./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/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_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:37:15,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:37:15,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:37:15,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:37:15,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:37:15,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:37:15,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:37:15,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:37:15,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:37:15,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:37:15,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:37:15,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:37:15,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:37:15,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:37:15,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:37:15,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:37:15,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:37:15,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:37:15,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:37:15,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:37:15,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:37:15,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:37:15,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:37:15,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:37:15,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:37:15,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:37:15,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:37:15,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:37:15,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:37:15,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:37:15,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:37:15,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:37:15,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:37:15,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:37:15,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:37:15,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:37:15,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:37:15,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:37:15,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:37:15,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:37:15,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:37:15,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:37:16,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:37:16,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:37:16,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:37:16,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:37:16,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:37:16,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:37:16,039 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:37:16,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:37:16,039 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:37:16,039 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:37:16,041 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:37:16,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:37:16,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:37:16,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:37:16,042 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:37:16,042 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:37:16,042 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:37:16,042 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:37:16,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:37:16,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:37:16,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:37:16,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:37:16,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:37:16,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:37:16,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:37:16,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:37:16,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:37:16,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:37:16,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:37:16,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:37:16,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:37:16,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:37:16,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:16,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:37:16,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:37:16,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:37:16,050 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:37:16,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:37:16,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:37:16,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:37:16,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:37:16,051 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_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2021-11-23 17:37:16,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:37:16,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:37:16,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:37:16,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:37:16,362 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:37:16,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 17:37:16,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/c16435c9b/9ba6767f42bb4212bb68361eb90ca9d5/FLAG768c801ff [2021-11-23 17:37:16,876 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:37:16,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 17:37:16,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/c16435c9b/9ba6767f42bb4212bb68361eb90ca9d5/FLAG768c801ff [2021-11-23 17:37:17,259 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/c16435c9b/9ba6767f42bb4212bb68361eb90ca9d5 [2021-11-23 17:37:17,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:37:17,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:37:17,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:17,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:37:17,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:37:17,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e863598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17, skipping insertion in model container [2021-11-23 17:37:17,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:37:17,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:37:17,475 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 17:37:17,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:17,504 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:37:17,519 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 17:37:17,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:17,541 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:37:17,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17 WrapperNode [2021-11-23 17:37:17,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:17,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:17,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:37:17,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:37:17,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,590 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-23 17:37:17,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:17,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:37:17,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:37:17,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:37:17,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:37:17,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:37:17,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:37:17,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:37:17,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:17" (1/1) ... [2021-11-23 17:37:17,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:17,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:37:17,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:37:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:37:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:37:17,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:37:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:37:17,810 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:37:17,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:37:17,955 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:37:17,975 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 17:37:17,991 INFO L158 Benchmark]: Toolchain (without parser) took 726.07ms. Allocated memory is still 119.5MB. Free memory was 82.9MB in the beginning and 80.5MB in the end (delta: 2.4MB). Peak memory consumption was 1.3MB. Max. memory is 16.1GB. [2021-11-23 17:37:17,992 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory was 90.0MB in the beginning and 89.9MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:37:17,994 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.32ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 94.1MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:37:17,997 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.17ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 92.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:37:17,998 INFO L158 Benchmark]: Boogie Preprocessor took 51.15ms. Allocated memory is still 119.5MB. Free memory was 92.5MB in the beginning and 91.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:37:18,000 INFO L158 Benchmark]: RCFGBuilder took 345.10ms. Allocated memory is still 119.5MB. Free memory was 91.5MB in the beginning and 80.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:37:18,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory was 90.0MB in the beginning and 89.9MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.32ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 94.1MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.17ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 92.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.15ms. Allocated memory is still 119.5MB. Free memory was 92.5MB in the beginning and 91.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 345.10ms. Allocated memory is still 119.5MB. Free memory was 91.5MB in the beginning and 80.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. 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 17:37:18,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/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_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/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_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:37:20,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:37:20,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:37:20,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:37:20,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:37:20,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:37:20,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:37:20,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:37:20,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:37:20,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:37:20,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:37:20,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:37:20,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:37:20,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:37:20,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:37:20,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:37:20,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:37:20,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:37:20,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:37:20,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:37:20,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:37:20,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:37:20,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:37:20,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:37:20,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:37:20,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:37:20,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:37:20,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:37:20,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:37:20,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:37:20,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:37:20,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:37:20,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:37:20,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:37:20,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:37:20,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:37:20,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:37:20,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:37:20,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:37:20,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:37:20,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:37:20,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:37:20,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:37:20,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:37:20,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:37:20,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:37:20,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:37:20,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:37:20,756 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:37:20,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:37:20,757 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:37:20,757 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:37:20,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:37:20,758 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:37:20,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:37:20,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:37:20,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:37:20,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:37:20,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:37:20,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:37:20,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:37:20,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:37:20,762 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:37:20,762 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:37:20,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:37:20,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:37:20,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:37:20,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:37:20,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:37:20,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:37:20,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:37:20,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:20,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:37:20,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:37:20,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:37:20,765 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:37:20,765 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:20,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:37:20,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:37:20,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:37:20,766 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_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2021-11-23 17:37:21,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:37:21,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:37:21,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:37:21,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:37:21,197 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:37:21,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 17:37:21,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/f7cf62128/cd51f7359da44dcea664fed5b547a357/FLAG80e10cc88 [2021-11-23 17:37:21,803 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:37:21,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-23 17:37:21,810 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/f7cf62128/cd51f7359da44dcea664fed5b547a357/FLAG80e10cc88 [2021-11-23 17:37:22,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/data/f7cf62128/cd51f7359da44dcea664fed5b547a357 [2021-11-23 17:37:22,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:37:22,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:37:22,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:22,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:37:22,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:37:22,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578f7e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22, skipping insertion in model container [2021-11-23 17:37:22,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:37:22,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:37:22,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 17:37:22,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:22,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:37:22,422 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-23 17:37:22,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:22,455 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:37:22,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22 WrapperNode [2021-11-23 17:37:22,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:22,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:22,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:37:22,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:37:22,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,516 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 17:37:22,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:22,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:37:22,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:37:22,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:37:22,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:37:22,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:37:22,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:37:22,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:37:22,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (1/1) ... [2021-11-23 17:37:22,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:22,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:37:22,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:37:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:37:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:37:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:37:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:37:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:37:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:37:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:37:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:37:22,762 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:37:22,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:37:23,021 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:37:23,026 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:37:23,027 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:37:23,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:37:23 BoogieIcfgContainer [2021-11-23 17:37:23,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:37:23,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:37:23,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:37:23,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:37:23,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:37:22" (1/3) ... [2021-11-23 17:37:23,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117eefa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:37:23, skipping insertion in model container [2021-11-23 17:37:23,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:22" (2/3) ... [2021-11-23 17:37:23,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117eefa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:37:23, skipping insertion in model container [2021-11-23 17:37:23,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:37:23" (3/3) ... [2021-11-23 17:37:23,050 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2021-11-23 17:37:23,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:37:23,057 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:37:23,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:37:23,148 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 17:37:23,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:37:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:37:23,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:23,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:23,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash 112467144, now seen corresponding path program 1 times [2021-11-23 17:37:23,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:23,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387147676] [2021-11-23 17:37:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:23,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:23,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:37:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:37:23,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:23,371 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 17:37:23,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:23,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387147676] [2021-11-23 17:37:23,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387147676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:23,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:23,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:37:23,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652128816] [2021-11-23 17:37:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:23,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:37:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:37:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:37:23,423 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 17:37:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:23,458 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2021-11-23 17:37:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:37:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 17:37:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:23,469 INFO L225 Difference]: With dead ends: 33 [2021-11-23 17:37:23,470 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 17:37:23,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:37:23,477 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:23,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:37:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 17:37:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 17:37:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-23 17:37:23,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2021-11-23 17:37:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:23,523 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-23 17:37:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 17:37:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-23 17:37:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:37:23,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:23,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:23,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:23,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:23,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1877798305, now seen corresponding path program 1 times [2021-11-23 17:37:23,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509295380] [2021-11-23 17:37:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:23,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:23,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:23,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:23,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:37:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:37:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:23,862 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 17:37:23,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:23,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:23,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509295380] [2021-11-23 17:37:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509295380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:23,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:23,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:37:23,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859917602] [2021-11-23 17:37:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:23,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:23,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:23,866 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:23,878 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-11-23 17:37:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:37:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:23,879 INFO L225 Difference]: With dead ends: 26 [2021-11-23 17:37:23,879 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 17:37:23,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 17:37:23,882 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:23,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:37:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 17:37:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 17:37:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-23 17:37:23,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-11-23 17:37:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:23,888 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-23 17:37:23,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-23 17:37:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:37:23,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:23,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:23,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:24,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1363852218, now seen corresponding path program 1 times [2021-11-23 17:37:24,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:24,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316265320] [2021-11-23 17:37:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:24,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:24,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:24,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:24,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:37:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:37:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:24,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:24,287 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 17:37:24,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316265320] [2021-11-23 17:37:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316265320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620749501] [2021-11-23 17:37:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:24,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:24,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:24,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:37:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:37:24,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:24,514 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 17:37:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:24,575 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 17:37:24,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [620749501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776539594] [2021-11-23 17:37:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:24,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:24,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:24,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:37:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:24,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:37:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:37:25,092 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 17:37:25,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:25,356 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 34 treesize of output 30 [2021-11-23 17:37:25,375 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 17:37:25,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2021-11-23 17:37:25,481 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 17:37:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776539594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:25,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:25,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 8, 8] total 17 [2021-11-23 17:37:25,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473314824] [2021-11-23 17:37:25,485 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:37:25,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:37:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:37:25,491 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 17:37:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:25,922 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-11-23 17:37:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:37:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 13 [2021-11-23 17:37:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:25,925 INFO L225 Difference]: With dead ends: 46 [2021-11-23 17:37:25,925 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 17:37:25,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:37:25,928 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 57 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:37:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 17:37:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-23 17:37:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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 17:37:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 17:37:25,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-23 17:37:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:25,938 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 17:37:25,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 17:37:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 17:37:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:37:25,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:25,939 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:25,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:37:26,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:37:26,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:26,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:26,545 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1148926733, now seen corresponding path program 1 times [2021-11-23 17:37:26,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:26,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815751850] [2021-11-23 17:37:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:26,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:26,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:26,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:37:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:37:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:26,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:26,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815751850] [2021-11-23 17:37:26,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815751850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1851669296] [2021-11-23 17:37:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:26,862 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:26,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:26,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:26,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:37:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:37:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:27,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:27,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1851669296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532178071] [2021-11-23 17:37:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:27,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:27,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:27,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:27,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:37:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:37:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:27,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:27,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532178071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:27,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:27,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 17:37:27,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279034151] [2021-11-23 17:37:27,269 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:27,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:37:27,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:37:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:37:27,271 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 17:37:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:27,494 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-11-23 17:37:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:37:27,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 19 [2021-11-23 17:37:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:27,498 INFO L225 Difference]: With dead ends: 41 [2021-11-23 17:37:27,498 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:37:27,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:37:27,500 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:27,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:37:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:37:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 17:37:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-23 17:37:27,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-11-23 17:37:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:27,508 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-23 17:37:27,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 17:37:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-23 17:37:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 17:37:27,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:27,512 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:27,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:27,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 17:37:27,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:28,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:28,114 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash 60416787, now seen corresponding path program 2 times [2021-11-23 17:37:28,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532269901] [2021-11-23 17:37:28,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:28,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:28,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:28,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:37:28,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:37:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:28,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:28,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532269901] [2021-11-23 17:37:28,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532269901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811402822] [2021-11-23 17:37:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:28,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:28,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:28,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:37:28,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:28,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:37:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:29,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:29,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811402822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:29,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779894358] [2021-11-23 17:37:29,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:29,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:29,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:29,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:29,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:37:29,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:37:29,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:29,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:37:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779894358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:29,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 17:37:29,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134476976] [2021-11-23 17:37:29,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:29,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:37:29,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:37:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:37:29,347 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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 17:37:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:30,539 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-11-23 17:37:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:37:30,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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 25 [2021-11-23 17:37:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:30,540 INFO L225 Difference]: With dead ends: 53 [2021-11-23 17:37:30,540 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 17:37:30,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:37:30,542 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:30,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:37:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 17:37:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 17:37:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-23 17:37:30,551 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-11-23 17:37:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-23 17:37:30,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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 17:37:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-23 17:37:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:37:30,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:30,553 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:30,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:30,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:30,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:31,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:31,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1151281325, now seen corresponding path program 3 times [2021-11-23 17:37:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190802502] [2021-11-23 17:37:31,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:31,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:31,166 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:31,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:37:31,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:37:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:37:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:31,583 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:37:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:37:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:31,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:31,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:31,847 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 82 treesize of output 78 [2021-11-23 17:37:31,900 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 17:37:31,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:37:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:32,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190802502] [2021-11-23 17:37:32,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190802502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:32,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542024212] [2021-11-23 17:37:32,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:32,019 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:32,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:32,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:37:32,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:37:32,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:37:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:32,239 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 17:37:32,593 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 17:37:32,663 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 15 treesize of output 15 [2021-11-23 17:37:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:32,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:33,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:33,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 268 treesize of output 219 [2021-11-23 17:37:33,950 INFO L354 Elim1Store]: treesize reduction 58, result has 45.8 percent of original size [2021-11-23 17:37:33,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 334 [2021-11-23 17:37:33,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:33,994 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 386 treesize of output 358 [2021-11-23 17:37:44,108 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-23 17:37:44,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:37:44,196 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-11-23 17:37:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 96 [2021-11-23 17:37:44,537 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 17:37:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:37:44,624 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-23 17:37:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 17:37:44,831 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 17:37:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:37:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 17:37:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542024212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562298084] [2021-11-23 17:37:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:37:48,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:48,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:48,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:37:48,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:37:48,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:37:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:48,493 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 17:37:48,867 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 15 treesize of output 15 [2021-11-23 17:37:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:49,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:49,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:37:49,073 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 82 treesize of output 78 [2021-11-23 17:37:49,119 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 17:37:49,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:37:49,186 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 17:37:49,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:37:49,276 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-23 17:37:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 75 [2021-11-23 17:37:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:51,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562298084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:51,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:51,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 6, 6] total 16 [2021-11-23 17:37:51,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648957714] [2021-11-23 17:37:51,115 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:51,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:37:51,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:37:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2021-11-23 17:37:51,117 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 17:37:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:51,289 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-23 17:37:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:37:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 17:37:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:51,291 INFO L225 Difference]: With dead ends: 49 [2021-11-23 17:37:51,291 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 17:37:51,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2021-11-23 17:37:51,292 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:51,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 17:37:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 17:37:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-11-23 17:37:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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 17:37:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-23 17:37:51,302 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2021-11-23 17:37:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:51,302 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-23 17:37:51,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 17:37:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-23 17:37:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 17:37:51,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:51,304 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:51,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:51,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 17:37:51,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:51,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash -480115011, now seen corresponding path program 1 times [2021-11-23 17:37:51,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665047967] [2021-11-23 17:37:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:51,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:51,910 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:51,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:37:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:52,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:37:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:37:52,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:37:53,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665047967] [2021-11-23 17:37:53,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665047967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [937548458] [2021-11-23 17:37:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:53,959 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:53,960 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:53,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:37:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:37:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:37:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:37:54,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [937548458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:54,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820644439] [2021-11-23 17:37:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:54,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:54,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:54,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:37:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:37:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:55,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:55,715 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 17:37:55,715 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 22 treesize of output 13 [2021-11-23 17:37:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 17:37:55,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820644439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:55,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:55,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 9, 9] total 61 [2021-11-23 17:37:55,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141259991] [2021-11-23 17:37:55,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 17:37:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 17:37:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=2994, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 17:37:55,923 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 61 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 61 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:05,984 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2021-11-23 17:38:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 17:38:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 61 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 17:38:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:05,999 INFO L225 Difference]: With dead ends: 106 [2021-11-23 17:38:05,999 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 17:38:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2502, Invalid=9930, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 17:38:06,007 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:06,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 205 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:38:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 17:38:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-11-23 17:38:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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 17:38:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-23 17:38:06,020 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 42 [2021-11-23 17:38:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:06,020 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-23 17:38:06,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 61 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-23 17:38:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:38:06,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:06,023 INFO L514 BasicCegarLoop]: trace histogram [46, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:06,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:06,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:06,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:06,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:06,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:06,636 INFO L85 PathProgramCache]: Analyzing trace with hash 946617359, now seen corresponding path program 2 times [2021-11-23 17:38:06,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:06,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164447969] [2021-11-23 17:38:06,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:38:06,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:06,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:38:06,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:38:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:38:06,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:07,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:13,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164447969] [2021-11-23 17:38:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164447969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [153302276] [2021-11-23 17:38:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:38:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:13,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:13,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:38:14,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:38:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:38:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:14,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [153302276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788610422] [2021-11-23 17:38:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:38:14,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:14,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:14,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:38:14,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:38:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:38:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:14,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:38:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788610422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:15,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:15,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 49, 49, 49] total 96 [2021-11-23 17:38:15,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841834829] [2021-11-23 17:38:15,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 17:38:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 17:38:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 17:38:15,228 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 17:39:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:15,510 INFO L93 Difference]: Finished difference Result 139 states and 192 transitions. [2021-11-23 17:39:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 17:39:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 0 states have call successors, (0), 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 69 [2021-11-23 17:39:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:15,513 INFO L225 Difference]: With dead ends: 139 [2021-11-23 17:39:15,513 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 17:39:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 64.6s TimeCoverageRelationStatistics Valid=6814, Invalid=13208, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 17:39:15,521 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:15,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 674 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:39:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 17:39:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-23 17:39:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 17:39:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2021-11-23 17:39:15,544 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 69 [2021-11-23 17:39:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2021-11-23 17:39:15,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 17:39:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2021-11-23 17:39:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:39:15,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:15,548 INFO L514 BasicCegarLoop]: trace histogram [94, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:15,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:15,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:15,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:16,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:16,171 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash 841501967, now seen corresponding path program 3 times [2021-11-23 17:39:16,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:16,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064695704] [2021-11-23 17:39:16,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:39:16,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:16,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:16,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:16,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:39:16,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:39:16,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:39:16,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:16,376 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 17:39:17,606 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 19 [2021-11-23 17:39:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:17,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:18,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:18,148 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 92 treesize of output 88 [2021-11-23 17:39:18,225 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-23 17:39:18,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-11-23 17:39:18,316 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 17:39:18,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2021-11-23 17:39:18,324 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 76 treesize of output 68 [2021-11-23 17:39:20,242 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-23 17:39:20,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 40 [2021-11-23 17:39:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:20,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2021-11-23 17:39:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:20,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2021-11-23 17:39:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:25,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:25,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064695704] [2021-11-23 17:39:25,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064695704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113786372] [2021-11-23 17:39:25,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:39:25,887 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:25,888 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:25,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:39:26,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:39:26,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:39:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:26,135 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 17:39:27,291 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 19 [2021-11-23 17:39:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:27,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:29,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:29,669 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 92 treesize of output 88 [2021-11-23 17:39:29,704 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-11-23 17:39:29,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-23 17:39:29,798 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 17:39:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:39:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 14 [2021-11-23 17:39:29,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:29,940 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-23 17:39:29,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 63 [2021-11-23 17:39:31,091 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-23 17:39:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 40 [2021-11-23 17:39:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2021-11-23 17:39:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:36,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [113786372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372561256] [2021-11-23 17:39:36,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:39:36,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:36,205 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:36,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:39:36,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:39:36,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:39:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:36,386 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 17:39:37,482 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 19 [2021-11-23 17:39:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:37,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:37,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:39:37,998 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 92 treesize of output 88 [2021-11-23 17:39:38,108 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-11-23 17:39:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2021-11-23 17:39:38,204 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 17:39:38,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:39:38,291 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 17:39:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:39:38,398 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-23 17:39:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-11-23 17:39:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:38,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 45 [2021-11-23 17:39:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:39:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372561256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:43,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:39:43,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9, 9, 9] total 17 [2021-11-23 17:39:43,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978300045] [2021-11-23 17:39:43,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:39:43,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:39:43,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:39:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2021-11-23 17:39:43,578 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:44,001 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-11-23 17:39:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:39:44,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:39:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:44,004 INFO L225 Difference]: With dead ends: 129 [2021-11-23 17:39:44,004 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 17:39:44,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 680 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=110, Invalid=351, Unknown=1, NotChecked=0, Total=462 [2021-11-23 17:39:44,009 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:44,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 63 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:39:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 17:39:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2021-11-23 17:39:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 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 17:39:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2021-11-23 17:39:44,027 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 117 [2021-11-23 17:39:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:44,028 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2021-11-23 17:39:44,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2021-11-23 17:39:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 17:39:44,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:44,031 INFO L514 BasicCegarLoop]: trace histogram [94, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:44,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:44,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:44,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:44,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:44,634 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2026555009, now seen corresponding path program 4 times [2021-11-23 17:39:44,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:44,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634027936] [2021-11-23 17:39:44,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:44,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:44,637 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:44,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:39:44,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:44,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:44,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 17:39:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 17:39:48,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 17:40:14,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634027936] [2021-11-23 17:40:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634027936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:14,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362589049] [2021-11-23 17:40:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:40:14,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:14,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:14,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:40:15,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:40:15,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 17:40:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 17:40:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 17:40:16,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362589049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170281439] [2021-11-23 17:40:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:40:16,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:16,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:16,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:40:16,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:40:16,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:40:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 2 proven. 207 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-11-23 17:40:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:22,919 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-23 17:40:22,919 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 22 treesize of output 13 [2021-11-23 17:40:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4487 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-23 17:40:23,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170281439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:23,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:23,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97, 97, 13, 11] total 211 [2021-11-23 17:40:23,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824878319] [2021-11-23 17:40:23,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2021-11-23 17:40:23,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2021-11-23 17:40:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9665, Invalid=34645, Unknown=0, NotChecked=0, Total=44310 [2021-11-23 17:40:23,989 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 211 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:50:31,967 INFO L93 Difference]: Finished difference Result 271 states and 375 transitions. [2021-11-23 17:50:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-11-23 17:50:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-23 17:50:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:50:31,969 INFO L225 Difference]: With dead ends: 271 [2021-11-23 17:50:31,969 INFO L226 Difference]: Without dead ends: 230 [2021-11-23 17:50:31,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21787 ImplicationChecksByTransitivity, 632.5s TimeCoverageRelationStatistics Valid=37443, Invalid=126177, Unknown=0, NotChecked=0, Total=163620 [2021-11-23 17:50:31,984 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 12853 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 13068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 12853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:50:31,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 763 Invalid, 13068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 12853 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 17:50:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-23 17:50:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2021-11-23 17:50:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0180995475113122) internal successors, (225), 221 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 17:50:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2021-11-23 17:50:32,012 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 122 [2021-11-23 17:50:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:50:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2021-11-23 17:50:32,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2021-11-23 17:50:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 17:50:32,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:50:32,018 INFO L514 BasicCegarLoop]: trace histogram [190, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:50:32,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:32,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:32,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:50:32,628 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:50:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:50:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1193485907, now seen corresponding path program 5 times [2021-11-23 17:50:32,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:50:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642626274] [2021-11-23 17:50:32,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:50:32,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:50:32,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:50:32,633 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:50:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3da5abb-2cd4-4ca2-a4b0-cca2fc636a21/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:51:00,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2021-11-23 17:51:00,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:51:00,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 197 conjunts are in the unsatisfiable core [2021-11-23 17:51:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates...