./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label54.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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:21,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:21,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:21,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:21,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:21,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:21,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:21,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:21,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:21,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:21,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:21,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:21,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:21,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:21,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:21,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:21,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:21,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:21,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:21,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:21,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:21,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:21,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:21,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:21,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:21,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:21,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:21,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:21,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:21,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:21,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:21,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:21,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:21,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:21,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:21,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:21,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:21,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:21,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:21,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:21,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:21,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:24:21,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:21,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:21,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:21,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:21,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:21,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:21,961 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:21,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:21,962 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:21,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:24:21,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:21,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:21,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:24:21,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:24:21,965 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:21,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:24:21,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:24:21,966 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:24:21,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:21,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:21,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:24:21,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:21,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:21,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:21,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:21,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:21,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:21,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:21,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:21,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:21,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:21,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:21,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:21,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:21,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:21,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:21,974 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:24:21,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:24:21,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:21,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:21,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:21,976 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 [2021-11-23 17:24:22,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:22,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:22,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:22,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:22,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:22,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2021-11-23 17:24:22,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/63942ecfd/9d3b4b2b0ade4216927212a4825fdab8/FLAG8bd6d1a63 [2021-11-23 17:24:23,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:23,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2021-11-23 17:24:23,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/63942ecfd/9d3b4b2b0ade4216927212a4825fdab8/FLAG8bd6d1a63 [2021-11-23 17:24:23,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/63942ecfd/9d3b4b2b0ade4216927212a4825fdab8 [2021-11-23 17:24:23,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:23,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:23,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:23,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:23,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:23,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:23" (1/1) ... [2021-11-23 17:24:23,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4909d22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:23, skipping insertion in model container [2021-11-23 17:24:23,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:23" (1/1) ... [2021-11-23 17:24:23,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:23,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:24,403 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2021-11-23 17:24:24,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:24,470 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:24,817 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2021-11-23 17:24:24,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:24,923 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:24,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24 WrapperNode [2021-11-23 17:24:24,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:24,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:24,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:24,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:24,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:24,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,104 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-23 17:24:25,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:25,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:25,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:25,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:25,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:25,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:25,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:25,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:25,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:24" (1/1) ... [2021-11-23 17:24:25,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:25,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:25,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:24:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:25,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:25,528 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:25,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:27,636 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:27,717 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 17:24:27,726 INFO L158 Benchmark]: Toolchain (without parser) took 4238.07ms. Allocated memory was 94.4MB in the beginning and 197.1MB in the end (delta: 102.8MB). Free memory was 54.2MB in the beginning and 119.9MB in the end (delta: -65.6MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. [2021-11-23 17:24:27,727 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:24:27,728 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1433.48ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 54.1MB in the beginning and 104.2MB in the end (delta: -50.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2021-11-23 17:24:27,729 INFO L158 Benchmark]: Boogie Procedure Inliner took 181.32ms. Allocated memory is still 138.4MB. Free memory was 104.2MB in the beginning and 89.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 17:24:27,730 INFO L158 Benchmark]: Boogie Preprocessor took 185.17ms. Allocated memory is still 138.4MB. Free memory was 89.5MB in the beginning and 79.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:24:27,731 INFO L158 Benchmark]: RCFGBuilder took 2429.60ms. Allocated memory was 138.4MB in the beginning and 197.1MB in the end (delta: 58.7MB). Free memory was 79.6MB in the beginning and 119.9MB in the end (delta: -40.3MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2021-11-23 17:24:27,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1433.48ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 54.1MB in the beginning and 104.2MB in the end (delta: -50.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 181.32ms. Allocated memory is still 138.4MB. Free memory was 104.2MB in the beginning and 89.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 185.17ms. Allocated memory is still 138.4MB. Free memory was 89.5MB in the beginning and 79.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 2429.60ms. Allocated memory was 138.4MB in the beginning and 197.1MB in the end (delta: 58.7MB). Free memory was 79.6MB in the beginning and 119.9MB in the end (delta: -40.3MB). Peak memory consumption was 45.0MB. 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 17:24:27,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:30,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:30,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:30,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:30,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:30,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:30,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:30,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:30,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:30,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:30,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:30,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:30,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:30,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:30,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:30,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:30,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:30,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:30,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:30,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:30,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:30,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:30,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:30,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:30,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:30,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:30,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:30,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:30,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:30,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:30,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:30,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:30,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:30,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:30,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:30,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:30,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:30,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:30,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:30,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:30,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:30,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:24:30,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:30,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:30,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:30,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:30,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:30,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:30,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:30,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:30,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:30,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:30,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:30,965 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:30,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:30,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:30,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:30,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:30,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:30,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:30,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:30,969 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:24:30,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:24:30,970 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:24:30,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:30,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:30,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:30,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:30,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:30,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:24:30,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:30,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:30,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:30,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:30,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:30,975 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:24:30,975 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:30,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:30,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:30,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:30,977 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 [2021-11-23 17:24:31,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:31,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:31,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:31,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:31,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:31,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2021-11-23 17:24:31,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/f998bd1d5/a89d357d38384e9099d5036991709c76/FLAG61a874c2b [2021-11-23 17:24:32,601 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:32,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2021-11-23 17:24:32,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/f998bd1d5/a89d357d38384e9099d5036991709c76/FLAG61a874c2b [2021-11-23 17:24:33,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/data/f998bd1d5/a89d357d38384e9099d5036991709c76 [2021-11-23 17:24:33,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:33,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:33,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:33,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:33,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:33,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:33" (1/1) ... [2021-11-23 17:24:33,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4c6622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:33, skipping insertion in model container [2021-11-23 17:24:33,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:33" (1/1) ... [2021-11-23 17:24:33,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:33,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:34,083 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2021-11-23 17:24:34,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:34,150 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:34,437 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_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2021-11-23 17:24:34,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:34,483 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:34,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34 WrapperNode [2021-11-23 17:24:34,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:34,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:34,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:34,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:34,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,692 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2021-11-23 17:24:34,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:34,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:34,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:34,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:34,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:34,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:34,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:34,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:34,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (1/1) ... [2021-11-23 17:24:34,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:34,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:34,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:34,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:35,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:24:35,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:35,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:35,163 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:35,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:38,148 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:38,171 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:24:38,171 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:24:38,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:38 BoogieIcfgContainer [2021-11-23 17:24:38,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:24:38,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:24:38,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:24:38,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:24:38,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:24:33" (1/3) ... [2021-11-23 17:24:38,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96deb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:38, skipping insertion in model container [2021-11-23 17:24:38,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:34" (2/3) ... [2021-11-23 17:24:38,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96deb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:38, skipping insertion in model container [2021-11-23 17:24:38,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:38" (3/3) ... [2021-11-23 17:24:38,186 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2021-11-23 17:24:38,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:24:38,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:24:38,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:24:38,284 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 17:24:38,284 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:24:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 17:24:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-23 17:24:38,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:38,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:24:38,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash -590757190, now seen corresponding path program 1 times [2021-11-23 17:24:38,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:38,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497084826] [2021-11-23 17:24:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:38,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:38,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:38,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:24:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:24:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:56,581 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 17:24:56,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:56,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497084826] [2021-11-23 17:24:56,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497084826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:56,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:56,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:24:56,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110969659] [2021-11-23 17:24:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:24:56,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:24:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:24:56,628 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 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 17:25:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:01,745 INFO L93 Difference]: Finished difference Result 718 states and 1265 transitions. [2021-11-23 17:25:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 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 166 [2021-11-23 17:25:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:01,763 INFO L225 Difference]: With dead ends: 718 [2021-11-23 17:25:01,763 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 17:25:01,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:25:01,772 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 431 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:01,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 464 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:25:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 17:25:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 17:25:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.4586894586894588) internal successors, (512), 351 states have internal predecessors, (512), 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 17:25:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 512 transitions. [2021-11-23 17:25:01,841 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 512 transitions. Word has length 166 [2021-11-23 17:25:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:01,843 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 512 transitions. [2021-11-23 17:25:01,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.444444444444443) internal successors, (166), 8 states have internal predecessors, (166), 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 17:25:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 512 transitions. [2021-11-23 17:25:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 17:25:01,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:01,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:01,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:02,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 560447781, now seen corresponding path program 1 times [2021-11-23 17:25:02,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958860500] [2021-11-23 17:25:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:02,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:02,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:02,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:02,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:25:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:25:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:21,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:21,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:21,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958860500] [2021-11-23 17:25:21,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958860500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:21,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:21,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:25:21,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455688408] [2021-11-23 17:25:21,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:21,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:25:21,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:25:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:21,221 INFO L87 Difference]: Start difference. First operand 352 states and 512 transitions. Second operand has 10 states, 10 states have (on average 17.3) internal successors, (173), 9 states have internal predecessors, (173), 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 17:25:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:26,831 INFO L93 Difference]: Finished difference Result 730 states and 1182 transitions. [2021-11-23 17:25:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.3) internal successors, (173), 9 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-23 17:25:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:26,838 INFO L225 Difference]: With dead ends: 730 [2021-11-23 17:25:26,839 INFO L226 Difference]: Without dead ends: 493 [2021-11-23 17:25:26,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:25:26,842 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 292 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:26,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 379 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 17:25:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-23 17:25:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2021-11-23 17:25:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.339430894308943) internal successors, (659), 492 states have internal predecessors, (659), 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 17:25:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 659 transitions. [2021-11-23 17:25:26,885 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 659 transitions. Word has length 173 [2021-11-23 17:25:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:26,887 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 659 transitions. [2021-11-23 17:25:26,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.3) internal successors, (173), 9 states have internal predecessors, (173), 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 17:25:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 659 transitions. [2021-11-23 17:25:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:25:26,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:26,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:26,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:27,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1992242044, now seen corresponding path program 1 times [2021-11-23 17:25:27,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282743768] [2021-11-23 17:25:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:27,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:27,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:27,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:25:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:27,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:25:27,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:27,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:27,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282743768] [2021-11-23 17:25:27,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282743768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:27,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:27,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:27,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099000929] [2021-11-23 17:25:27,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:27,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:27,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:27,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:27,758 INFO L87 Difference]: Start difference. First operand 493 states and 659 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 17:25:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:29,213 INFO L93 Difference]: Finished difference Result 948 states and 1410 transitions. [2021-11-23 17:25:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2021-11-23 17:25:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:29,220 INFO L225 Difference]: With dead ends: 948 [2021-11-23 17:25:29,220 INFO L226 Difference]: Without dead ends: 711 [2021-11-23 17:25:29,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 17:25:29,223 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 120 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:29,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 286 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:25:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-11-23 17:25:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 710. [2021-11-23 17:25:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.3469675599435824) internal successors, (955), 709 states have internal predecessors, (955), 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 17:25:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 955 transitions. [2021-11-23 17:25:29,273 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 955 transitions. Word has length 181 [2021-11-23 17:25:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:29,274 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 955 transitions. [2021-11-23 17:25:29,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 17:25:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 955 transitions. [2021-11-23 17:25:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 17:25:29,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:29,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:29,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:29,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 366566800, now seen corresponding path program 1 times [2021-11-23 17:25:29,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:29,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479387540] [2021-11-23 17:25:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:29,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:29,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:29,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:25:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:25:29,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:29,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479387540] [2021-11-23 17:25:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479387540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:29,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:29,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334461150] [2021-11-23 17:25:29,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:29,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:29,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:29,968 INFO L87 Difference]: Start difference. First operand 710 states and 955 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 17:25:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:31,648 INFO L93 Difference]: Finished difference Result 1575 states and 2272 transitions. [2021-11-23 17:25:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 187 [2021-11-23 17:25:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:31,657 INFO L225 Difference]: With dead ends: 1575 [2021-11-23 17:25:31,658 INFO L226 Difference]: Without dead ends: 1121 [2021-11-23 17:25:31,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 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 17:25:31,660 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 235 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:31,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 327 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:25:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-23 17:25:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1118. [2021-11-23 17:25:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 1.288272157564906) internal successors, (1439), 1117 states have internal predecessors, (1439), 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 17:25:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1439 transitions. [2021-11-23 17:25:31,699 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1439 transitions. Word has length 187 [2021-11-23 17:25:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:31,700 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1439 transitions. [2021-11-23 17:25:31,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 17:25:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1439 transitions. [2021-11-23 17:25:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 17:25:31,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:31,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:31,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:31,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -172091214, now seen corresponding path program 1 times [2021-11-23 17:25:31,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:31,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781279167] [2021-11-23 17:25:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:31,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:31,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:25:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 17:25:32,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:32,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:32,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781279167] [2021-11-23 17:25:32,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781279167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:32,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:32,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:32,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407340655] [2021-11-23 17:25:32,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:32,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:32,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:32,550 INFO L87 Difference]: Start difference. First operand 1118 states and 1439 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 17:25:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:33,557 INFO L93 Difference]: Finished difference Result 1957 states and 2578 transitions. [2021-11-23 17:25:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 207 [2021-11-23 17:25:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:33,566 INFO L225 Difference]: With dead ends: 1957 [2021-11-23 17:25:33,566 INFO L226 Difference]: Without dead ends: 1095 [2021-11-23 17:25:33,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 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 17:25:33,571 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:33,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 17:25:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-23 17:25:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1095. [2021-11-23 17:25:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.2312614259597807) internal successors, (1347), 1094 states have internal predecessors, (1347), 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 17:25:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1347 transitions. [2021-11-23 17:25:33,612 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1347 transitions. Word has length 207 [2021-11-23 17:25:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:33,612 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1347 transitions. [2021-11-23 17:25:33,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 17:25:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1347 transitions. [2021-11-23 17:25:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 17:25:33,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:33,619 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:33,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:33,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:33,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1633397323, now seen corresponding path program 1 times [2021-11-23 17:25:33,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483766199] [2021-11-23 17:25:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:33,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:33,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:33,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:25:34,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:34,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483766199] [2021-11-23 17:25:34,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483766199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:34,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:34,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:34,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427304479] [2021-11-23 17:25:34,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:34,544 INFO L87 Difference]: Start difference. First operand 1095 states and 1347 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 17:25:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:36,137 INFO L93 Difference]: Finished difference Result 2750 states and 3479 transitions. [2021-11-23 17:25:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 228 [2021-11-23 17:25:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:36,150 INFO L225 Difference]: With dead ends: 2750 [2021-11-23 17:25:36,150 INFO L226 Difference]: Without dead ends: 1911 [2021-11-23 17:25:36,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 225 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 17:25:36,153 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 598 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:36,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 52 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:25:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-11-23 17:25:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1907. [2021-11-23 17:25:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 1.2250786988457503) internal successors, (2335), 1906 states have internal predecessors, (2335), 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 17:25:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 2335 transitions. [2021-11-23 17:25:36,212 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 2335 transitions. Word has length 228 [2021-11-23 17:25:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:36,213 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 2335 transitions. [2021-11-23 17:25:36,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 17:25:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 2335 transitions. [2021-11-23 17:25:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-23 17:25:36,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:36,223 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:36,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:36,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:36,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2137668952, now seen corresponding path program 1 times [2021-11-23 17:25:36,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:36,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536340267] [2021-11-23 17:25:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:36,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:36,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:36,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:25:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 17:25:37,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:37,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536340267] [2021-11-23 17:25:37,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536340267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:37,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:37,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:37,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458615175] [2021-11-23 17:25:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:37,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:37,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:37,046 INFO L87 Difference]: Start difference. First operand 1907 states and 2335 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 17:25:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:38,449 INFO L93 Difference]: Finished difference Result 5189 states and 6446 transitions. [2021-11-23 17:25:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 268 [2021-11-23 17:25:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:38,471 INFO L225 Difference]: With dead ends: 5189 [2021-11-23 17:25:38,473 INFO L226 Difference]: Without dead ends: 3538 [2021-11-23 17:25:38,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 266 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 17:25:38,479 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 205 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:38,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 283 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:25:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-11-23 17:25:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 3534. [2021-11-23 17:25:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 1.2091706764789132) internal successors, (4272), 3533 states have internal predecessors, (4272), 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 17:25:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 4272 transitions. [2021-11-23 17:25:38,580 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 4272 transitions. Word has length 268 [2021-11-23 17:25:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 3534 states and 4272 transitions. [2021-11-23 17:25:38,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 17:25:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 4272 transitions. [2021-11-23 17:25:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 17:25:38,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:38,595 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:38,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:38,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:38,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1613230492, now seen corresponding path program 1 times [2021-11-23 17:25:38,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:38,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198882391] [2021-11-23 17:25:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:38,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:38,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:38,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:25:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:25:39,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:39,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:39,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198882391] [2021-11-23 17:25:39,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198882391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:39,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:39,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526715613] [2021-11-23 17:25:39,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:39,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:39,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:39,544 INFO L87 Difference]: Start difference. First operand 3534 states and 4272 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 2 states have internal predecessors, (270), 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 17:25:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:40,882 INFO L93 Difference]: Finished difference Result 8436 states and 10472 transitions. [2021-11-23 17:25:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 2 states have internal predecessors, (270), 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 274 [2021-11-23 17:25:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:40,910 INFO L225 Difference]: With dead ends: 8436 [2021-11-23 17:25:40,910 INFO L226 Difference]: Without dead ends: 5158 [2021-11-23 17:25:40,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 272 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 17:25:40,916 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 113 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:40,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 222 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:25:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-23 17:25:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5158. [2021-11-23 17:25:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 5157 states have (on average 1.1696722900911383) internal successors, (6032), 5157 states have internal predecessors, (6032), 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 17:25:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 6032 transitions. [2021-11-23 17:25:41,042 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 6032 transitions. Word has length 274 [2021-11-23 17:25:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:41,043 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 6032 transitions. [2021-11-23 17:25:41,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 2 states have internal predecessors, (270), 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 17:25:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 6032 transitions. [2021-11-23 17:25:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 17:25:41,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:41,058 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:41,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:41,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:41,271 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1403096447, now seen corresponding path program 1 times [2021-11-23 17:25:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620212095] [2021-11-23 17:25:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:41,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:41,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:41,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:25:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:25:42,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:42,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620212095] [2021-11-23 17:25:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620212095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:42,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:42,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:42,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293573059] [2021-11-23 17:25:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:42,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:42,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:42,242 INFO L87 Difference]: Start difference. First operand 5158 states and 6032 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 17:25:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:43,746 INFO L93 Difference]: Finished difference Result 12094 states and 14286 transitions. [2021-11-23 17:25:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 274 [2021-11-23 17:25:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:43,788 INFO L225 Difference]: With dead ends: 12094 [2021-11-23 17:25:43,788 INFO L226 Difference]: Without dead ends: 7192 [2021-11-23 17:25:43,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 272 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 17:25:43,795 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 119 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:43,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 241 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:25:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7192 states. [2021-11-23 17:25:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7192 to 7188. [2021-11-23 17:25:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 1.1522192848198136) internal successors, (8281), 7187 states have internal predecessors, (8281), 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 17:25:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 8281 transitions. [2021-11-23 17:25:43,971 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 8281 transitions. Word has length 274 [2021-11-23 17:25:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:43,972 INFO L470 AbstractCegarLoop]: Abstraction has 7188 states and 8281 transitions. [2021-11-23 17:25:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 17:25:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 8281 transitions. [2021-11-23 17:25:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-23 17:25:43,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:43,991 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:44,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:44,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:44,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2045324783, now seen corresponding path program 1 times [2021-11-23 17:25:44,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:44,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963634190] [2021-11-23 17:25:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:44,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:44,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:44,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:25:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 17:25:45,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:45,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963634190] [2021-11-23 17:25:45,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963634190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:45,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:45,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:45,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583141738] [2021-11-23 17:25:45,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:45,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:45,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:45,030 INFO L87 Difference]: Start difference. First operand 7188 states and 8281 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 17:25:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:46,523 INFO L93 Difference]: Finished difference Result 18183 states and 20976 transitions. [2021-11-23 17:25:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 308 [2021-11-23 17:25:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:46,572 INFO L225 Difference]: With dead ends: 18183 [2021-11-23 17:25:46,572 INFO L226 Difference]: Without dead ends: 11251 [2021-11-23 17:25:46,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 306 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 17:25:46,582 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 220 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:46,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 261 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:25:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11251 states. [2021-11-23 17:25:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 11248. [2021-11-23 17:25:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11248 states, 11247 states have (on average 1.1220769983106607) internal successors, (12620), 11247 states have internal predecessors, (12620), 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 17:25:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11248 states to 11248 states and 12620 transitions. [2021-11-23 17:25:46,915 INFO L78 Accepts]: Start accepts. Automaton has 11248 states and 12620 transitions. Word has length 308 [2021-11-23 17:25:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 11248 states and 12620 transitions. [2021-11-23 17:25:46,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 17:25:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11248 states and 12620 transitions. [2021-11-23 17:25:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-23 17:25:46,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:46,939 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:25:46,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 17:25:47,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:47,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -661724984, now seen corresponding path program 1 times [2021-11-23 17:25:47,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555135689] [2021-11-23 17:25:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:47,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:47,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:47,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:25:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:25:48,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:48,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555135689] [2021-11-23 17:25:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555135689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:48,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:48,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425045669] [2021-11-23 17:25:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:48,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:48,234 INFO L87 Difference]: Start difference. First operand 11248 states and 12620 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 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 17:25:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:49,551 INFO L93 Difference]: Finished difference Result 24272 states and 27124 transitions. [2021-11-23 17:25:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 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 309 [2021-11-23 17:25:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:49,586 INFO L225 Difference]: With dead ends: 24272 [2021-11-23 17:25:49,586 INFO L226 Difference]: Without dead ends: 13280 [2021-11-23 17:25:49,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 307 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 17:25:49,596 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 112 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:49,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 221 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 17:25:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13280 states. [2021-11-23 17:25:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13280 to 13278. [2021-11-23 17:25:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13278 states, 13277 states have (on average 1.1119981923627325) internal successors, (14764), 13277 states have internal predecessors, (14764), 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 17:25:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13278 states to 13278 states and 14764 transitions. [2021-11-23 17:25:49,840 INFO L78 Accepts]: Start accepts. Automaton has 13278 states and 14764 transitions. Word has length 309 [2021-11-23 17:25:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:49,840 INFO L470 AbstractCegarLoop]: Abstraction has 13278 states and 14764 transitions. [2021-11-23 17:25:49,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 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 17:25:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13278 states and 14764 transitions. [2021-11-23 17:25:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-23 17:25:49,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:49,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:49,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:50,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:50,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:50,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1044487096, now seen corresponding path program 1 times [2021-11-23 17:25:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:50,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952834553] [2021-11-23 17:25:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:50,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:50,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:50,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:25:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:50,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:25:51,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:51,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952834553] [2021-11-23 17:25:51,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952834553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:51,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:51,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:51,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255753563] [2021-11-23 17:25:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:51,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:51,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:51,937 INFO L87 Difference]: Start difference. First operand 13278 states and 14764 transitions. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 17:25:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:54,691 INFO L93 Difference]: Finished difference Result 47460 states and 52896 transitions. [2021-11-23 17:25:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 317 [2021-11-23 17:25:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:54,764 INFO L225 Difference]: With dead ends: 47460 [2021-11-23 17:25:54,764 INFO L226 Difference]: Without dead ends: 34641 [2021-11-23 17:25:54,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 314 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 17:25:54,778 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 574 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:54,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 103 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:25:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34641 states. [2021-11-23 17:25:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34641 to 34635. [2021-11-23 17:25:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34635 states, 34634 states have (on average 1.1134723104463822) internal successors, (38564), 34634 states have internal predecessors, (38564), 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 17:25:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34635 states to 34635 states and 38564 transitions. [2021-11-23 17:25:55,442 INFO L78 Accepts]: Start accepts. Automaton has 34635 states and 38564 transitions. Word has length 317 [2021-11-23 17:25:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:55,443 INFO L470 AbstractCegarLoop]: Abstraction has 34635 states and 38564 transitions. [2021-11-23 17:25:55,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 17:25:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34635 states and 38564 transitions. [2021-11-23 17:25:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-23 17:25:55,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:55,480 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:55,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:55,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:55,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -548072803, now seen corresponding path program 1 times [2021-11-23 17:25:55,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8510709] [2021-11-23 17:25:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:55,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:55,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:55,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:25:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:56,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:25:56,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:56,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:56,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8510709] [2021-11-23 17:25:56,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8510709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:56,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:56,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:56,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587562397] [2021-11-23 17:25:56,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:56,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:56,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:56,501 INFO L87 Difference]: Start difference. First operand 34635 states and 38564 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 17:25:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:58,043 INFO L93 Difference]: Finished difference Result 72069 states and 80244 transitions. [2021-11-23 17:25:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 329 [2021-11-23 17:25:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:58,100 INFO L225 Difference]: With dead ends: 72069 [2021-11-23 17:25:58,100 INFO L226 Difference]: Without dead ends: 37893 [2021-11-23 17:25:58,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 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 17:25:58,213 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 199 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:58,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 285 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:25:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37893 states. [2021-11-23 17:25:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37893 to 37893. [2021-11-23 17:25:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37893 states, 37892 states have (on average 1.1078063971286816) internal successors, (41977), 37892 states have internal predecessors, (41977), 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 17:25:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37893 states to 37893 states and 41977 transitions. [2021-11-23 17:25:58,985 INFO L78 Accepts]: Start accepts. Automaton has 37893 states and 41977 transitions. Word has length 329 [2021-11-23 17:25:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:58,987 INFO L470 AbstractCegarLoop]: Abstraction has 37893 states and 41977 transitions. [2021-11-23 17:25:58,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 17:25:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37893 states and 41977 transitions. [2021-11-23 17:25:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-23 17:25:59,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:59,023 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:59,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:25:59,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:59,235 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 47184313, now seen corresponding path program 1 times [2021-11-23 17:25:59,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:59,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543637995] [2021-11-23 17:25:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:59,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:59,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:59,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:59,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:25:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-23 17:26:00,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:00,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:00,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543637995] [2021-11-23 17:26:00,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543637995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:00,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:00,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:26:00,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900092779] [2021-11-23 17:26:00,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:00,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:00,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:00,025 INFO L87 Difference]: Start difference. First operand 37893 states and 41977 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 17:26:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:01,407 INFO L93 Difference]: Finished difference Result 82233 states and 90791 transitions. [2021-11-23 17:26:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:01,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 342 [2021-11-23 17:26:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:01,470 INFO L225 Difference]: With dead ends: 82233 [2021-11-23 17:26:01,470 INFO L226 Difference]: Without dead ends: 44799 [2021-11-23 17:26:01,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 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 17:26:01,494 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 188 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:01,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 220 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 17:26:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44799 states. [2021-11-23 17:26:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44799 to 44795. [2021-11-23 17:26:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44795 states, 44794 states have (on average 1.1001473411617628) internal successors, (49280), 44794 states have internal predecessors, (49280), 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 17:26:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44795 states to 44795 states and 49280 transitions. [2021-11-23 17:26:02,652 INFO L78 Accepts]: Start accepts. Automaton has 44795 states and 49280 transitions. Word has length 342 [2021-11-23 17:26:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 44795 states and 49280 transitions. [2021-11-23 17:26:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 17:26:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 44795 states and 49280 transitions. [2021-11-23 17:26:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-23 17:26:02,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:02,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:02,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 17:26:02,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:02,936 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash -995678644, now seen corresponding path program 1 times [2021-11-23 17:26:02,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950071988] [2021-11-23 17:26:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:02,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:02,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:02,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:02,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:26:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 17:26:04,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:04,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950071988] [2021-11-23 17:26:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950071988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:04,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:04,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:04,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864531022] [2021-11-23 17:26:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:04,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:26:04,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:26:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:26:04,223 INFO L87 Difference]: Start difference. First operand 44795 states and 49280 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 17:26:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:06,393 INFO L93 Difference]: Finished difference Result 93824 states and 103565 transitions. [2021-11-23 17:26:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:26:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 360 [2021-11-23 17:26:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:06,454 INFO L225 Difference]: With dead ends: 93824 [2021-11-23 17:26:06,455 INFO L226 Difference]: Without dead ends: 49488 [2021-11-23 17:26:06,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 357 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 17:26:06,483 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 359 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:06,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 197 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 17:26:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49488 states. [2021-11-23 17:26:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49488 to 48449. [2021-11-23 17:26:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48449 states, 48448 states have (on average 1.0773200132100396) internal successors, (52194), 48448 states have internal predecessors, (52194), 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 17:26:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48449 states to 48449 states and 52194 transitions. [2021-11-23 17:26:07,393 INFO L78 Accepts]: Start accepts. Automaton has 48449 states and 52194 transitions. Word has length 360 [2021-11-23 17:26:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:07,393 INFO L470 AbstractCegarLoop]: Abstraction has 48449 states and 52194 transitions. [2021-11-23 17:26:07,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 17:26:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 48449 states and 52194 transitions. [2021-11-23 17:26:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-23 17:26:07,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:07,413 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:07,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 17:26:07,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:07,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 160528368, now seen corresponding path program 1 times [2021-11-23 17:26:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263427506] [2021-11-23 17:26:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:07,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:07,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:07,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:26:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:26:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 301 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:26:12,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 301 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:26:16,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263427506] [2021-11-23 17:26:16,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263427506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644576523] [2021-11-23 17:26:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:16,747 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:16,749 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:16,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:26:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:26:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 248 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:26:20,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 189 proven. 150 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:26:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1644576523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400650261] [2021-11-23 17:26:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:28,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:28,554 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:28,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:26:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:26:28,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 307 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:26:36,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 307 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:26:44,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400650261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:44,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:44,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 8, 5, 5] total 18 [2021-11-23 17:26:44,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035240074] [2021-11-23 17:26:44,662 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:44,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 17:26:44,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 17:26:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:26:44,666 INFO L87 Difference]: Start difference. First operand 48449 states and 52194 transitions. Second operand has 19 states, 19 states have (on average 60.421052631578945) internal successors, (1148), 18 states have internal predecessors, (1148), 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 17:27:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:07,320 INFO L93 Difference]: Finished difference Result 288229 states and 309865 transitions. [2021-11-23 17:27:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:27:07,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 60.421052631578945) internal successors, (1148), 18 states have internal predecessors, (1148), 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 381 [2021-11-23 17:27:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:07,645 INFO L225 Difference]: With dead ends: 288229 [2021-11-23 17:27:07,645 INFO L226 Difference]: Without dead ends: 236522 [2021-11-23 17:27:07,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2305 GetRequests, 2263 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 17:27:07,701 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 4667 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 14708 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 16144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 14708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:07,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4667 Valid, 599 Invalid, 16144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1436 Valid, 14708 Invalid, 0 Unknown, 0 Unchecked, 19.7s Time] [2021-11-23 17:27:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236522 states. [2021-11-23 17:27:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236522 to 212693. [2021-11-23 17:27:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212693 states, 212692 states have (on average 1.0679809301713274) internal successors, (227151), 212692 states have internal predecessors, (227151), 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 17:27:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212693 states to 212693 states and 227151 transitions. [2021-11-23 17:27:12,568 INFO L78 Accepts]: Start accepts. Automaton has 212693 states and 227151 transitions. Word has length 381 [2021-11-23 17:27:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:12,569 INFO L470 AbstractCegarLoop]: Abstraction has 212693 states and 227151 transitions. [2021-11-23 17:27:12,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.421052631578945) internal successors, (1148), 18 states have internal predecessors, (1148), 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 17:27:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 212693 states and 227151 transitions. [2021-11-23 17:27:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-23 17:27:12,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:12,632 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:12,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:12,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:13,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:13,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:13,248 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash -387143446, now seen corresponding path program 1 times [2021-11-23 17:27:13,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850245882] [2021-11-23 17:27:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:13,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:13,254 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:13,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:27:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:27:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 88 proven. 246 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:27:17,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 79 proven. 255 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:27:20,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850245882] [2021-11-23 17:27:20,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850245882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965205964] [2021-11-23 17:27:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:20,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:20,701 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:20,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:27:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:27:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 288 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:27:25,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 255 proven. 79 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:27:31,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965205964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413373524] [2021-11-23 17:27:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:31,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:31,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:31,386 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:31,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a32d2-7d6b-43fb-ad68-42ea2e7b3d9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:27:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 267 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 17:27:32,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 267 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-23 17:27:32,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413373524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:32,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:32,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 8, 4, 4] total 22 [2021-11-23 17:27:32,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762897668] [2021-11-23 17:27:32,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:32,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:27:32,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:32,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:27:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:27:32,879 INFO L87 Difference]: Start difference. First operand 212693 states and 227151 transitions. Second operand has 22 states, 22 states have (on average 72.4090909090909) internal successors, (1593), 22 states have internal predecessors, (1593), 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)