./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label34.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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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 c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:23,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:23,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:23,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:23,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:23,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:23,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:23,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:23,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:23,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:23,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:23,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:23,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:23,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:23,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:23,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:23,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:23,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:23,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:23,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:23,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:23,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:23,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:23,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:23,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:23,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:23,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:23,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:23,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:23,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:23,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:23,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:23,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:23,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:23,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:23,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:23,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:23,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:23,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:23,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:23,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:23,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:41:23,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:23,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:23,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:23,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:23,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:23,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:23,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:23,321 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:23,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:23,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:41:23,323 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:23,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:23,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:41:23,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:41:23,324 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:23,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:41:23,325 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:41:23,325 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:41:23,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:23,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:23,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:41:23,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:23,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:23,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:23,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:23,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:23,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:23,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:23,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:23,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:23,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:23,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:23,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:23,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:23,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:23,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:23,331 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:41:23,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:41:23,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:23,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:23,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:23,333 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 [2021-11-23 17:41:23,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:23,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:23,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:23,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:23,726 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:23,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-23 17:41:23,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/4370cfd40/1674b8e1a0d4468cacd6da599d59285e/FLAG8a568c7b9 [2021-11-23 17:41:24,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:24,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-23 17:41:24,586 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/4370cfd40/1674b8e1a0d4468cacd6da599d59285e/FLAG8a568c7b9 [2021-11-23 17:41:24,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/4370cfd40/1674b8e1a0d4468cacd6da599d59285e [2021-11-23 17:41:24,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:24,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:24,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:24,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:24,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:24,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:24" (1/1) ... [2021-11-23 17:41:24,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d439444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:24, skipping insertion in model container [2021-11-23 17:41:24,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:24" (1/1) ... [2021-11-23 17:41:24,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:24,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:25,087 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-23 17:41:25,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:25,901 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:25,931 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-23 17:41:26,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:26,401 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:26,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26 WrapperNode [2021-11-23 17:41:26,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:26,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:26,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:26,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:26,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:26,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:26,863 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 17:41:26,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:26,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:26,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:26,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:26,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:26,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:26,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:26,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:27,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:27,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:27,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:27,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:27,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:27,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:27,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:27,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:26" (1/1) ... [2021-11-23 17:41:27,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:27,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:27,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:27,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:27,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:41:27,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:27,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:27,438 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:27,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:41:31,288 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:41:31,363 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 17:41:31,375 INFO L158 Benchmark]: Toolchain (without parser) took 6654.04ms. Allocated memory was 100.7MB in the beginning and 402.7MB in the end (delta: 302.0MB). Free memory was 69.9MB in the beginning and 248.0MB in the end (delta: -178.1MB). Peak memory consumption was 169.9MB. Max. memory is 16.1GB. [2021-11-23 17:41:31,376 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:31,379 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1679.42ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 69.9MB in the beginning and 59.8MB in the end (delta: 10.2MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2021-11-23 17:41:31,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 460.72ms. Allocated memory was 121.6MB in the beginning and 201.3MB in the end (delta: 79.7MB). Free memory was 59.8MB in the beginning and 117.2MB in the end (delta: -57.5MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2021-11-23 17:41:31,382 INFO L158 Benchmark]: Boogie Preprocessor took 311.48ms. Allocated memory is still 201.3MB. Free memory was 117.2MB in the beginning and 87.9MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-23 17:41:31,383 INFO L158 Benchmark]: RCFGBuilder took 4194.38ms. Allocated memory was 201.3MB in the beginning and 402.7MB in the end (delta: 201.3MB). Free memory was 87.9MB in the beginning and 248.0MB in the end (delta: -160.2MB). Peak memory consumption was 88.5MB. Max. memory is 16.1GB. [2021-11-23 17:41:31,394 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1679.42ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 69.9MB in the beginning and 59.8MB in the end (delta: 10.2MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 460.72ms. Allocated memory was 121.6MB in the beginning and 201.3MB in the end (delta: 79.7MB). Free memory was 59.8MB in the beginning and 117.2MB in the end (delta: -57.5MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 311.48ms. Allocated memory is still 201.3MB. Free memory was 117.2MB in the beginning and 87.9MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * RCFGBuilder took 4194.38ms. Allocated memory was 201.3MB in the beginning and 402.7MB in the end (delta: 201.3MB). Free memory was 87.9MB in the beginning and 248.0MB in the end (delta: -160.2MB). Peak memory consumption was 88.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:41:31,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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 c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:34,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:34,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:34,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:34,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:34,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:34,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:34,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:34,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:34,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:34,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:34,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:34,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:34,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:34,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:34,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:34,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:34,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:34,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:34,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:34,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:34,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:34,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:34,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:34,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:34,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:34,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:34,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:34,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:34,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:34,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:34,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:34,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:34,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:34,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:34,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:34,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:34,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:34,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:34,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:34,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:34,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:41:34,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:34,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:34,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:34,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:34,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:34,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:34,242 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:34,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:34,243 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:34,243 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:34,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:34,245 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:34,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:34,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:34,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:34,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:34,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:34,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:34,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:34,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:41:34,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:41:34,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:41:34,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:34,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:34,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:34,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:34,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:34,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:41:34,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:34,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:34,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:34,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:34,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:34,252 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:41:34,252 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:34,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:34,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:34,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:34,254 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 [2021-11-23 17:41:34,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:34,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:34,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:34,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:34,759 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:34,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-23 17:41:34,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/f433558a6/aac6ed4d987b40d7a8b2af13a9c361be/FLAGe341ca7d4 [2021-11-23 17:41:35,728 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:35,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-23 17:41:35,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/f433558a6/aac6ed4d987b40d7a8b2af13a9c361be/FLAGe341ca7d4 [2021-11-23 17:41:35,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/data/f433558a6/aac6ed4d987b40d7a8b2af13a9c361be [2021-11-23 17:41:35,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:35,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:35,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:35,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:35,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:35,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:35" (1/1) ... [2021-11-23 17:41:35,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d0eeb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:35, skipping insertion in model container [2021-11-23 17:41:35,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:35" (1/1) ... [2021-11-23 17:41:35,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:35,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:36,322 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-23 17:41:37,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:37,169 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:37,202 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_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-23 17:41:37,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:37,691 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:37,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37 WrapperNode [2021-11-23 17:41:37,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:37,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:37,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:37,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:37,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:37,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:37,936 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2608 [2021-11-23 17:41:37,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:37,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:37,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:37,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:37,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:37,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:37,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:37,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:38,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:38,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:38,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:38,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:38,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:38,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:38,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:38,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (1/1) ... [2021-11-23 17:41:38,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:38,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:38,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:38,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:38,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:41:38,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:38,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:38,393 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:38,395 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:42:13,758 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:42:13,783 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:42:13,784 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:42:13,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:42:13 BoogieIcfgContainer [2021-11-23 17:42:13,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:42:13,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:42:13,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:42:13,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:42:13,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:41:35" (1/3) ... [2021-11-23 17:42:13,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e19aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:42:13, skipping insertion in model container [2021-11-23 17:42:13,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:37" (2/3) ... [2021-11-23 17:42:13,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e19aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:42:13, skipping insertion in model container [2021-11-23 17:42:13,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:42:13" (3/3) ... [2021-11-23 17:42:13,798 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label34.c [2021-11-23 17:42:13,805 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:42:13,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:42:13,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:42:13,882 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 17:42:13,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:42:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 17:42:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:42:13,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:13,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:13,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 406614337, now seen corresponding path program 1 times [2021-11-23 17:42:13,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88858804] [2021-11-23 17:42:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:13,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:13,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:13,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:42:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:42:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:14,271 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 17:42:14,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:14,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88858804] [2021-11-23 17:42:14,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88858804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:14,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:42:14,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:42:14,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104895746] [2021-11-23 17:42:14,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:14,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:14,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:42:14,351 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:59,442 INFO L93 Difference]: Finished difference Result 1641 states and 3023 transitions. [2021-11-23 17:42:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 17:42:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:59,477 INFO L225 Difference]: With dead ends: 1641 [2021-11-23 17:42:59,478 INFO L226 Difference]: Without dead ends: 974 [2021-11-23 17:42:59,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 17:42:59,489 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 469 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:59,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 551 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 44.9s Time] [2021-11-23 17:42:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-23 17:42:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 971. [2021-11-23 17:42:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5082474226804123) internal successors, (1463), 970 states have internal predecessors, (1463), 0 states have call successors, (0), 0 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 17:42:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1463 transitions. [2021-11-23 17:42:59,646 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1463 transitions. Word has length 19 [2021-11-23 17:42:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:59,647 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1463 transitions. [2021-11-23 17:42:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1463 transitions. [2021-11-23 17:42:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 17:42:59,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:59,653 INFO L514 BasicCegarLoop]: trace histogram [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 17:42:59,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:59,859 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash 952084788, now seen corresponding path program 1 times [2021-11-23 17:42:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557052102] [2021-11-23 17:42:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:59,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:59,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:59,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:43:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:00,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:06,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:06,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557052102] [2021-11-23 17:43:06,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557052102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1569807454] [2021-11-23 17:43:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:06,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:06,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:06,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:43:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:43:06,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:07,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:11,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1569807454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:11,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613533393] [2021-11-23 17:43:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:11,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:11,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:11,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:43:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:43:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:12,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613533393] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:43:17,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:43:17,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 11 [2021-11-23 17:43:17,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191156660] [2021-11-23 17:43:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:17,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:43:17,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:17,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:43:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:43:17,720 INFO L87 Difference]: Start difference. First operand 971 states and 1463 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:26,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:44:20,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:44:33,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:45:23,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:45:39,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:45:40,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:46:15,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:46:41,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:47:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:07,439 INFO L93 Difference]: Finished difference Result 2398 states and 4039 transitions. [2021-11-23 17:47:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:47:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 17:47:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:07,455 INFO L225 Difference]: With dead ends: 2398 [2021-11-23 17:47:07,455 INFO L226 Difference]: Without dead ends: 1873 [2021-11-23 17:47:07,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:47:07,459 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1135 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 211.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:07,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 186 Invalid, 3721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1280 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 229.5s Time] [2021-11-23 17:47:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-23 17:47:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1865. [2021-11-23 17:47:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 1.5724248927038627) internal successors, (2931), 1864 states have internal predecessors, (2931), 0 states have call successors, (0), 0 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 17:47:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2931 transitions. [2021-11-23 17:47:07,531 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2931 transitions. Word has length 89 [2021-11-23 17:47:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:07,532 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2931 transitions. [2021-11-23 17:47:07,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:47:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2931 transitions. [2021-11-23 17:47:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:47:07,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:07,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:47:07,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:07,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:07,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-23 17:47:08,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:08,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1210658834, now seen corresponding path program 1 times [2021-11-23 17:47:08,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:08,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829233766] [2021-11-23 17:47:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:08,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:08,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:08,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:47:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:47:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:08,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:11,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:11,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829233766] [2021-11-23 17:47:11,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829233766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234788689] [2021-11-23 17:47:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:11,866 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:11,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:47:11,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:47:11,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:47:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:11,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:47:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:12,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:12,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234788689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:12,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:47:12,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:47:12,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167217053] [2021-11-23 17:47:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:12,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:12,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:12,184 INFO L87 Difference]: Start difference. First operand 1865 states and 2931 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 17:47:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:48,361 INFO L93 Difference]: Finished difference Result 5437 states and 8573 transitions. [2021-11-23 17:47:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:48,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-23 17:47:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:48,383 INFO L225 Difference]: With dead ends: 5437 [2021-11-23 17:47:48,383 INFO L226 Difference]: Without dead ends: 3574 [2021-11-23 17:47:48,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:48,387 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 476 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:48,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 968 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 36.1s Time] [2021-11-23 17:47:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-11-23 17:47:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3574. [2021-11-23 17:47:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3574 states, 3573 states have (on average 1.4494822278197592) internal successors, (5179), 3573 states have internal predecessors, (5179), 0 states have call successors, (0), 0 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 17:47:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 5179 transitions. [2021-11-23 17:47:48,476 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 5179 transitions. Word has length 102 [2021-11-23 17:47:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:48,477 INFO L470 AbstractCegarLoop]: Abstraction has 3574 states and 5179 transitions. [2021-11-23 17:47:48,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 17:47:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 5179 transitions. [2021-11-23 17:47:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 17:47:48,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:48,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:47:48,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:48,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:48,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:48,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1089556668, now seen corresponding path program 1 times [2021-11-23 17:47:48,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:48,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938392462] [2021-11-23 17:47:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:48,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:48,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:48,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:47:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:47:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:49,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:49,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938392462] [2021-11-23 17:47:49,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938392462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:49,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:47:49,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:47:49,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258181131] [2021-11-23 17:47:49,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:49,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:49,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:49,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:47:49,300 INFO L87 Difference]: Start difference. First operand 3574 states and 5179 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 17:48:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:48:29,476 INFO L93 Difference]: Finished difference Result 8841 states and 13055 transitions. [2021-11-23 17:48:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:48:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-23 17:48:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:48:29,506 INFO L225 Difference]: With dead ends: 8841 [2021-11-23 17:48:29,507 INFO L226 Difference]: Without dead ends: 5269 [2021-11-23 17:48:29,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 17:48:29,513 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 466 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:48:29,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 958 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 40.1s Time] [2021-11-23 17:48:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2021-11-23 17:48:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 5268. [2021-11-23 17:48:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.391304347826087) internal successors, (7328), 5267 states have internal predecessors, (7328), 0 states have call successors, (0), 0 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 17:48:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 7328 transitions. [2021-11-23 17:48:29,684 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 7328 transitions. Word has length 125 [2021-11-23 17:48:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:48:29,685 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 7328 transitions. [2021-11-23 17:48:29,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 17:48:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 7328 transitions. [2021-11-23 17:48:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 17:48:29,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:48:29,698 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:48:29,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:29,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:48:29,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:48:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:48:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -543463125, now seen corresponding path program 1 times [2021-11-23 17:48:29,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:48:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588753120] [2021-11-23 17:48:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:29,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:48:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:48:29,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:48:29,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:48:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:48:30,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:32,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:52,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:48:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588753120] [2021-11-23 17:48:52,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588753120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129428782] [2021-11-23 17:48:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:52,148 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:48:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:48:52,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:48:52,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:48:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:48:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:52,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:48:52,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129428782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:48:52,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:48:52,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:48:52,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800581206] [2021-11-23 17:48:52,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:48:52,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:48:52,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:48:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:48:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:48:52,751 INFO L87 Difference]: Start difference. First operand 5268 states and 7328 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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 17:49:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:49:24,424 INFO L93 Difference]: Finished difference Result 9665 states and 13704 transitions. [2021-11-23 17:49:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:49:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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 17:49:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:49:24,455 INFO L225 Difference]: With dead ends: 9665 [2021-11-23 17:49:24,455 INFO L226 Difference]: Without dead ends: 3969 [2021-11-23 17:49:24,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:49:24,463 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 380 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:49:24,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 578 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2021-11-23 17:49:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2021-11-23 17:49:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3969. [2021-11-23 17:49:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3968 states have (on average 1.1751512096774193) internal successors, (4663), 3968 states have internal predecessors, (4663), 0 states have call successors, (0), 0 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 17:49:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 4663 transitions. [2021-11-23 17:49:24,559 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 4663 transitions. Word has length 164 [2021-11-23 17:49:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:49:24,559 INFO L470 AbstractCegarLoop]: Abstraction has 3969 states and 4663 transitions. [2021-11-23 17:49:24,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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 17:49:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 4663 transitions. [2021-11-23 17:49:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 17:49:24,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:49:24,563 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:49:24,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:49:24,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:49:24,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:49:24,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:49:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:49:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1935512509, now seen corresponding path program 1 times [2021-11-23 17:49:24,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:49:24,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423046000] [2021-11-23 17:49:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:24,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:49:24,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:49:24,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:49:24,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:49:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:49:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:49:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:49:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:49:29,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:49:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423046000] [2021-11-23 17:49:29,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423046000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:49:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60312784] [2021-11-23 17:49:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:29,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:49:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:49:29,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:49:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:49:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:49:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 17:49:29,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:49:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60312784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:49:29,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:49:29,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:49:29,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293858040] [2021-11-23 17:49:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:49:29,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:49:29,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:49:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:49:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:49:29,843 INFO L87 Difference]: Start difference. First operand 3969 states and 4663 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:50:03,932 INFO L93 Difference]: Finished difference Result 10060 states and 11959 transitions. [2021-11-23 17:50:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:50:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 173 [2021-11-23 17:50:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:50:03,969 INFO L225 Difference]: With dead ends: 10060 [2021-11-23 17:50:03,969 INFO L226 Difference]: Without dead ends: 6518 [2021-11-23 17:50:03,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:50:03,974 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 425 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:50:03,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 429 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 34.0s Time] [2021-11-23 17:50:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6518 states. [2021-11-23 17:50:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6518 to 6093. [2021-11-23 17:50:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6092 states have (on average 1.1344386080105056) internal successors, (6911), 6092 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 6911 transitions. [2021-11-23 17:50:04,100 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 6911 transitions. Word has length 173 [2021-11-23 17:50:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:50:04,100 INFO L470 AbstractCegarLoop]: Abstraction has 6093 states and 6911 transitions. [2021-11-23 17:50:04,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 6911 transitions. [2021-11-23 17:50:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 17:50:04,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:50:04,104 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:50:04,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:04,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 17:50:04,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:50:04,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:50:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:50:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 96286639, now seen corresponding path program 1 times [2021-11-23 17:50:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:50:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413347761] [2021-11-23 17:50:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:50:04,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:50:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:50:04,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:50:04,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:50:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:50:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:50:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:05,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:50:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:08,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:50:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413347761] [2021-11-23 17:50:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413347761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:50:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [535793459] [2021-11-23 17:50:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:50:08,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:50:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:50:08,764 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:50:08,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:50:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:50:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:50:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 17:50:09,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:50:09,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [535793459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:50:09,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:50:09,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:50:09,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084535425] [2021-11-23 17:50:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:50:09,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:50:09,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:50:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:50:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:50:09,522 INFO L87 Difference]: Start difference. First operand 6093 states and 6911 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:22,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:28,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:50,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:50:55,574 INFO L93 Difference]: Finished difference Result 16861 states and 19198 transitions. [2021-11-23 17:50:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:50:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 186 [2021-11-23 17:50:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:50:55,621 INFO L225 Difference]: With dead ends: 16861 [2021-11-23 17:50:55,621 INFO L226 Difference]: Without dead ends: 9063 [2021-11-23 17:50:55,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:50:55,630 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 431 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:50:55,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 868 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 46.0s Time] [2021-11-23 17:50:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2021-11-23 17:50:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 8636. [2021-11-23 17:50:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 8635 states have (on average 1.105732484076433) internal successors, (9548), 8635 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 9548 transitions. [2021-11-23 17:50:55,807 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 9548 transitions. Word has length 186 [2021-11-23 17:50:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:50:55,807 INFO L470 AbstractCegarLoop]: Abstraction has 8636 states and 9548 transitions. [2021-11-23 17:50:55,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:50:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 9548 transitions. [2021-11-23 17:50:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 17:50:55,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:50:55,812 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:50:55,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:50:56,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:50:56,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:50:56,216 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:50:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:50:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash -928589185, now seen corresponding path program 1 times [2021-11-23 17:50:56,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:50:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238601638] [2021-11-23 17:50:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:50:56,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:50:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:50:56,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:50:56,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:50:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:50:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:50:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:57,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:01,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:51:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238601638] [2021-11-23 17:51:01,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238601638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:01,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922360072] [2021-11-23 17:51:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:01,058 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:51:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:51:01,060 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:51:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:51:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:51:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 17:51:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 17:51:07,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922360072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:07,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327382726] [2021-11-23 17:51:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:07,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:51:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:51:07,947 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:51:07,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901b72c6-74d2-42d5-aa3a-b8b6e2b5dbd1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:51:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:51:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:08,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:16,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327382726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:16,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:51:16,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2021-11-23 17:51:16,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741366481] [2021-11-23 17:51:16,512 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:51:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:51:16,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:51:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:51:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:51:16,516 INFO L87 Difference]: Start difference. First operand 8636 states and 9548 transitions. Second operand has 9 states, 9 states have (on average 91.44444444444444) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 0 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 17:51:32,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:51,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:22,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:25,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:26,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:52:41,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:54:22,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []