./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label56.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_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/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_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/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_fa076dfb-417e-40d8-a414-68c149295392/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 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:19,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:19,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:19,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:19,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:19,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:19,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:19,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:19,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:19,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:19,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:19,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:19,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:19,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:19,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:19,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:19,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:19,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:19,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:19,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:19,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:19,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:19,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:19,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:19,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:19,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:19,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:19,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:19,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:19,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:19,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:19,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:19,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:19,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:19,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:19,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:19,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:19,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:19,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:19,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:19,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:19,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:10:19,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:19,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:19,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:19,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:19,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:19,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:19,189 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:19,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:19,197 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:19,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:10:19,199 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:19,199 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:19,199 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:10:19,199 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:10:19,199 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:19,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:10:19,200 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:10:19,200 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:10:19,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:19,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:19,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:10:19,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:19,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:19,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:19,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:19,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:19,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:19,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:19,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:19,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:19,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:19,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:19,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:19,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:19,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:19,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:19,208 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:10:19,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:10:19,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:19,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:19,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:19,209 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_fa076dfb-417e-40d8-a414-68c149295392/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc [2021-11-23 17:10:19,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:19,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:19,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:19,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:19,534 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:19,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-11-23 17:10:19,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d78e80848/eb410a6327234326920f2bc86d9df99c/FLAG16488e839 [2021-11-23 17:10:20,508 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:20,509 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-11-23 17:10:20,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d78e80848/eb410a6327234326920f2bc86d9df99c/FLAG16488e839 [2021-11-23 17:10:21,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d78e80848/eb410a6327234326920f2bc86d9df99c [2021-11-23 17:10:21,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:21,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:21,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:21,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:21,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:21,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:21" (1/1) ... [2021-11-23 17:10:21,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c49b372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:21, skipping insertion in model container [2021-11-23 17:10:21,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:21" (1/1) ... [2021-11-23 17:10:21,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:21,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:21,660 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_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c[7559,7572] [2021-11-23 17:10:22,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:22,862 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:10:22,905 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_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c[7559,7572] [2021-11-23 17:10:23,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:23,677 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:10:23,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23 WrapperNode [2021-11-23 17:10:23,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:23,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:23,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:10:23,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:10:23,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:24,652 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 17:10:24,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:24,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:10:24,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:10:24,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:10:24,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:24,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:24,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:24,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:25,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:25,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:25,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:25,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:10:25,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:10:25,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:10:25,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:10:25,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:25,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:25,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:10:25,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:10:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:10:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:10:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:10:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:10:25,799 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:10:25,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:10:31,928 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:10:31,996 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:10:32,008 INFO L158 Benchmark]: Toolchain (without parser) took 10994.12ms. Allocated memory was 100.7MB in the beginning and 721.4MB in the end (delta: 620.8MB). Free memory was 72.7MB in the beginning and 421.1MB in the end (delta: -348.4MB). Peak memory consumption was 330.7MB. Max. memory is 16.1GB. [2021-11-23 17:10:32,009 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:10:32,011 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2661.58ms. Allocated memory was 100.7MB in the beginning and 180.4MB in the end (delta: 79.7MB). Free memory was 72.7MB in the beginning and 109.2MB in the end (delta: -36.5MB). Peak memory consumption was 98.8MB. Max. memory is 16.1GB. [2021-11-23 17:10:32,012 INFO L158 Benchmark]: Boogie Procedure Inliner took 974.10ms. Allocated memory was 180.4MB in the beginning and 360.7MB in the end (delta: 180.4MB). Free memory was 109.2MB in the beginning and 226.8MB in the end (delta: -117.6MB). Peak memory consumption was 111.7MB. Max. memory is 16.1GB. [2021-11-23 17:10:32,013 INFO L158 Benchmark]: Boogie Preprocessor took 931.78ms. Allocated memory is still 360.7MB. Free memory was 226.8MB in the beginning and 197.3MB in the end (delta: 29.5MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. [2021-11-23 17:10:32,014 INFO L158 Benchmark]: RCFGBuilder took 6416.76ms. Allocated memory was 360.7MB in the beginning and 721.4MB in the end (delta: 360.7MB). Free memory was 197.3MB in the beginning and 421.1MB in the end (delta: -223.8MB). Peak memory consumption was 198.9MB. Max. memory is 16.1GB. [2021-11-23 17:10:32,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2661.58ms. Allocated memory was 100.7MB in the beginning and 180.4MB in the end (delta: 79.7MB). Free memory was 72.7MB in the beginning and 109.2MB in the end (delta: -36.5MB). Peak memory consumption was 98.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 974.10ms. Allocated memory was 180.4MB in the beginning and 360.7MB in the end (delta: 180.4MB). Free memory was 109.2MB in the beginning and 226.8MB in the end (delta: -117.6MB). Peak memory consumption was 111.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 931.78ms. Allocated memory is still 360.7MB. Free memory was 226.8MB in the beginning and 197.3MB in the end (delta: 29.5MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. * RCFGBuilder took 6416.76ms. Allocated memory was 360.7MB in the beginning and 721.4MB in the end (delta: 360.7MB). Free memory was 197.3MB in the beginning and 421.1MB in the end (delta: -223.8MB). Peak memory consumption was 198.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:10:32,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/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_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/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_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/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_fa076dfb-417e-40d8-a414-68c149295392/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 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:34,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:34,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:34,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:34,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:34,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:34,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:34,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:34,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:34,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:34,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:34,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:34,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:34,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:34,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:34,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:34,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:34,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:34,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:34,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:34,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:34,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:34,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:34,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:34,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:34,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:34,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:34,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:34,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:34,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:34,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:34,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:34,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:34,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:34,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:34,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:34,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:34,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:34,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:34,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:34,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:34,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:10:34,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:34,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:34,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:34,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:34,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:34,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:34,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:34,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:34,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:34,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:34,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:34,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:34,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:34,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:34,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:34,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:34,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:34,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:34,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:34,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:10:34,854 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:10:34,854 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:10:34,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:34,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:34,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:34,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:34,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:34,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:10:34,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:34,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:34,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:34,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:34,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:34,858 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:10:34,858 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:34,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:34,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:34,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:34,859 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_fa076dfb-417e-40d8-a414-68c149295392/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc [2021-11-23 17:10:35,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:35,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:35,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:35,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:35,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:35,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-11-23 17:10:35,399 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d4b984e97/23378035a5e84fb8a25722ee52f39104/FLAG3a455248e [2021-11-23 17:10:36,307 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:36,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2021-11-23 17:10:36,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d4b984e97/23378035a5e84fb8a25722ee52f39104/FLAG3a455248e [2021-11-23 17:10:36,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/data/d4b984e97/23378035a5e84fb8a25722ee52f39104 [2021-11-23 17:10:36,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:36,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:36,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:36,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:36,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:36,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:36" (1/1) ... [2021-11-23 17:10:36,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb7c528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:36, skipping insertion in model container [2021-11-23 17:10:36,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:36" (1/1) ... [2021-11-23 17:10:36,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:37,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:37,420 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_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c[7559,7572] [2021-11-23 17:10:38,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:38,805 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:10:38,840 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_fa076dfb-417e-40d8-a414-68c149295392/sv-benchmarks/c/eca-rers2012/Problem13_label56.c[7559,7572] [2021-11-23 17:10:39,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:39,625 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:10:39,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39 WrapperNode [2021-11-23 17:10:39,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:39,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:39,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:10:39,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:10:39,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:39,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,084 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 17:10:40,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:40,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:10:40,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:10:40,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:10:40,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:10:40,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:10:40,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:10:40,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:10:40,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (1/1) ... [2021-11-23 17:10:40,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:40,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:10:40,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:10:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:10:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:10:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:10:40,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:10:40,765 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:10:40,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:11:35,090 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:11:35,117 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:11:35,118 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:11:35,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:11:35 BoogieIcfgContainer [2021-11-23 17:11:35,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:11:35,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:11:35,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:11:35,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:11:35,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:10:36" (1/3) ... [2021-11-23 17:11:35,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3399cf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:11:35, skipping insertion in model container [2021-11-23 17:11:35,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:39" (2/3) ... [2021-11-23 17:11:35,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3399cf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:11:35, skipping insertion in model container [2021-11-23 17:11:35,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:11:35" (3/3) ... [2021-11-23 17:11:35,132 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label56.c [2021-11-23 17:11:35,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:11:35,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:11:35,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:11:35,207 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:11:35,207 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:11:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 17:11:35,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:35,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:11:35,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2021-11-23 17:11:35,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:35,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177850157] [2021-11-23 17:11:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:35,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:35,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:35,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:11:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:11:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:35,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:35,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177850157] [2021-11-23 17:11:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177850157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:35,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:11:35,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:11:35,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170138922] [2021-11-23 17:11:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:35,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:11:35,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:11:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:11:35,860 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:36,791 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-11-23 17:12:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 17:12:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:36,830 INFO L225 Difference]: With dead ends: 3147 [2021-11-23 17:12:36,831 INFO L226 Difference]: Without dead ends: 1964 [2021-11-23 17:12:36,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:36,842 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1126 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:36,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 60.7s Time] [2021-11-23 17:12:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-23 17:12:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-11-23 17:12:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-11-23 17:12:37,001 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 53 [2021-11-23 17:12:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-11-23 17:12:37,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-11-23 17:12:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 17:12:37,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:37,014 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, 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] [2021-11-23 17:12:37,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:37,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:37,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1853532721, now seen corresponding path program 1 times [2021-11-23 17:12:37,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:37,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817556855] [2021-11-23 17:12:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:37,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:37,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:37,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:12:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:37,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:37,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:37,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817556855] [2021-11-23 17:12:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817556855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:37,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:37,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:12:37,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974977977] [2021-11-23 17:12:37,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:37,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:37,855 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:45,061 INFO L93 Difference]: Finished difference Result 5507 states and 9186 transitions. [2021-11-23 17:13:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:13:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-23 17:13:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:45,098 INFO L225 Difference]: With dead ends: 5507 [2021-11-23 17:13:45,099 INFO L226 Difference]: Without dead ends: 3558 [2021-11-23 17:13:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:45,104 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 778 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:45,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1174 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2683 Invalid, 0 Unknown, 0 Unchecked, 67.1s Time] [2021-11-23 17:13:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-11-23 17:13:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3548. [2021-11-23 17:13:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 1.435861291232027) internal successors, (5093), 3547 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 5093 transitions. [2021-11-23 17:13:45,215 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 5093 transitions. Word has length 124 [2021-11-23 17:13:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:45,216 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 5093 transitions. [2021-11-23 17:13:45,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 5093 transitions. [2021-11-23 17:13:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 17:13:45,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:45,226 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, 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] [2021-11-23 17:13:45,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:45,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:45,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1853884228, now seen corresponding path program 1 times [2021-11-23 17:13:45,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:45,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289154665] [2021-11-23 17:13:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:45,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:45,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:45,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:13:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:45,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:13:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:46,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:46,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289154665] [2021-11-23 17:13:46,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289154665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:46,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:46,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:13:46,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514026446] [2021-11-23 17:13:46,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:46,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:13:46,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:13:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:46,220 INFO L87 Difference]: Start difference. First operand 3548 states and 5093 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:41,256 INFO L93 Difference]: Finished difference Result 7886 states and 11084 transitions. [2021-11-23 17:14:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2021-11-23 17:14:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:41,298 INFO L225 Difference]: With dead ends: 7886 [2021-11-23 17:14:41,298 INFO L226 Difference]: Without dead ends: 4340 [2021-11-23 17:14:41,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:41,305 INFO L933 BasicCegarLoop]: 1042 mSDtfsCounter, 694 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:41,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 1178 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 54.9s Time] [2021-11-23 17:14:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-11-23 17:14:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 4335. [2021-11-23 17:14:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 1.3682510383017996) internal successors, (5930), 4334 states have internal predecessors, (5930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 5930 transitions. [2021-11-23 17:14:41,417 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 5930 transitions. Word has length 154 [2021-11-23 17:14:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:41,418 INFO L470 AbstractCegarLoop]: Abstraction has 4335 states and 5930 transitions. [2021-11-23 17:14:41,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 5930 transitions. [2021-11-23 17:14:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 17:14:41,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:41,427 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, 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] [2021-11-23 17:14:41,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:41,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:41,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1296033301, now seen corresponding path program 1 times [2021-11-23 17:14:41,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:41,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621628029] [2021-11-23 17:14:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:41,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:41,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:41,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:14:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:42,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:42,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621628029] [2021-11-23 17:14:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621628029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:42,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:42,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:14:42,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910346964] [2021-11-23 17:14:42,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:42,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:42,374 INFO L87 Difference]: Start difference. First operand 4335 states and 5930 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:45,429 INFO L93 Difference]: Finished difference Result 11084 states and 15563 transitions. [2021-11-23 17:15:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-11-23 17:15:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:45,474 INFO L225 Difference]: With dead ends: 11084 [2021-11-23 17:15:45,474 INFO L226 Difference]: Without dead ends: 6751 [2021-11-23 17:15:45,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:45,493 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 773 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:45,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1096 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 62.9s Time] [2021-11-23 17:15:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-11-23 17:15:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6727. [2021-11-23 17:15:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 1.2762414510853404) internal successors, (8584), 6726 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 8584 transitions. [2021-11-23 17:15:45,659 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 8584 transitions. Word has length 164 [2021-11-23 17:15:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:45,661 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 8584 transitions. [2021-11-23 17:15:45,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 8584 transitions. [2021-11-23 17:15:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-23 17:15:45,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:45,666 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:45,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:15:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:45,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1331290540, now seen corresponding path program 1 times [2021-11-23 17:15:45,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:45,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981035825] [2021-11-23 17:15:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:45,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:45,886 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:45,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:15:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 17:15:47,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:47,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981035825] [2021-11-23 17:15:47,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981035825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:47,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:47,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:47,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421996131] [2021-11-23 17:15:47,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:47,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:47,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:47,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:47,269 INFO L87 Difference]: Start difference. First operand 6727 states and 8584 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:40,556 INFO L93 Difference]: Finished difference Result 12665 states and 16364 transitions. [2021-11-23 17:16:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 245 [2021-11-23 17:16:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:40,598 INFO L225 Difference]: With dead ends: 12665 [2021-11-23 17:16:40,598 INFO L226 Difference]: Without dead ends: 6727 [2021-11-23 17:16:40,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:40,606 INFO L933 BasicCegarLoop]: 1088 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:40,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1217 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 53.1s Time] [2021-11-23 17:16:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-11-23 17:16:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6727. [2021-11-23 17:16:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 1.275498067201903) internal successors, (8579), 6726 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 8579 transitions. [2021-11-23 17:16:40,755 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 8579 transitions. Word has length 245 [2021-11-23 17:16:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:40,755 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 8579 transitions. [2021-11-23 17:16:40,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 8579 transitions. [2021-11-23 17:16:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 17:16:40,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:40,761 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:40,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:40,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1641605741, now seen corresponding path program 1 times [2021-11-23 17:16:40,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444680291] [2021-11-23 17:16:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:40,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:40,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:40,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:16:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:16:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:45,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:17:03,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444680291] [2021-11-23 17:17:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444680291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289887550] [2021-11-23 17:17:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:03,154 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:03,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:03,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:17:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:17:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:17:04,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:04,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289887550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:04,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:17:04,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-23 17:17:04,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961468669] [2021-11-23 17:17:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:04,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:17:04,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:17:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:17:04,649 INFO L87 Difference]: Start difference. First operand 6727 states and 8579 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:27,095 INFO L93 Difference]: Finished difference Result 14435 states and 19366 transitions. [2021-11-23 17:18:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 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 250 [2021-11-23 17:18:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:27,144 INFO L225 Difference]: With dead ends: 14435 [2021-11-23 17:18:27,144 INFO L226 Difference]: Without dead ends: 10881 [2021-11-23 17:18:27,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:18:27,149 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 1971 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2902 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 2902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:27,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1971 Valid, 331 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 2902 Invalid, 0 Unknown, 0 Unchecked, 82.2s Time] [2021-11-23 17:18:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-11-23 17:18:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9108. [2021-11-23 17:18:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 1.3061381355001647) internal successors, (11895), 9107 states have internal predecessors, (11895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 11895 transitions. [2021-11-23 17:18:27,334 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 11895 transitions. Word has length 250 [2021-11-23 17:18:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:27,336 INFO L470 AbstractCegarLoop]: Abstraction has 9108 states and 11895 transitions. [2021-11-23 17:18:27,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 11895 transitions. [2021-11-23 17:18:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 17:18:27,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:27,342 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:27,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:27,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 17:18:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:27,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1061989469, now seen corresponding path program 1 times [2021-11-23 17:18:27,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:27,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980431792] [2021-11-23 17:18:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:27,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:27,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:27,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:18:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:28,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:28,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:28,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980431792] [2021-11-23 17:18:28,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980431792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:28,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:28,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:28,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674530516] [2021-11-23 17:18:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:28,445 INFO L87 Difference]: Start difference. First operand 9108 states and 11895 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:37,535 INFO L93 Difference]: Finished difference Result 21415 states and 29010 transitions. [2021-11-23 17:19:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-11-23 17:19:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:37,576 INFO L225 Difference]: With dead ends: 21415 [2021-11-23 17:19:37,576 INFO L226 Difference]: Without dead ends: 13096 [2021-11-23 17:19:37,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:37,586 INFO L933 BasicCegarLoop]: 1919 mSDtfsCounter, 765 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:37,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 2064 Invalid, 3355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 68.9s Time] [2021-11-23 17:19:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13096 states. [2021-11-23 17:19:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13096 to 12277. [2021-11-23 17:19:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12277 states, 12276 states have (on average 1.260019550342131) internal successors, (15468), 12276 states have internal predecessors, (15468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12277 states to 12277 states and 15468 transitions. [2021-11-23 17:19:37,780 INFO L78 Accepts]: Start accepts. Automaton has 12277 states and 15468 transitions. Word has length 252 [2021-11-23 17:19:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:37,780 INFO L470 AbstractCegarLoop]: Abstraction has 12277 states and 15468 transitions. [2021-11-23 17:19:37,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 12277 states and 15468 transitions. [2021-11-23 17:19:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-23 17:19:37,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:37,788 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, 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, 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] [2021-11-23 17:19:37,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:38,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:38,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862670, now seen corresponding path program 1 times [2021-11-23 17:19:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750576885] [2021-11-23 17:19:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:38,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:38,006 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:19:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:19:38,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:19:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:20:00,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750576885] [2021-11-23 17:20:00,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750576885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358164640] [2021-11-23 17:20:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:00,870 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:00,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:20:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:01,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:01,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [358164640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:01,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:20:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:20:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999663925] [2021-11-23 17:20:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:01,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:20:01,657 INFO L87 Difference]: Start difference. First operand 12277 states and 15468 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:51,599 INFO L93 Difference]: Finished difference Result 23633 states and 29950 transitions. [2021-11-23 17:20:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 292 [2021-11-23 17:20:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:51,635 INFO L225 Difference]: With dead ends: 23633 [2021-11-23 17:20:51,635 INFO L226 Difference]: Without dead ends: 12145 [2021-11-23 17:20:51,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:20:51,647 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 1018 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:51,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1646 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 49.7s Time] [2021-11-23 17:20:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12145 states. [2021-11-23 17:20:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12145 to 12143. [2021-11-23 17:20:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12143 states, 12142 states have (on average 1.1538461538461537) internal successors, (14010), 12142 states have internal predecessors, (14010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12143 states to 12143 states and 14010 transitions. [2021-11-23 17:20:51,892 INFO L78 Accepts]: Start accepts. Automaton has 12143 states and 14010 transitions. Word has length 292 [2021-11-23 17:20:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:51,893 INFO L470 AbstractCegarLoop]: Abstraction has 12143 states and 14010 transitions. [2021-11-23 17:20:51,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12143 states and 14010 transitions. [2021-11-23 17:20:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-23 17:20:51,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:51,899 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, 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, 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] [2021-11-23 17:20:51,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:52,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-23 17:20:52,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:52,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash 990536587, now seen corresponding path program 1 times [2021-11-23 17:20:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664940536] [2021-11-23 17:20:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:52,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:52,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:52,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:52,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:20:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:20:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:56,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:14,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664940536] [2021-11-23 17:21:14,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664940536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455125171] [2021-11-23 17:21:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:14,622 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:14,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:14,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:21:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:21:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 175 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:17,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 175 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455125171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893412721] [2021-11-23 17:21:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:20,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:20,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:20,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa076dfb-417e-40d8-a414-68c149295392/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:21:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:21:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 150 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 150 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893412721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:26,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:21:26,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 12 [2021-11-23 17:21:26,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155435400] [2021-11-23 17:21:26,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:21:26,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:21:26,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:26,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:21:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:21:26,369 INFO L87 Difference]: Start difference. First operand 12143 states and 14010 transitions. Second operand has 12 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:59,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:40,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:44,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:52,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:00,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:02,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:09,201 WARN L534 Checker$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 17:23:12,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []