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:13,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:36:13,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:36:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:14,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:36:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:17,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715510191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:17,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 16, 15] total 51 [2021-11-23 17:36:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331776917] [2021-11-23 17:36:17,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 17:36:17,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 17:36:17,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2374, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 17:36:17,394 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 52 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) [2021-11-23 17:36:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:37,825 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2021-11-23 17:36:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 17:36:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 52 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) Word has length 27 [2021-11-23 17:36:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:37,828 INFO L225 Difference]: With dead ends: 180 [2021-11-23 17:36:37,828 INFO L226 Difference]: Without dead ends: 180 [2021-11-23 17:36:37,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1572, Invalid=9140, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 17:36:37,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 324 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:37,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 421 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:36:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-23 17:36:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2021-11-23 17:36:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2021-11-23 17:36:37,836 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 27 [2021-11-23 17:36:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:37,836 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2021-11-23 17:36:37,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 52 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) [2021-11-23 17:36:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2021-11-23 17:36:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:36:37,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:37,838 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:37,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-23 17:36:38,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-23 17:36:38,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:38,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:38,450 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:36:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash 941538618, now seen corresponding path program 2 times [2021-11-23 17:36:38,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:38,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768051960] [2021-11-23 17:36:38,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:38,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:38,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:38,452 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:38,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 17:36:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:36:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:38,566 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:36:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:36:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:39,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:42,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:42,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768051960] [2021-11-23 17:36:42,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768051960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:42,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987827136] [2021-11-23 17:36:42,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:42,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:42,146 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:42,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 17:36:42,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:36:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:42,324 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:36:42,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:36:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:42,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [987827136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403376958] [2021-11-23 17:36:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:47,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:47,065 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:47,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 17:36:47,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:36:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:47,184 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:36:47,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:36:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:47,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:49,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403376958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:49,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:49,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 11, 11, 10] total 32 [2021-11-23 17:36:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076483150] [2021-11-23 17:36:49,041 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:36:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:36:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:36:49,043 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 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) [2021-11-23 17:36:54,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:56,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:58,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:14,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:16,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:28,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:37:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:42,028 INFO L93 Difference]: Finished difference Result 911 states and 1029 transitions. [2021-11-23 17:37:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 17:37:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 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) Word has length 27 [2021-11-23 17:37:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:42,035 INFO L225 Difference]: With dead ends: 911 [2021-11-23 17:37:42,035 INFO L226 Difference]: Without dead ends: 911 [2021-11-23 17:37:42,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=887, Invalid=1975, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 17:37:42,037 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1492 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 84 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:42,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 436 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 704 Invalid, 5 Unknown, 0 Unchecked, 18.4s Time] [2021-11-23 17:37:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-23 17:37:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 197. [2021-11-23 17:37:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.160621761658031) internal successors, (224), 196 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 224 transitions. [2021-11-23 17:37:42,048 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 224 transitions. Word has length 27 [2021-11-23 17:37:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 224 transitions. [2021-11-23 17:37:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 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) [2021-11-23 17:37:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 224 transitions. [2021-11-23 17:37:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:37:42,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:42,050 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:42,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:42,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-23 17:37:42,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-23 17:37:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:42,655 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:37:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash 269887706, now seen corresponding path program 3 times [2021-11-23 17:37:42,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709368675] [2021-11-23 17:37:42,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:42,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:42,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:42,657 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:37:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:37:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:37:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:42,937 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:37:42,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:37:42,951 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 18 treesize of output 16 [2021-11-23 17:37:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 17:37:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:37:43,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:37:43,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:37:43,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 17:37:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:43,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:45,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 17:37:45,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:45,648 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 42 [2021-11-23 17:37:45,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:37:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:47,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:47,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709368675] [2021-11-23 17:37:47,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709368675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:47,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241446856] [2021-11-23 17:37:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:47,801 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:47,803 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:47,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 17:37:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:37:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:37:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:48,112 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 18 treesize of output 16 [2021-11-23 17:37:48,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:37:48,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 17:37:48,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:37:49,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:37:49,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:37:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:37:49,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:49,751 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 19 treesize of output 12 [2021-11-23 17:37:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:49,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:50,164 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2021-11-23 17:37:50,175 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:37:50,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_710 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_711 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_710) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:37:50,207 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv2 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:37:50,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset|))))) is different from false [2021-11-23 17:37:50,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:37:50,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:50,273 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 44 [2021-11-23 17:37:50,289 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 14 treesize of output 10 [2021-11-23 17:37:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-23 17:37:54,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [241446856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750947839] [2021-11-23 17:37:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:54,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:54,087 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:54,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 17:37:54,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:37:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:37:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:54,248 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 24 treesize of output 22 [2021-11-23 17:37:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:37:54,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 17:37:54,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:37:54,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:37:55,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:37:55,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 17:37:55,151 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 21 treesize of output 15 [2021-11-23 17:37:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:55,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:56,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:37:56,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:56,998 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 44 treesize of output 44 [2021-11-23 17:37:57,013 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 14 treesize of output 10 [2021-11-23 17:38:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750947839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:01,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:01,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17, 16, 17, 16] total 72 [2021-11-23 17:38:01,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18335110] [2021-11-23 17:38:01,329 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 17:38:01,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 17:38:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=4019, Unknown=24, NotChecked=670, Total=5112 [2021-11-23 17:38:01,332 INFO L87 Difference]: Start difference. First operand 197 states and 224 transitions. Second operand has 72 states, 72 states have (on average 1.7638888888888888) internal successors, (127), 72 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) [2021-11-23 17:38:14,013 WARN L227 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 56 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:38:22,960 WARN L227 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 68 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:38:23,026 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (bvadd (_ bv4294967295 32) |c_ULTIMATE.start_main_~length~0#1|))) (let ((.cse10 (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv2 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (.cse6 (bvslt (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 32)) .cse9)) (.cse12 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (.cse15 (bvadd |c_ULTIMATE.start_main_~nondetString~0#1.offset| |c_ULTIMATE.start_main_~length~0#1|)) (.cse14 (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|))) (let ((.cse5 (not (bvule .cse15 .cse14))) (.cse8 (not (bvule .cse12 .cse14))) (.cse1 (not .cse6)) (.cse7 (not (bvule (bvadd (_ bv4294967295 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset| |c_ULTIMATE.start_main_~length~0#1|) .cse15))) (.cse3 (not (bvule .cse10 .cse14))) (.cse4 (bvslt (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv2 32)) .cse9)) (.cse0 (and (= (_ bv3 32) |c_ULTIMATE.start_main_~length~0#1|) (not (= |c_ULTIMATE.start_main_~nondetArea~0#1.base| |c_ULTIMATE.start_main_~nondetString~0#1.base|)))) (.cse2 (let ((.cse13 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset|))) (and (bvule .cse12 .cse13) (bvule .cse13 .cse14))))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4) (or .cse0 .cse5 .cse6 .cse7 .cse8 (not (bvslt |c_ULTIMATE.start_main_~i~0#1| .cse9))) (not (bvslt |c_ULTIMATE.start_main_~length~0#1| (_ bv1 32))) (or .cse0 .cse5 .cse1 .cse7 .cse8 .cse4) (or .cse0 (not (bvule (bvadd |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString~0#1.offset| (_ bv1 32)) .cse10)) .cse1 .cse7 .cse3 .cse4) (or .cse0 .cse6 .cse2) (or (forall ((v_ArrVal_687 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 24) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_687) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv2 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) (_ bv0 32))) (let ((.cse11 (bvadd (_ bv4 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))) (and (bvule .cse11 (select |c_#length| |c_ULTIMATE.start_cstrncpy_~src~0#1.base|)) (bvule (bvadd (_ bv3 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) .cse11)))))))) is different from false [2021-11-23 17:38:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:26,413 INFO L93 Difference]: Finished difference Result 251 states and 281 transitions. [2021-11-23 17:38:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 17:38:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.7638888888888888) internal successors, (127), 72 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) Word has length 30 [2021-11-23 17:38:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:26,414 INFO L225 Difference]: With dead ends: 251 [2021-11-23 17:38:26,414 INFO L226 Difference]: Without dead ends: 251 [2021-11-23 17:38:26,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=723, Invalid=6082, Unknown=25, NotChecked=1002, Total=7832 [2021-11-23 17:38:26,417 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 136 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:26,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 662 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 539 Invalid, 0 Unknown, 537 Unchecked, 2.5s Time] [2021-11-23 17:38:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-23 17:38:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-11-23 17:38:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.1576354679802956) internal successors, (235), 206 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-11-23 17:38:26,424 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 30 [2021-11-23 17:38:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-11-23 17:38:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.7638888888888888) internal successors, (127), 72 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) [2021-11-23 17:38:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-11-23 17:38:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 17:38:26,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:26,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:26,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:26,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:26,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:27,029 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:38:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 769142912, now seen corresponding path program 1 times [2021-11-23 17:38:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298637096] [2021-11-23 17:38:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:27,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:27,031 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:27,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:38:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:38:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:38:27,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:38:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:38:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:31,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:31,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298637096] [2021-11-23 17:38:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298637096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:31,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430889471] [2021-11-23 17:38:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:31,068 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:31,069 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:31,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 17:38:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:38:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:31,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:38:31,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:38:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:33,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430889471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782157195] [2021-11-23 17:38:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:35,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:35,283 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:35,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 17:38:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:38:35,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:35,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:38:35,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:38:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:36,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:38:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782157195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:37,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:37,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13, 13, 13, 13] total 47 [2021-11-23 17:38:37,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795340233] [2021-11-23 17:38:37,019 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:37,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:38:37,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:37,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:38:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:38:37,021 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:03,878 INFO L93 Difference]: Finished difference Result 286 states and 311 transitions. [2021-11-23 17:39:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-23 17:39:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-23 17:39:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:03,880 INFO L225 Difference]: With dead ends: 286 [2021-11-23 17:39:03,880 INFO L226 Difference]: Without dead ends: 286 [2021-11-23 17:39:03,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1889, Invalid=10321, Unknown=0, NotChecked=0, Total=12210 [2021-11-23 17:39:03,884 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 542 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:03,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 267 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 17:39:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-23 17:39:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 207. [2021-11-23 17:39:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.1576354679802956) internal successors, (235), 206 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-11-23 17:39:03,891 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 31 [2021-11-23 17:39:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:03,891 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-11-23 17:39:03,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-11-23 17:39:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:39:03,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:03,893 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:03,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-11-23 17:39:04,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 17:39:04,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:04,496 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:39:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1709244048, now seen corresponding path program 4 times [2021-11-23 17:39:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032284828] [2021-11-23 17:39:04,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:04,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:04,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:04,498 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:04,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:39:04,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:39:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:04,779 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:39:04,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:39:04,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:39:05,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 17:39:05,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:39:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:39:05,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:39:05,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:05,696 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 21 treesize of output 21 [2021-11-23 17:39:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:06,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:08,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:08,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 17:39:08,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:08,769 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 42 [2021-11-23 17:39:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:39:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:39:09,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032284828] [2021-11-23 17:39:09,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032284828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568554044] [2021-11-23 17:39:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:09,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:09,533 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:09,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 17:39:09,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:39:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:39:11,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:39:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:39:12,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:39:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:39:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:39:12,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:12,809 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 19 treesize of output 12 [2021-11-23 17:39:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:12,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:13,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2021-11-23 17:39:13,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:39:13,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_852) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv1 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:39:13,339 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv2 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:39:13,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_851 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_851) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv2 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:39:13,365 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (bvadd (_ bv3 32) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|))))) is different from false [2021-11-23 17:39:13,373 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_853 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~nondetString~0#1.offset|))))) is different from false [2021-11-23 17:39:13,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:13,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:39:13,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:13,391 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 44 [2021-11-23 17:39:13,395 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 14 treesize of output 10 [2021-11-23 17:39:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-11-23 17:39:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568554044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165163032] [2021-11-23 17:39:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:15,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:15,915 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 17:39:16,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 17:39:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:16,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:39:16,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:39:16,093 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 18 treesize of output 16 [2021-11-23 17:39:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 17:39:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:39:19,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-23 17:39:19,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-23 17:39:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:39:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:39:19,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:19,834 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 19 treesize of output 12 [2021-11-23 17:39:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:19,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:19,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_882 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_882) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)))) is different from false [2021-11-23 17:39:22,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:22,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 17:39:22,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:22,076 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 44 [2021-11-23 17:39:22,088 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 14 treesize of output 10 [2021-11-23 17:39:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 17:39:30,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165163032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:30,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:39:30,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 20, 20, 22, 22] total 98 [2021-11-23 17:39:30,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596288704] [2021-11-23 17:39:30,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:39:30,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 17:39:30,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 17:39:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=7423, Unknown=46, NotChecked=1464, Total=9506 [2021-11-23 17:39:30,780 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand has 98 states, 98 states have (on average 1.8571428571428572) internal successors, (182), 98 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:02,260 INFO L93 Difference]: Finished difference Result 287 states and 319 transitions. [2021-11-23 17:40:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-23 17:40:02,262 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.8571428571428572) internal successors, (182), 98 states have internal predecessors, (182), 0 states have call successors, (0), 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 38 [2021-11-23 17:40:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:02,263 INFO L225 Difference]: With dead ends: 287 [2021-11-23 17:40:02,263 INFO L226 Difference]: Without dead ends: 287 [2021-11-23 17:40:02,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 159 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 7526 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=1871, Invalid=21322, Unknown=95, NotChecked=2472, Total=25760 [2021-11-23 17:40:02,265 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 271 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1357 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:02,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 726 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 846 Invalid, 0 Unknown, 1357 Unchecked, 2.4s Time] [2021-11-23 17:40:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-23 17:40:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 231. [2021-11-23 17:40:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.158590308370044) internal successors, (263), 230 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 263 transitions. [2021-11-23 17:40:02,271 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 263 transitions. Word has length 38 [2021-11-23 17:40:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:02,271 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 263 transitions. [2021-11-23 17:40:02,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.8571428571428572) internal successors, (182), 98 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 263 transitions. [2021-11-23 17:40:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 17:40:02,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:02,273 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:02,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:02,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-23 17:40:02,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2021-11-23 17:40:02,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:02,883 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:40:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1890434292, now seen corresponding path program 3 times [2021-11-23 17:40:02,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:02,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558501326] [2021-11-23 17:40:02,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:40:02,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:02,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:02,885 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:02,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:40:03,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:40:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-23 17:40:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:40:03,125 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 18 treesize of output 16 [2021-11-23 17:40:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:04,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:10,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:40:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:10,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558501326] [2021-11-23 17:40:10,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558501326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [494766271] [2021-11-23 17:40:10,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:40:10,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:10,832 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:10,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-23 17:40:11,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:40:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-23 17:40:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:11,478 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:40:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 17:40:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:16,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [494766271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:28,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106965794] [2021-11-23 17:40:28,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:40:28,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:28,806 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:28,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 17:40:29,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:40:29,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 17:40:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:40:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:40:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:32,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:44,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:40:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:44,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106965794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:44,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:44,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 25, 25, 24, 23] total 118 [2021-11-23 17:40:44,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086387092] [2021-11-23 17:40:44,494 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:44,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-23 17:40:44,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-23 17:40:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=12714, Unknown=0, NotChecked=0, Total=14042 [2021-11-23 17:40:44,496 INFO L87 Difference]: Start difference. First operand 231 states and 263 transitions. Second operand has 119 states, 118 states have (on average 1.8220338983050848) internal successors, (215), 119 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:25,421 INFO L93 Difference]: Finished difference Result 345 states and 376 transitions. [2021-11-23 17:41:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-23 17:41:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 1.8220338983050848) internal successors, (215), 119 states have internal predecessors, (215), 0 states have call successors, (0), 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 43 [2021-11-23 17:41:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:25,423 INFO L225 Difference]: With dead ends: 345 [2021-11-23 17:41:25,423 INFO L226 Difference]: Without dead ends: 345 [2021-11-23 17:41:25,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9801 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=3516, Invalid=32016, Unknown=0, NotChecked=0, Total=35532 [2021-11-23 17:41:25,427 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:25,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1091 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 558 Invalid, 0 Unknown, 69 Unchecked, 3.1s Time] [2021-11-23 17:41:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-23 17:41:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 286. [2021-11-23 17:41:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.1312056737588652) internal successors, (319), 285 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 319 transitions. [2021-11-23 17:41:25,434 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 319 transitions. Word has length 43 [2021-11-23 17:41:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:25,434 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 319 transitions. [2021-11-23 17:41:25,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 1.8220338983050848) internal successors, (215), 119 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 319 transitions. [2021-11-23 17:41:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 17:41:25,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:25,436 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:25,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:25,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:25,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:26,050 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:41:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1828223912, now seen corresponding path program 2 times [2021-11-23 17:41:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:26,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331990991] [2021-11-23 17:41:26,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:26,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:26,051 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 17:41:26,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 17:41:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:41:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:41:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 17:41:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:28,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:34,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:41:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:34,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331990991] [2021-11-23 17:41:34,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331990991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1327477669] [2021-11-23 17:41:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:34,247 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:34,248 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:34,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-23 17:41:34,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:34,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 17:41:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:41:34,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:41:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:41:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:41:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:48,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1327477669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679149993] [2021-11-23 17:41:48,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:48,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:48,377 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-23 17:41:48,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-23 17:41:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:41:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:41:48,527 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 18 treesize of output 16 [2021-11-23 17:41:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:41:53,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:42:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679149993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:00,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:42:00,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22, 21, 19, 19] total 98 [2021-11-23 17:42:00,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572825752] [2021-11-23 17:42:00,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:42:00,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 17:42:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 17:42:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=8922, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 17:42:00,772 INFO L87 Difference]: Start difference. First operand 286 states and 319 transitions. Second operand has 99 states, 98 states have (on average 2.2448979591836733) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:03,560 INFO L93 Difference]: Finished difference Result 401 states and 431 transitions. [2021-11-23 17:44:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-23 17:44:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.2448979591836733) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 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 43 [2021-11-23 17:44:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:03,562 INFO L225 Difference]: With dead ends: 401 [2021-11-23 17:44:03,563 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 17:44:03,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 141.8s TimeCoverageRelationStatistics Valid=5308, Invalid=39848, Unknown=0, NotChecked=0, Total=45156 [2021-11-23 17:44:03,565 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 891 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:03,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 763 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 17:44:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 17:44:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 290. [2021-11-23 17:44:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.132867132867133) internal successors, (324), 289 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 324 transitions. [2021-11-23 17:44:03,572 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 324 transitions. Word has length 43 [2021-11-23 17:44:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 324 transitions. [2021-11-23 17:44:03,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.2448979591836733) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 324 transitions. [2021-11-23 17:44:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 17:44:03,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:03,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:03,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:03,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-23 17:44:03,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2021-11-23 17:44:04,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:04,187 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:44:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -123087652, now seen corresponding path program 3 times [2021-11-23 17:44:04,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176293100] [2021-11-23 17:44:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:04,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:04,188 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:04,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 17:44:04,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:44:04,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:44:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:04,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:04,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:44:04,515 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 18 treesize of output 16 [2021-11-23 17:44:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:05,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:10,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176293100] [2021-11-23 17:44:10,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176293100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:10,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809155439] [2021-11-23 17:44:10,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:10,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:10,084 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:10,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-23 17:44:10,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:44:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 17:44:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:10,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:44:10,475 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 18 treesize of output 16 [2021-11-23 17:44:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:16,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:16,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [809155439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390358294] [2021-11-23 17:44:16,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:16,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:16,892 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:16,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-23 17:44:17,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:44:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 17:44:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:17,219 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 18 treesize of output 16 [2021-11-23 17:44:17,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:44:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:19,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390358294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:22,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 13, 13] total 57 [2021-11-23 17:44:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592630256] [2021-11-23 17:44:22,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 17:44:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 17:44:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 17:44:22,559 INFO L87 Difference]: Start difference. First operand 290 states and 324 transitions. Second operand has 58 states, 57 states have (on average 2.754385964912281) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:05,592 INFO L93 Difference]: Finished difference Result 463 states and 500 transitions. [2021-11-23 17:45:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-23 17:45:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.754385964912281) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 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 43 [2021-11-23 17:45:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:05,594 INFO L225 Difference]: With dead ends: 463 [2021-11-23 17:45:05,594 INFO L226 Difference]: Without dead ends: 463 [2021-11-23 17:45:05,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5590 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=3684, Invalid=17196, Unknown=0, NotChecked=0, Total=20880 [2021-11-23 17:45:05,595 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1316 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:05,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 481 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 17:45:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-23 17:45:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 300. [2021-11-23 17:45:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.152027027027027) internal successors, (341), 299 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 341 transitions. [2021-11-23 17:45:05,604 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 341 transitions. Word has length 43 [2021-11-23 17:45:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:05,604 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 341 transitions. [2021-11-23 17:45:05,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.754385964912281) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 341 transitions. [2021-11-23 17:45:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 17:45:05,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:05,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:05,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:05,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2021-11-23 17:45:06,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-23 17:45:06,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:06,219 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:45:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 570954152, now seen corresponding path program 2 times [2021-11-23 17:45:06,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046512586] [2021-11-23 17:45:06,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:45:06,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:06,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:06,221 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:06,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 17:45:06,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:45:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:45:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:06,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:06,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:06,466 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 18 treesize of output 16 [2021-11-23 17:45:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:45:07,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:45:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:45:08,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:08,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046512586] [2021-11-23 17:45:08,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046512586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:08,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204215925] [2021-11-23 17:45:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:45:08,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:08,745 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:08,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2021-11-23 17:45:09,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:45:09,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:45:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:09,058 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 18 treesize of output 16 [2021-11-23 17:45:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:09,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:45:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:45:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1204215925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581959657] [2021-11-23 17:45:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:45:12,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:45:12,032 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:45:12,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-23 17:45:12,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:45:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:45:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:12,178 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 18 treesize of output 16 [2021-11-23 17:45:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:45:13,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:45:14,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581959657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:14,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:45:14,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 12, 9, 9, 9] total 38 [2021-11-23 17:45:14,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761056553] [2021-11-23 17:45:14,050 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:45:14,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 17:45:14,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 17:45:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:45:14,051 INFO L87 Difference]: Start difference. First operand 300 states and 341 transitions. Second operand has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:23,430 INFO L93 Difference]: Finished difference Result 633 states and 674 transitions. [2021-11-23 17:45:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 17:45:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 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 43 [2021-11-23 17:45:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:23,433 INFO L225 Difference]: With dead ends: 633 [2021-11-23 17:45:23,433 INFO L226 Difference]: Without dead ends: 633 [2021-11-23 17:45:23,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1017, Invalid=3539, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 17:45:23,434 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 490 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:23,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 373 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 17:45:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-23 17:45:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 303. [2021-11-23 17:45:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 299 states have (on average 1.137123745819398) internal successors, (340), 302 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 340 transitions. [2021-11-23 17:45:23,442 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 340 transitions. Word has length 43 [2021-11-23 17:45:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 340 transitions. [2021-11-23 17:45:23,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 340 transitions. [2021-11-23 17:45:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:45:23,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:23,444 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:23,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:23,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:23,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-11-23 17:45:24,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:24,062 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 17:45:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1429858554, now seen corresponding path program 4 times [2021-11-23 17:45:24,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:24,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326303943] [2021-11-23 17:45:24,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:24,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:24,064 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:24,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-23 17:45:24,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:24,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 17:45:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:24,346 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 18 treesize of output 16 [2021-11-23 17:45:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:26,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:45:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:30,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326303943] [2021-11-23 17:45:30,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326303943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1964980985] [2021-11-23 17:45:30,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:30,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:30,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:30,940 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-11-23 17:45:31,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:31,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 17:45:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:31,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:31,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:45:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:45:35,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:44,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1964980985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052706075] [2021-11-23 17:45:44,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:44,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:45:44,182 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:45:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c299e37-6740-4dad-b025-9257cbb623ac/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-23 17:45:44,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-23 17:45:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:44,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 17:45:44,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:45:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:47,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052706075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:54,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:45:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 21, 20, 18, 18] total 92 [2021-11-23 17:45:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923662322] [2021-11-23 17:45:54,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:45:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 17:45:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 17:45:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=7868, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 17:45:54,109 INFO L87 Difference]: Start difference. First operand 303 states and 340 transitions. Second operand has 93 states, 92 states have (on average 2.4239130434782608) internal successors, (223), 93 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)