./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c --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_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/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_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/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_1da28917-b64f-4733-b9c1-34fabb135bb8/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 d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:06,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:06,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:06,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:06,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:06,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:06,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:06,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:06,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:06,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:06,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:06,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:06,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:06,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:06,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:06,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:06,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:06,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:06,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:06,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:06,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:06,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:06,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:06,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:06,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:06,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:06,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:06,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:06,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:06,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:06,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:06,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:06,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:06,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:06,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:06,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:06,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:06,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:06,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:06,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:06,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:06,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:07,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:07,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:07,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:07,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:07,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:07,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:07,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:07,020 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:07,020 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:07,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:07,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:07,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:07,021 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:07,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:07,021 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:07,021 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:07,022 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:07,022 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:07,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:07,023 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:07,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:07,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:07,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:07,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:07,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:07,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:07,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:07,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:07,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:07,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:07,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:07,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:07,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:07,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:07,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:07,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:07,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:07,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:07,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:07,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:07,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:07,028 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_1da28917-b64f-4733-b9c1-34fabb135bb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a [2021-11-23 16:45:07,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:07,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:07,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:07,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:07,324 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:07,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-23 16:45:07,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/52bedc36d/1f07d8106ef644f7894927cc232f4173/FLAG999e14db9 [2021-11-23 16:45:08,235 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:08,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-23 16:45:08,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/52bedc36d/1f07d8106ef644f7894927cc232f4173/FLAG999e14db9 [2021-11-23 16:45:08,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/52bedc36d/1f07d8106ef644f7894927cc232f4173 [2021-11-23 16:45:08,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:08,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:08,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:08,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:08,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:08,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:08" (1/1) ... [2021-11-23 16:45:08,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157c0d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:08, skipping insertion in model container [2021-11-23 16:45:08,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:08" (1/1) ... [2021-11-23 16:45:08,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:08,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:09,153 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_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-23 16:45:10,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:10,329 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:10,374 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_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-23 16:45:11,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:11,033 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:11,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11 WrapperNode [2021-11-23 16:45:11,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:11,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:11,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:11,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:11,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,465 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-23 16:45:11,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:11,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:11,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:11,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:11,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:11,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:12,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:12,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:12,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:12,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:12,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:12,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:11" (1/1) ... [2021-11-23 16:45:12,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:12,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:12,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:12,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:12,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:12,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:16,797 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:16,859 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 16:45:16,865 INFO L158 Benchmark]: Toolchain (without parser) took 8106.24ms. Allocated memory was 92.3MB in the beginning and 482.3MB in the end (delta: 390.1MB). Free memory was 57.2MB in the beginning and 249.1MB in the end (delta: -191.9MB). Peak memory consumption was 201.5MB. Max. memory is 16.1GB. [2021-11-23 16:45:16,867 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 67.4MB in the beginning and 67.4MB in the end (delta: 20.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:16,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2299.62ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 57.0MB in the beginning and 67.8MB in the end (delta: -10.8MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. [2021-11-23 16:45:16,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 407.43ms. Allocated memory was 121.6MB in the beginning and 172.0MB in the end (delta: 50.3MB). Free memory was 67.8MB in the beginning and 66.3MB in the end (delta: 1.5MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:16,871 INFO L158 Benchmark]: Boogie Preprocessor took 740.12ms. Allocated memory is still 172.0MB. Free memory was 66.3MB in the beginning and 62.9MB in the end (delta: 3.5MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2021-11-23 16:45:16,872 INFO L158 Benchmark]: RCFGBuilder took 4653.99ms. Allocated memory was 172.0MB in the beginning and 482.3MB in the end (delta: 310.4MB). Free memory was 62.9MB in the beginning and 249.1MB in the end (delta: -186.2MB). Peak memory consumption was 126.3MB. Max. memory is 16.1GB. [2021-11-23 16:45:16,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 67.4MB in the beginning and 67.4MB in the end (delta: 20.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2299.62ms. Allocated memory was 92.3MB in the beginning and 121.6MB in the end (delta: 29.4MB). Free memory was 57.0MB in the beginning and 67.8MB in the end (delta: -10.8MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 407.43ms. Allocated memory was 121.6MB in the beginning and 172.0MB in the end (delta: 50.3MB). Free memory was 67.8MB in the beginning and 66.3MB in the end (delta: 1.5MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 740.12ms. Allocated memory is still 172.0MB. Free memory was 66.3MB in the beginning and 62.9MB in the end (delta: 3.5MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. * RCFGBuilder took 4653.99ms. Allocated memory was 172.0MB in the beginning and 482.3MB in the end (delta: 310.4MB). Free memory was 62.9MB in the beginning and 249.1MB in the end (delta: -186.2MB). Peak memory consumption was 126.3MB. 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 16:45:16,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/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_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/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_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/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_1da28917-b64f-4733-b9c1-34fabb135bb8/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 d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:19,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:19,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:19,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:19,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:19,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:19,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:19,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:19,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:19,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:19,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:19,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:19,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:19,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:19,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:19,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:19,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:19,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:19,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:19,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:19,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:19,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:19,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:19,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:19,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:19,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:19,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:19,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:19,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:19,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:19,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:19,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:19,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:19,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:19,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:19,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:19,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:19,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:19,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:19,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:19,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:19,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:19,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:19,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:19,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:19,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:19,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:19,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:19,582 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:19,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:19,582 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:19,582 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:19,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:19,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:19,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:19,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:19,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:19,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:19,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:19,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:19,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:19,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:19,586 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:19,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:19,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:19,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:19,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:19,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:19,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:19,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:19,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:19,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:19,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:19,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:19,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:19,589 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:19,589 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:19,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:19,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:19,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:19,590 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_1da28917-b64f-4733-b9c1-34fabb135bb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a [2021-11-23 16:45:19,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:19,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:20,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:20,002 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:20,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:20,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-23 16:45:20,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/6860c045a/f21c07288cdb4d8cb141d52748ddac4a/FLAGee97a0627 [2021-11-23 16:45:20,940 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:20,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-23 16:45:20,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/6860c045a/f21c07288cdb4d8cb141d52748ddac4a/FLAGee97a0627 [2021-11-23 16:45:21,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/data/6860c045a/f21c07288cdb4d8cb141d52748ddac4a [2021-11-23 16:45:21,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:21,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:21,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:21,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:21,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:21,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35c5513d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:21, skipping insertion in model container [2021-11-23 16:45:21,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:21,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:21,863 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_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-23 16:45:23,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:23,033 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:23,072 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_1da28917-b64f-4733-b9c1-34fabb135bb8/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-23 16:45:23,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:23,705 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:23,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23 WrapperNode [2021-11-23 16:45:23,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:23,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:23,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:23,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:23,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:23,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:23,969 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4752 [2021-11-23 16:45:23,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:23,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:23,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:23,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:23,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:23,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:24,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:24,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:24,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:24,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (1/1) ... [2021-11-23 16:45:24,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:24,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:24,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:24,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:24,451 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:24,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:49,195 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:49,221 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:49,221 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:49,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:49 BoogieIcfgContainer [2021-11-23 16:45:49,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:49,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:49,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:49,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:49,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:21" (1/3) ... [2021-11-23 16:45:49,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51902ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:49, skipping insertion in model container [2021-11-23 16:45:49,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:23" (2/3) ... [2021-11-23 16:45:49,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51902ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:49, skipping insertion in model container [2021-11-23 16:45:49,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:49" (3/3) ... [2021-11-23 16:45:49,235 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label17.c [2021-11-23 16:45:49,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:49,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:49,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:49,309 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 16:45:49,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 16:45:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 16:45:49,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:49,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:49,358 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2102454322, now seen corresponding path program 1 times [2021-11-23 16:45:49,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:49,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481476997] [2021-11-23 16:45:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:49,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:49,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:49,776 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 16:45:49,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:49,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481476997] [2021-11-23 16:45:49,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481476997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:49,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:49,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:49,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365823168] [2021-11-23 16:45:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:49,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:49,890 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:46:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:22,648 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-23 16:46:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 16:46:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:22,686 INFO L225 Difference]: With dead ends: 2388 [2021-11-23 16:46:22,686 INFO L226 Difference]: Without dead ends: 1506 [2021-11-23 16:46:22,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 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 16:46:22,696 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 794 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:22,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 32.5s Time] [2021-11-23 16:46:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-23 16:46:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-23 16:46:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 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 16:46:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-11-23 16:46:22,831 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 40 [2021-11-23 16:46:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-11-23 16:46:22,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 16:46:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-11-23 16:46:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:46:22,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:22,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:22,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:23,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:23,054 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2055292671, now seen corresponding path program 1 times [2021-11-23 16:46:23,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270893035] [2021-11-23 16:46:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:23,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:23,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:23,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:46:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:46:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:24,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:25,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270893035] [2021-11-23 16:46:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270893035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744366557] [2021-11-23 16:46:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:25,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:25,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:25,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 16:46:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:46:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:26,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744366557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:26,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:46:26,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-23 16:46:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007338835] [2021-11-23 16:46:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:46:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:46:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:26,281 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 16:46:46,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:48,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:52,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:03,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:13,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:51,634 INFO L93 Difference]: Finished difference Result 4549 states and 7839 transitions. [2021-11-23 16:47:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:47:51,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-23 16:47:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:51,656 INFO L225 Difference]: With dead ends: 4549 [2021-11-23 16:47:51,656 INFO L226 Difference]: Without dead ends: 3045 [2021-11-23 16:47:51,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:47:51,660 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1484 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 1954 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1954 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:51,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 37 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1954 Valid, 4448 Invalid, 1 Unknown, 0 Unchecked, 85.1s Time] [2021-11-23 16:47:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-11-23 16:47:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 3008. [2021-11-23 16:47:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.5749916860658464) internal successors, (4736), 3007 states have internal predecessors, (4736), 0 states have call successors, (0), 0 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 16:47:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4736 transitions. [2021-11-23 16:47:51,801 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4736 transitions. Word has length 111 [2021-11-23 16:47:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:51,805 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4736 transitions. [2021-11-23 16:47:51,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 16:47:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4736 transitions. [2021-11-23 16:47:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 16:47:51,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:51,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:51,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:52,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:52,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:52,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1688599734, now seen corresponding path program 1 times [2021-11-23 16:47:52,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670231853] [2021-11-23 16:47:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:52,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:52,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:47:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:52,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:52,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670231853] [2021-11-23 16:47:52,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670231853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:52,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:52,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:52,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616490464] [2021-11-23 16:47:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:52,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:52,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:52,786 INFO L87 Difference]: Start difference. First operand 3008 states and 4736 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:27,329 INFO L93 Difference]: Finished difference Result 8267 states and 12767 transitions. [2021-11-23 16:48:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 16:48:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:27,360 INFO L225 Difference]: With dead ends: 8267 [2021-11-23 16:48:27,360 INFO L226 Difference]: Without dead ends: 5261 [2021-11-23 16:48:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 16:48:27,366 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 706 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:27,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 547 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 34.4s Time] [2021-11-23 16:48:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-11-23 16:48:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-11-23 16:48:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.4051330798479087) internal successors, (7391), 5260 states have internal predecessors, (7391), 0 states have call successors, (0), 0 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 16:48:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7391 transitions. [2021-11-23 16:48:27,496 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7391 transitions. Word has length 133 [2021-11-23 16:48:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:27,497 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7391 transitions. [2021-11-23 16:48:27,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7391 transitions. [2021-11-23 16:48:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 16:48:27,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:27,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:27,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:27,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:27,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 121581989, now seen corresponding path program 1 times [2021-11-23 16:48:27,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676483467] [2021-11-23 16:48:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:27,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:27,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:48:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:48:28,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:28,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:28,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676483467] [2021-11-23 16:48:28,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676483467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:28,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:28,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:48:28,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868589462] [2021-11-23 16:48:28,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:28,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:28,459 INFO L87 Difference]: Start difference. First operand 5261 states and 7391 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 16:49:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:09,519 INFO L93 Difference]: Finished difference Result 15026 states and 20732 transitions. [2021-11-23 16:49:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 208 [2021-11-23 16:49:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:09,578 INFO L225 Difference]: With dead ends: 15026 [2021-11-23 16:49:09,579 INFO L226 Difference]: Without dead ends: 9767 [2021-11-23 16:49:09,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 206 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 16:49:09,587 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:09,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 680 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 40.9s Time] [2021-11-23 16:49:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-23 16:49:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-23 16:49:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255068605365554) internal successors, (12257), 9766 states have internal predecessors, (12257), 0 states have call successors, (0), 0 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 16:49:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12257 transitions. [2021-11-23 16:49:09,806 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12257 transitions. Word has length 208 [2021-11-23 16:49:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:09,807 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12257 transitions. [2021-11-23 16:49:09,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 16:49:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12257 transitions. [2021-11-23 16:49:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 16:49:09,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:09,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:09,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 16:49:10,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:10,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1374436140, now seen corresponding path program 1 times [2021-11-23 16:49:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:10,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827261146] [2021-11-23 16:49:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:10,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:10,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:10,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:49:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:49:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:12,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:12,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827261146] [2021-11-23 16:49:12,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827261146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:12,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:12,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:12,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392144600] [2021-11-23 16:49:12,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:12,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:12,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:12,258 INFO L87 Difference]: Start difference. First operand 9767 states and 12257 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 16:49:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:42,078 INFO L93 Difference]: Finished difference Result 20323 states and 25327 transitions. [2021-11-23 16:49:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 214 [2021-11-23 16:49:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:42,125 INFO L225 Difference]: With dead ends: 20323 [2021-11-23 16:49:42,126 INFO L226 Difference]: Without dead ends: 10558 [2021-11-23 16:49:42,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:42,137 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1355 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:42,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1645 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 29.6s Time] [2021-11-23 16:49:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2021-11-23 16:49:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 10518. [2021-11-23 16:49:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 1.2374251212322906) internal successors, (13014), 10517 states have internal predecessors, (13014), 0 states have call successors, (0), 0 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 16:49:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 13014 transitions. [2021-11-23 16:49:42,388 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 13014 transitions. Word has length 214 [2021-11-23 16:49:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:42,389 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 13014 transitions. [2021-11-23 16:49:42,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 16:49:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 13014 transitions. [2021-11-23 16:49:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-23 16:49:42,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:42,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:42,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:42,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1837643239, now seen corresponding path program 1 times [2021-11-23 16:49:42,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:42,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432326261] [2021-11-23 16:49:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:42,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:42,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:42,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:49:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 37 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:44,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 37 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:45,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432326261] [2021-11-23 16:49:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432326261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574475028] [2021-11-23 16:49:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:45,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:45,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 16:49:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 224 proven. 68 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:47,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 224 proven. 68 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:48,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574475028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:48,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752340795] [2021-11-23 16:49:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:48,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:48,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:48,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 16:49:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:48,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:49:49,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:49,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752340795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:49,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:49:49,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 5, 5] total 11 [2021-11-23 16:49:49,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214251739] [2021-11-23 16:49:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:49,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:49,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:49:49,617 INFO L87 Difference]: Start difference. First operand 10518 states and 13014 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 16:50:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:26,293 INFO L93 Difference]: Finished difference Result 27793 states and 35174 transitions. [2021-11-23 16:50:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 281 [2021-11-23 16:50:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:26,332 INFO L225 Difference]: With dead ends: 27793 [2021-11-23 16:50:26,332 INFO L226 Difference]: Without dead ends: 18028 [2021-11-23 16:50:26,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1391 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:50:26,343 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 841 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:26,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 472 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 36.5s Time] [2021-11-23 16:50:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-11-23 16:50:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 17277. [2021-11-23 16:50:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.2119703635100718) internal successors, (20938), 17276 states have internal predecessors, (20938), 0 states have call successors, (0), 0 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 16:50:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20938 transitions. [2021-11-23 16:50:26,684 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20938 transitions. Word has length 281 [2021-11-23 16:50:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:26,684 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 20938 transitions. [2021-11-23 16:50:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 16:50:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20938 transitions. [2021-11-23 16:50:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-23 16:50:26,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:26,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:26,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:26,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:27,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:27,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:27,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 167397652, now seen corresponding path program 1 times [2021-11-23 16:50:27,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575138017] [2021-11-23 16:50:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:27,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:27,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:27,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:27,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:50:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:50:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-23 16:50:29,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:29,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575138017] [2021-11-23 16:50:29,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575138017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:29,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:29,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:29,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719582861] [2021-11-23 16:50:29,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:29,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:50:29,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:29,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:50:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:50:29,141 INFO L87 Difference]: Start difference. First operand 17277 states and 20938 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 16:50:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:57,477 INFO L93 Difference]: Finished difference Result 27076 states and 33678 transitions. [2021-11-23 16:50:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:50:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 302 [2021-11-23 16:50:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:57,537 INFO L225 Difference]: With dead ends: 27076 [2021-11-23 16:50:57,537 INFO L226 Difference]: Without dead ends: 10518 [2021-11-23 16:50:57,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:50:57,550 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 684 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:57,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 706 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time] [2021-11-23 16:50:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-11-23 16:50:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 10518. [2021-11-23 16:50:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 1.280212988494818) internal successors, (13464), 10517 states have internal predecessors, (13464), 0 states have call successors, (0), 0 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 16:50:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 13464 transitions. [2021-11-23 16:50:57,702 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 13464 transitions. Word has length 302 [2021-11-23 16:50:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:57,703 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 13464 transitions. [2021-11-23 16:50:57,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 16:50:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 13464 transitions. [2021-11-23 16:50:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-23 16:50:57,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:57,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:57,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 16:50:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:57,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash -977465073, now seen corresponding path program 1 times [2021-11-23 16:50:57,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612532186] [2021-11-23 16:50:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:57,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:57,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:50:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:50:59,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:51:00,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612532186] [2021-11-23 16:51:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612532186] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:51:00,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:51:00,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:51:00,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43283892] [2021-11-23 16:51:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:00,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:00,254 INFO L87 Difference]: Start difference. First operand 10518 states and 13464 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 16:52:09,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:33,469 INFO L93 Difference]: Finished difference Result 26291 states and 34285 transitions. [2021-11-23 16:52:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 353 [2021-11-23 16:52:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:33,523 INFO L225 Difference]: With dead ends: 26291 [2021-11-23 16:52:33,523 INFO L226 Difference]: Without dead ends: 16526 [2021-11-23 16:52:33,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:52:33,534 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 708 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:33,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 505 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 93.0s Time] [2021-11-23 16:52:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-11-23 16:52:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15024. [2021-11-23 16:52:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15024 states, 15023 states have (on average 1.2204619583305598) internal successors, (18335), 15023 states have internal predecessors, (18335), 0 states have call successors, (0), 0 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 16:52:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 18335 transitions. [2021-11-23 16:52:33,784 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 18335 transitions. Word has length 353 [2021-11-23 16:52:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 15024 states and 18335 transitions. [2021-11-23 16:52:33,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 16:52:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 18335 transitions. [2021-11-23 16:52:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-23 16:52:33,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:33,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:33,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:34,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:34,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash -556380614, now seen corresponding path program 1 times [2021-11-23 16:52:34,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:34,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198190254] [2021-11-23 16:52:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:34,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:34,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:34,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:52:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:34,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 16:52:34,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:34,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198190254] [2021-11-23 16:52:34,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198190254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:34,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:34,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:34,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301049237] [2021-11-23 16:52:34,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:34,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:34,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:34,995 INFO L87 Difference]: Start difference. First operand 15024 states and 18335 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 16:53:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:18,918 INFO L93 Difference]: Finished difference Result 36805 states and 45894 transitions. [2021-11-23 16:53:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 391 [2021-11-23 16:53:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:18,958 INFO L225 Difference]: With dead ends: 36805 [2021-11-23 16:53:18,959 INFO L226 Difference]: Without dead ends: 22534 [2021-11-23 16:53:19,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 389 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 16:53:19,020 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:19,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1387 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 43.7s Time] [2021-11-23 16:53:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-11-23 16:53:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-11-23 16:53:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.181067767274664) internal successors, (26613), 22533 states have internal predecessors, (26613), 0 states have call successors, (0), 0 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 16:53:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 26613 transitions. [2021-11-23 16:53:19,364 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 26613 transitions. Word has length 391 [2021-11-23 16:53:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:19,365 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 26613 transitions. [2021-11-23 16:53:19,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 16:53:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 26613 transitions. [2021-11-23 16:53:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-23 16:53:19,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:19,374 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:19,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 16:53:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:19,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 954608644, now seen corresponding path program 1 times [2021-11-23 16:53:19,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:19,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926818107] [2021-11-23 16:53:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:19,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:19,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:19,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:53:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:53:19,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 113 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:21,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 321 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:34,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926818107] [2021-11-23 16:53:34,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926818107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:34,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598757833] [2021-11-23 16:53:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:34,606 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:34,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:34,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 16:53:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:34,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-23 16:53:35,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:35,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598757833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:35,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:53:35,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 16:53:35,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281131017] [2021-11-23 16:53:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:35,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:35,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:53:35,559 INFO L87 Difference]: Start difference. First operand 22534 states and 26613 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 16:54:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:18,125 INFO L93 Difference]: Finished difference Result 49572 states and 59717 transitions. [2021-11-23 16:54:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 395 [2021-11-23 16:54:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:18,211 INFO L225 Difference]: With dead ends: 49572 [2021-11-23 16:54:18,211 INFO L226 Difference]: Without dead ends: 27791 [2021-11-23 16:54:18,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:18,223 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 671 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:18,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1369 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 42.3s Time] [2021-11-23 16:54:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2021-11-23 16:54:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 27791. [2021-11-23 16:54:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27791 states, 27790 states have (on average 1.1649514213745953) internal successors, (32374), 27790 states have internal predecessors, (32374), 0 states have call successors, (0), 0 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 16:54:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 32374 transitions. [2021-11-23 16:54:18,757 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 32374 transitions. Word has length 395 [2021-11-23 16:54:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:18,759 INFO L470 AbstractCegarLoop]: Abstraction has 27791 states and 32374 transitions. [2021-11-23 16:54:18,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 16:54:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 32374 transitions. [2021-11-23 16:54:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 16:54:18,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:18,773 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:18,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-23 16:54:19,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:19,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:19,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash 630321658, now seen corresponding path program 1 times [2021-11-23 16:54:19,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826868582] [2021-11-23 16:54:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:19,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:19,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:19,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:54:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:54:19,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 113 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:20,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 325 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:36,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:36,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826868582] [2021-11-23 16:54:36,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826868582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079638167] [2021-11-23 16:54:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:36,380 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:36,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:36,387 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:36,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 16:54:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:54:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-23 16:54:37,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:37,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1079638167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:37,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:54:37,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 16:54:37,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436889562] [2021-11-23 16:54:37,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:37,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:37,355 INFO L87 Difference]: Start difference. First operand 27791 states and 32374 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 16:55:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:21,872 INFO L93 Difference]: Finished difference Result 66094 states and 78250 transitions. [2021-11-23 16:55:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:55:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 399 [2021-11-23 16:55:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:21,916 INFO L225 Difference]: With dead ends: 66094 [2021-11-23 16:55:21,916 INFO L226 Difference]: Without dead ends: 39056 [2021-11-23 16:55:21,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:21,934 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 748 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:21,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1369 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 44.2s Time] [2021-11-23 16:55:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39056 states. [2021-11-23 16:55:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39056 to 36803. [2021-11-23 16:55:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36803 states, 36802 states have (on average 1.147872398239226) internal successors, (42244), 36802 states have internal predecessors, (42244), 0 states have call successors, (0), 0 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 16:55:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36803 states to 36803 states and 42244 transitions. [2021-11-23 16:55:22,650 INFO L78 Accepts]: Start accepts. Automaton has 36803 states and 42244 transitions. Word has length 399 [2021-11-23 16:55:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:22,652 INFO L470 AbstractCegarLoop]: Abstraction has 36803 states and 42244 transitions. [2021-11-23 16:55:22,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 16:55:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36803 states and 42244 transitions. [2021-11-23 16:55:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2021-11-23 16:55:22,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:22,997 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:55:23,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:23,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 16:55:23,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:23,398 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1188247578, now seen corresponding path program 1 times [2021-11-23 16:55:23,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73541432] [2021-11-23 16:55:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:23,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:23,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:55:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:24,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:55:24,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 443 proven. 253 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:55:26,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 627 proven. 69 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 16:55:42,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73541432] [2021-11-23 16:55:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73541432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [596946807] [2021-11-23 16:55:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:42,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:55:42,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:55:42,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:55:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:55:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 16:55:46,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [596946807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:46,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:55:46,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 16:55:46,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706028385] [2021-11-23 16:55:46,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:46,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:55:46,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:55:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:46,096 INFO L87 Difference]: Start difference. First operand 36803 states and 42244 transitions. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 16:56:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:23,608 INFO L93 Difference]: Finished difference Result 78110 states and 90019 transitions. [2021-11-23 16:56:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 1050 [2021-11-23 16:56:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:23,658 INFO L225 Difference]: With dead ends: 78110 [2021-11-23 16:56:23,659 INFO L226 Difference]: Without dead ends: 36803 [2021-11-23 16:56:23,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3147 GetRequests, 3141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:23,680 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:23,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1355 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 37.1s Time] [2021-11-23 16:56:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-11-23 16:56:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 36803. [2021-11-23 16:56:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36803 states, 36802 states have (on average 1.0644530188576709) internal successors, (39174), 36802 states have internal predecessors, (39174), 0 states have call successors, (0), 0 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 16:56:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36803 states to 36803 states and 39174 transitions. [2021-11-23 16:56:24,509 INFO L78 Accepts]: Start accepts. Automaton has 36803 states and 39174 transitions. Word has length 1050 [2021-11-23 16:56:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:24,510 INFO L470 AbstractCegarLoop]: Abstraction has 36803 states and 39174 transitions. [2021-11-23 16:56:24,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 16:56:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 36803 states and 39174 transitions. [2021-11-23 16:56:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2021-11-23 16:56:24,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:24,714 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:24,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:24,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 16:56:25,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:25,131 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2044369825, now seen corresponding path program 1 times [2021-11-23 16:56:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:25,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229326118] [2021-11-23 16:56:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:25,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:25,139 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:25,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da28917-b64f-4733-b9c1-34fabb135bb8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:56:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 151 proven. 329 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-23 16:56:29,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-23 16:56:33,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:33,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229326118] [2021-11-23 16:56:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229326118] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:56:33,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:56:33,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:56:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968994632] [2021-11-23 16:56:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:33,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:33,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:56:33,432 INFO L87 Difference]: Start difference. First operand 36803 states and 39174 transitions. Second operand has 3 states, 3 states have (on average 288.6666666666667) internal successors, (866), 3 states have internal predecessors, (866), 0 states have call successors, (0), 0 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 16:58:11,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:58:28,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []