./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label07.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_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/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_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/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_70d3f25e-f094-4001-9f81-325530707500/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 a8cf6243f0ab4090e55b0c0c5f0ae4cf837fa81bc993d776b406c2b0dbd3865c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:22:37,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:22:37,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:22:37,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:22:37,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:22:37,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:22:37,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:22:37,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:22:37,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:22:37,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:22:37,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:22:37,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:22:37,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:22:37,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:22:37,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:22:37,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:22:37,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:22:37,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:22:37,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:22:37,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:22:37,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:22:37,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:22:37,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:22:37,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:22:37,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:22:37,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:22:37,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:22:37,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:22:37,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:22:37,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:22:37,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:22:37,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:22:37,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:22:37,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:22:37,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:22:37,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:22:37,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:22:37,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:22:37,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:22:37,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:22:37,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:22:37,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:22:37,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:22:37,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:22:37,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:22:37,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:22:37,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:22:37,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:22:37,225 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:22:37,225 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:22:37,225 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:22:37,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:22:37,225 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:22:37,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:22:37,226 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:22:37,226 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:22:37,226 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:22:37,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:22:37,227 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:22:37,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:22:37,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:22:37,228 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:22:37,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:22:37,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:22:37,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:22:37,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:22:37,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:22:37,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:22:37,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:22:37,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:22:37,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:22:37,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:22:37,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:22:37,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:22:37,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:37,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:22:37,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:22:37,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:22:37,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:22:37,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:22:37,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:22:37,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:22:37,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:22:37,232 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_70d3f25e-f094-4001-9f81-325530707500/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8cf6243f0ab4090e55b0c0c5f0ae4cf837fa81bc993d776b406c2b0dbd3865c [2021-11-23 17:22:37,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:22:37,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:22:37,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:22:37,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:22:37,555 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:22:37,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem16_label07.c [2021-11-23 17:22:37,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/05ae7a155/588070da4bee476fbaa73788637ec2c4/FLAGf9d20e4bf [2021-11-23 17:22:38,308 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:22:38,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c [2021-11-23 17:22:38,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/05ae7a155/588070da4bee476fbaa73788637ec2c4/FLAGf9d20e4bf [2021-11-23 17:22:38,452 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/05ae7a155/588070da4bee476fbaa73788637ec2c4 [2021-11-23 17:22:38,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:22:38,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:22:38,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:38,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:22:38,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:22:38,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:38" (1/1) ... [2021-11-23 17:22:38,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d84682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:38, skipping insertion in model container [2021-11-23 17:22:38,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:38" (1/1) ... [2021-11-23 17:22:38,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:22:38,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:22:38,921 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_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c[5709,5722] [2021-11-23 17:22:39,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:39,401 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:22:39,426 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_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c[5709,5722] [2021-11-23 17:22:39,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:39,708 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:22:39,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39 WrapperNode [2021-11-23 17:22:39,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:39,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:39,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:22:39,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:22:39,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:39,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:39,934 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-11-23 17:22:39,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:39,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:22:39,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:22:39,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:22:39,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:39,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:39,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:39,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:40,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:40,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:40,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:40,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:22:40,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:22:40,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:22:40,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:22:40,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:39" (1/1) ... [2021-11-23 17:22:40,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:40,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:22:40,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:22:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:22:40,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:22:40,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:22:40,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:22:40,320 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:22:40,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:22:42,500 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:22:42,556 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 17:22:42,562 INFO L158 Benchmark]: Toolchain (without parser) took 4103.53ms. Allocated memory was 107.0MB in the beginning and 176.2MB in the end (delta: 69.2MB). Free memory was 66.4MB in the beginning and 78.8MB in the end (delta: -12.4MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. [2021-11-23 17:22:42,563 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:22:42,564 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1250.01ms. Allocated memory is still 107.0MB. Free memory was 66.2MB in the beginning and 70.8MB in the end (delta: -4.6MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-11-23 17:22:42,566 INFO L158 Benchmark]: Boogie Procedure Inliner took 224.96ms. Allocated memory is still 107.0MB. Free memory was 70.8MB in the beginning and 47.5MB in the end (delta: 23.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-23 17:22:42,567 INFO L158 Benchmark]: Boogie Preprocessor took 224.89ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 57.4MB in the end (delta: -9.9MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2021-11-23 17:22:42,568 INFO L158 Benchmark]: RCFGBuilder took 2397.17ms. Allocated memory was 107.0MB in the beginning and 176.2MB in the end (delta: 69.2MB). Free memory was 57.4MB in the beginning and 78.8MB in the end (delta: -21.4MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2021-11-23 17:22:42,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1250.01ms. Allocated memory is still 107.0MB. Free memory was 66.2MB in the beginning and 70.8MB in the end (delta: -4.6MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 224.96ms. Allocated memory is still 107.0MB. Free memory was 70.8MB in the beginning and 47.5MB in the end (delta: 23.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 224.89ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 57.4MB in the end (delta: -9.9MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. * RCFGBuilder took 2397.17ms. Allocated memory was 107.0MB in the beginning and 176.2MB in the end (delta: 69.2MB). Free memory was 57.4MB in the beginning and 78.8MB in the end (delta: -21.4MB). Peak memory consumption was 60.8MB. 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 17:22:42,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/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_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/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_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/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_70d3f25e-f094-4001-9f81-325530707500/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 a8cf6243f0ab4090e55b0c0c5f0ae4cf837fa81bc993d776b406c2b0dbd3865c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:22:45,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:22:45,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:22:45,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:22:45,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:22:45,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:22:45,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:22:45,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:22:45,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:22:45,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:22:45,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:22:45,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:22:45,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:22:45,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:22:45,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:22:45,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:22:45,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:22:45,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:22:45,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:22:45,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:22:45,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:22:45,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:22:45,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:22:45,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:22:45,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:22:45,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:22:45,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:22:45,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:22:45,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:22:45,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:22:45,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:22:45,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:22:45,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:22:45,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:22:45,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:22:45,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:22:45,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:22:45,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:22:45,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:22:45,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:22:45,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:22:45,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:22:45,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:22:45,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:22:45,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:22:45,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:22:45,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:22:45,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:22:45,329 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:22:45,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:22:45,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:22:45,330 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:22:45,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:22:45,330 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:22:45,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:22:45,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:22:45,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:22:45,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:22:45,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:22:45,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:22:45,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:22:45,333 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:22:45,333 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:22:45,333 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:22:45,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:22:45,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:22:45,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:22:45,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:22:45,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:22:45,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:22:45,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:22:45,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:45,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:22:45,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:22:45,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:22:45,336 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:22:45,336 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:45,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:22:45,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:22:45,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:22:45,337 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_70d3f25e-f094-4001-9f81-325530707500/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8cf6243f0ab4090e55b0c0c5f0ae4cf837fa81bc993d776b406c2b0dbd3865c [2021-11-23 17:22:45,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:22:45,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:22:45,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:22:45,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:22:45,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:22:45,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem16_label07.c [2021-11-23 17:22:45,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/1caf0ae19/f9c9e60111c14f8a83d70ffd33fb06b3/FLAG03683e526 [2021-11-23 17:22:46,565 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:22:46,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c [2021-11-23 17:22:46,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/1caf0ae19/f9c9e60111c14f8a83d70ffd33fb06b3/FLAG03683e526 [2021-11-23 17:22:46,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/data/1caf0ae19/f9c9e60111c14f8a83d70ffd33fb06b3 [2021-11-23 17:22:46,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:22:46,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:22:46,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:46,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:22:46,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:22:46,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:46" (1/1) ... [2021-11-23 17:22:46,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349f9c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:46, skipping insertion in model container [2021-11-23 17:22:46,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:46" (1/1) ... [2021-11-23 17:22:46,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:22:46,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:22:47,167 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_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c[5709,5722] [2021-11-23 17:22:47,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:47,759 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:22:47,797 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_70d3f25e-f094-4001-9f81-325530707500/sv-benchmarks/c/eca-rers2012/Problem16_label07.c[5709,5722] [2021-11-23 17:22:48,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:48,077 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:22:48,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48 WrapperNode [2021-11-23 17:22:48,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:48,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:48,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:22:48,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:22:48,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,240 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1765 [2021-11-23 17:22:48,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:48,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:22:48,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:22:48,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:22:48,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:22:48,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:22:48,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:22:48,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:22:48,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (1/1) ... [2021-11-23 17:22:48,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:48,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:22:48,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:22:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:22:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:22:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:22:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:22:48,599 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:22:48,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:22:57,092 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:22:57,106 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:22:57,107 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:22:57,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:22:57 BoogieIcfgContainer [2021-11-23 17:22:57,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:22:57,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:22:57,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:22:57,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:22:57,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:22:46" (1/3) ... [2021-11-23 17:22:57,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce3305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:22:57, skipping insertion in model container [2021-11-23 17:22:57,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:48" (2/3) ... [2021-11-23 17:22:57,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce3305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:22:57, skipping insertion in model container [2021-11-23 17:22:57,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:22:57" (3/3) ... [2021-11-23 17:22:57,147 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2021-11-23 17:22:57,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:22:57,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:22:57,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:22:57,213 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 17:22:57,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:22:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 17:22:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 17:22:57,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:57,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:57,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-23 17:22:57,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:57,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493380169] [2021-11-23 17:22:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:57,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:57,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:57,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:22:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:57,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:57,746 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 17:22:57,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:57,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493380169] [2021-11-23 17:22:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493380169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:57,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:57,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:57,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781280204] [2021-11-23 17:22:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:57,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:57,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:57,811 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:08,861 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-11-23 17:23:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 17:23:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:08,887 INFO L225 Difference]: With dead ends: 1122 [2021-11-23 17:23:08,887 INFO L226 Difference]: Without dead ends: 662 [2021-11-23 17:23:08,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 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 17:23:08,897 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 291 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:08,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 290 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2021-11-23 17:23:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-23 17:23:09,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-11-23 17:23:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 0 states have call successors, (0), 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 17:23:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2021-11-23 17:23:09,011 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 54 [2021-11-23 17:23:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:09,012 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2021-11-23 17:23:09,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2021-11-23 17:23:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 17:23:09,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:09,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:09,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:09,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:09,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2060883846, now seen corresponding path program 1 times [2021-11-23 17:23:09,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:09,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669657926] [2021-11-23 17:23:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:09,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:09,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:09,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:23:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:09,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:09,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:09,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669657926] [2021-11-23 17:23:09,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669657926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:09,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:09,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712993210] [2021-11-23 17:23:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:09,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:09,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:09,816 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:17,694 INFO L93 Difference]: Finished difference Result 1651 states and 2341 transitions. [2021-11-23 17:23:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-23 17:23:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:17,702 INFO L225 Difference]: With dead ends: 1651 [2021-11-23 17:23:17,703 INFO L226 Difference]: Without dead ends: 991 [2021-11-23 17:23:17,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 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 17:23:17,706 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 260 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:17,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 249 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 17:23:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-23 17:23:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-11-23 17:23:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3525252525252525) internal successors, (1339), 990 states have internal predecessors, (1339), 0 states have call successors, (0), 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 17:23:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1339 transitions. [2021-11-23 17:23:17,775 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1339 transitions. Word has length 126 [2021-11-23 17:23:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:17,779 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1339 transitions. [2021-11-23 17:23:17,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1339 transitions. [2021-11-23 17:23:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 17:23:17,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:17,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:23:17,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:23:18,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:18,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1161720935, now seen corresponding path program 1 times [2021-11-23 17:23:18,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103118575] [2021-11-23 17:23:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:18,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:18,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:23:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:18,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:18,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103118575] [2021-11-23 17:23:18,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103118575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:18,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:23:18,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770231100] [2021-11-23 17:23:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:18,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:18,456 INFO L87 Difference]: Start difference. First operand 991 states and 1339 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 17:23:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:28,868 INFO L93 Difference]: Finished difference Result 2638 states and 3653 transitions. [2021-11-23 17:23:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-11-23 17:23:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:28,882 INFO L225 Difference]: With dead ends: 2638 [2021-11-23 17:23:28,882 INFO L226 Difference]: Without dead ends: 1978 [2021-11-23 17:23:28,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 17:23:28,886 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 316 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:28,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 199 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 17:23:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-11-23 17:23:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-11-23 17:23:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2281234193222053) internal successors, (2428), 1977 states have internal predecessors, (2428), 0 states have call successors, (0), 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 17:23:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2428 transitions. [2021-11-23 17:23:28,945 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2428 transitions. Word has length 141 [2021-11-23 17:23:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:28,946 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2428 transitions. [2021-11-23 17:23:28,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 17:23:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2428 transitions. [2021-11-23 17:23:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-23 17:23:28,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:28,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:23:28,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:29,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:29,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -599376045, now seen corresponding path program 1 times [2021-11-23 17:23:29,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:29,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134415689] [2021-11-23 17:23:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:29,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:29,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:29,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:23:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:23:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 114 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:31,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 114 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:35,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:35,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134415689] [2021-11-23 17:23:35,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134415689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:35,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937191433] [2021-11-23 17:23:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:35,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:35,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:35,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:23:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:35,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 118 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:38,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 151 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:40,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937191433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742419292] [2021-11-23 17:23:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:40,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:40,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:23:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:23:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:40,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:23:40,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:41,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:41,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742419292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:41,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:23:41,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 8, 8, 5, 5] total 18 [2021-11-23 17:23:41,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602182998] [2021-11-23 17:23:41,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:23:41,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:23:41,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:23:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:23:41,731 INFO L87 Difference]: Start difference. First operand 1978 states and 2428 transitions. Second operand has 18 states, 18 states have (on average 40.22222222222222) internal successors, (724), 18 states have internal predecessors, (724), 0 states have call successors, (0), 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 17:23:59,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:00,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:02,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:06,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:21,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:23,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:24,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:26,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:34,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:36,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:05,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:07,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:09,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:11,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:16,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:26,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:38,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:45,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:29,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:43,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:59,223 WARN L534 Checker$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 17:27:32,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:43,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:04,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:26,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:29,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:31,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:33,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:35,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:45,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:47,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:01,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:03,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:14,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:18,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:26,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:29,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:31,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:33,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:35,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:36,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:39,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:41,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:43,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:44,822 WARN L534 Checker$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 17:29:45,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:51,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:53,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:01,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:18,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:20,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:23,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:31,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:33,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:35,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:37,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:46,551 WARN L534 Checker$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 17:30:51,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:52,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:59,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:07,679 WARN L534 Checker$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 17:31:39,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:47,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:49,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:09,703 WARN L534 Checker$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 17:32:37,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:39,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:41,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:42,422 WARN L534 Checker$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 17:32:43,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:48,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:50,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:03,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:04,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:06,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:09,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:21,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:22,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:28,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:54,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:12,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:15,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:20,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:31,677 INFO L93 Difference]: Finished difference Result 11635 states and 16754 transitions. [2021-11-23 17:34:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 17:34:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 40.22222222222222) internal successors, (724), 18 states have internal predecessors, (724), 0 states have call successors, (0), 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 209 [2021-11-23 17:34:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:31,735 INFO L225 Difference]: With dead ends: 11635 [2021-11-23 17:34:31,735 INFO L226 Difference]: Without dead ends: 7900 [2021-11-23 17:34:31,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1259 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:34:31,745 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 18386 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 13425 mSolverCounterSat, 6611 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 606.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18386 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 20056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6611 IncrementalHoareTripleChecker+Valid, 13425 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 640.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:31,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18386 Valid, 202 Invalid, 20056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6611 Valid, 13425 Invalid, 20 Unknown, 0 Unchecked, 640.3s Time] [2021-11-23 17:34:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-11-23 17:34:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 5926. [2021-11-23 17:34:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0757805907172995) internal successors, (6374), 5925 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6374 transitions. [2021-11-23 17:34:31,957 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6374 transitions. Word has length 209 [2021-11-23 17:34:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:31,958 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6374 transitions. [2021-11-23 17:34:31,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 40.22222222222222) internal successors, (724), 18 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6374 transitions. [2021-11-23 17:34:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2021-11-23 17:34:31,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:31,974 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:34:31,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:32,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:32,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:32,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:32,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:32,586 INFO L85 PathProgramCache]: Analyzing trace with hash -436175478, now seen corresponding path program 1 times [2021-11-23 17:34:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711130433] [2021-11-23 17:34:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:32,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:32,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:32,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:34:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:32,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 17:34:35,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:35,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711130433] [2021-11-23 17:34:35,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711130433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:35,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:35,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:34:35,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006274914] [2021-11-23 17:34:35,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:35,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:35,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:35,302 INFO L87 Difference]: Start difference. First operand 5926 states and 6374 transitions. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:41,209 INFO L93 Difference]: Finished difference Result 11521 states and 12415 transitions. [2021-11-23 17:34:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 525 [2021-11-23 17:34:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:41,242 INFO L225 Difference]: With dead ends: 11521 [2021-11-23 17:34:41,242 INFO L226 Difference]: Without dead ends: 5926 [2021-11-23 17:34:41,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:41,250 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 303 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:41,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 116 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 17:34:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-11-23 17:34:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2021-11-23 17:34:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0745991561181434) internal successors, (6367), 5925 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6367 transitions. [2021-11-23 17:34:41,432 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6367 transitions. Word has length 525 [2021-11-23 17:34:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:41,434 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6367 transitions. [2021-11-23 17:34:41,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6367 transitions. [2021-11-23 17:34:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-23 17:34:41,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:41,452 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:34:41,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:41,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:41,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2064845994, now seen corresponding path program 1 times [2021-11-23 17:34:41,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:41,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147045185] [2021-11-23 17:34:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:41,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:41,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:41,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:34:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 472 proven. 315 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 17:34:44,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 17:34:47,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147045185] [2021-11-23 17:34:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147045185] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:34:47,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:34:47,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 17:34:47,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931351978] [2021-11-23 17:34:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:34:47,470 INFO L87 Difference]: Start difference. First operand 5926 states and 6367 transitions. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:03,308 INFO L93 Difference]: Finished difference Result 12837 states and 13949 transitions. [2021-11-23 17:35:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:35:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 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 629 [2021-11-23 17:35:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:03,346 INFO L225 Difference]: With dead ends: 12837 [2021-11-23 17:35:03,346 INFO L226 Difference]: Without dead ends: 7571 [2021-11-23 17:35:03,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:35:03,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 211 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:03,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 25 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2021-11-23 17:35:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-11-23 17:35:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7242. [2021-11-23 17:35:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 1.0784422041154538) internal successors, (7809), 7241 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 7809 transitions. [2021-11-23 17:35:03,543 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 7809 transitions. Word has length 629 [2021-11-23 17:35:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 7809 transitions. [2021-11-23 17:35:03,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 7809 transitions. [2021-11-23 17:35:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2021-11-23 17:35:03,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:03,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:35:03,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:03,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:03,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 549418274, now seen corresponding path program 1 times [2021-11-23 17:35:03,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:03,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664493041] [2021-11-23 17:35:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:03,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:03,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:03,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:35:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:35:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-23 17:35:07,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:07,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664493041] [2021-11-23 17:35:07,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664493041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:07,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:07,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:35:07,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547795983] [2021-11-23 17:35:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:07,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:35:07,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:35:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:35:07,982 INFO L87 Difference]: Start difference. First operand 7242 states and 7809 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:12,547 INFO L93 Difference]: Finished difference Result 13824 states and 14954 transitions. [2021-11-23 17:35:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:35:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 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 653 [2021-11-23 17:35:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:12,585 INFO L225 Difference]: With dead ends: 13824 [2021-11-23 17:35:12,585 INFO L226 Difference]: Without dead ends: 7242 [2021-11-23 17:35:12,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 651 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 17:35:12,593 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:12,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 107 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 17:35:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2021-11-23 17:35:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 7242. [2021-11-23 17:35:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 1.0783041016434194) internal successors, (7808), 7241 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 7808 transitions. [2021-11-23 17:35:12,778 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 7808 transitions. Word has length 653 [2021-11-23 17:35:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:12,779 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 7808 transitions. [2021-11-23 17:35:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 7808 transitions. [2021-11-23 17:35:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2021-11-23 17:35:12,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:12,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:35:12,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:13,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:13,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash 164556319, now seen corresponding path program 1 times [2021-11-23 17:35:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875944045] [2021-11-23 17:35:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:13,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:13,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:13,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:35:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:35:13,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 207 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:18,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 421 proven. 357 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 17:35:22,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875944045] [2021-11-23 17:35:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875944045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466522534] [2021-11-23 17:35:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:22,669 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:22,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:22,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:35:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:35:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 17:35:24,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:24,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466522534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:24,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:35:24,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 10 [2021-11-23 17:35:24,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097221617] [2021-11-23 17:35:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:24,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:35:24,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:35:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:35:24,220 INFO L87 Difference]: Start difference. First operand 7242 states and 7808 transitions. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:29,515 INFO L93 Difference]: Finished difference Result 16127 states and 17489 transitions. [2021-11-23 17:35:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:35:29,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 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 663 [2021-11-23 17:35:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:29,537 INFO L225 Difference]: With dead ends: 16127 [2021-11-23 17:35:29,537 INFO L226 Difference]: Without dead ends: 9545 [2021-11-23 17:35:29,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1986 GetRequests, 1978 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:35:29,547 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:29,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 423 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 17:35:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-11-23 17:35:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 8887. [2021-11-23 17:35:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.067972090929552) internal successors, (9490), 8886 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9490 transitions. [2021-11-23 17:35:29,738 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9490 transitions. Word has length 663 [2021-11-23 17:35:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:29,739 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9490 transitions. [2021-11-23 17:35:29,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9490 transitions. [2021-11-23 17:35:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2021-11-23 17:35:29,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:29,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:29,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:29,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 17:35:30,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:30,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash -346867286, now seen corresponding path program 1 times [2021-11-23 17:35:30,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82352524] [2021-11-23 17:35:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:30,163 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:30,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:35:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:35:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 487 proven. 317 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-23 17:35:34,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 487 proven. 317 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-23 17:35:53,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82352524] [2021-11-23 17:35:53,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82352524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [716710278] [2021-11-23 17:35:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:53,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:53,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:53,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:53,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:35:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:35:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 539 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 17:35:55,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [716710278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:55,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:35:55,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:35:55,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641046971] [2021-11-23 17:35:55,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:55,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:35:55,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:35:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:35:55,455 INFO L87 Difference]: Start difference. First operand 8887 states and 9490 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:00,791 INFO L93 Difference]: Finished difference Result 19088 states and 20454 transitions. [2021-11-23 17:36:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 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 778 [2021-11-23 17:36:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:00,830 INFO L225 Difference]: With dead ends: 19088 [2021-11-23 17:36:00,830 INFO L226 Difference]: Without dead ends: 10861 [2021-11-23 17:36:00,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2325 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:36:00,882 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 223 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:00,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 417 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 17:36:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-11-23 17:36:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10203. [2021-11-23 17:36:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10202 states have (on average 1.05636149774554) internal successors, (10777), 10202 states have internal predecessors, (10777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10777 transitions. [2021-11-23 17:36:01,037 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10777 transitions. Word has length 778 [2021-11-23 17:36:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 10777 transitions. [2021-11-23 17:36:01,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10777 transitions. [2021-11-23 17:36:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2021-11-23 17:36:01,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:01,052 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:36:01,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:01,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:01,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:01,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1477517953, now seen corresponding path program 1 times [2021-11-23 17:36:01,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820129454] [2021-11-23 17:36:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:01,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:01,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:01,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:01,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70d3f25e-f094-4001-9f81-325530707500/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:36:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:36:01,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 681 proven. 249 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-23 17:36:04,731 INFO L328 TraceCheckSpWp]: Computing backward predicates...