./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label37.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_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/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_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/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_6500082d-e0ed-4a06-8031-87acdef8a2dd/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 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:08:13,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:08:13,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:08:13,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:08:13,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:08:13,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:08:13,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:08:13,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:08:13,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:08:13,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:08:13,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:08:13,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:08:13,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:08:13,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:08:13,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:08:13,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:08:13,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:08:13,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:08:13,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:08:13,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:08:13,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:08:13,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:08:13,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:08:13,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:08:13,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:08:13,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:08:13,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:08:13,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:08:13,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:08:13,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:08:13,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:08:13,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:08:13,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:08:13,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:08:13,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:08:13,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:08:13,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:08:13,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:08:13,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:08:13,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:08:13,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:08:13,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:08:13,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:08:13,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:08:13,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:08:13,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:08:13,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:08:13,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:08:13,925 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:08:13,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:08:13,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:08:13,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:08:13,926 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:08:13,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:08:13,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:08:13,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:08:13,927 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:08:13,927 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:08:13,928 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:08:13,928 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:08:13,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:08:13,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:08:13,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:08:13,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:08:13,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:08:13,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:08:13,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:08:13,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:08:13,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:08:13,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:08:13,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:08:13,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:08:13,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:08:13,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:08:13,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:13,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:08:13,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:08:13,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:08:13,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:08:13,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:08:13,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:08:13,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:08:13,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:08:13,936 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 [2021-11-23 17:08:14,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:08:14,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:08:14,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:08:14,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:08:14,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:08:14,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-11-23 17:08:14,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/6701117d4/5908083c8d154b939a6213a159e8ad35/FLAG763492876 [2021-11-23 17:08:15,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:08:15,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-11-23 17:08:15,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/6701117d4/5908083c8d154b939a6213a159e8ad35/FLAG763492876 [2021-11-23 17:08:15,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/6701117d4/5908083c8d154b939a6213a159e8ad35 [2021-11-23 17:08:15,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:08:15,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:08:15,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:15,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:08:15,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:08:15,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:15" (1/1) ... [2021-11-23 17:08:15,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77628367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:15, skipping insertion in model container [2021-11-23 17:08:15,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:15" (1/1) ... [2021-11-23 17:08:15,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:08:15,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:08:16,297 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2021-11-23 17:08:17,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:17,520 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:08:17,552 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2021-11-23 17:08:18,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:18,416 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:08:18,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18 WrapperNode [2021-11-23 17:08:18,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:18,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:18,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:08:18,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:08:18,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:18,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:18,945 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-23 17:08:18,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:18,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:08:18,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:08:18,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:08:18,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:18,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:08:19,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:08:19,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:08:19,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:08:19,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:18" (1/1) ... [2021-11-23 17:08:19,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:08:19,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:08:19,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:08:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:08:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:08:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:08:19,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:08:19,517 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:08:19,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:08:25,078 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:08:25,218 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 17:08:25,230 INFO L158 Benchmark]: Toolchain (without parser) took 9485.23ms. Allocated memory was 92.3MB in the beginning and 411.0MB in the end (delta: 318.8MB). Free memory was 61.8MB in the beginning and 175.1MB in the end (delta: -113.2MB). Peak memory consumption was 227.9MB. Max. memory is 16.1GB. [2021-11-23 17:08:25,231 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:08:25,233 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2669.65ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 61.6MB in the beginning and 69.5MB in the end (delta: -7.9MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. [2021-11-23 17:08:25,234 INFO L158 Benchmark]: Boogie Procedure Inliner took 528.70ms. Allocated memory was 134.2MB in the beginning and 205.5MB in the end (delta: 71.3MB). Free memory was 69.5MB in the beginning and 95.2MB in the end (delta: -25.7MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-11-23 17:08:25,235 INFO L158 Benchmark]: Boogie Preprocessor took 378.24ms. Allocated memory is still 205.5MB. Free memory was 95.2MB in the beginning and 83.6MB in the end (delta: 11.6MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-11-23 17:08:25,237 INFO L158 Benchmark]: RCFGBuilder took 5899.18ms. Allocated memory was 205.5MB in the beginning and 411.0MB in the end (delta: 205.5MB). Free memory was 83.6MB in the beginning and 175.1MB in the end (delta: -91.5MB). Peak memory consumption was 138.4MB. Max. memory is 16.1GB. [2021-11-23 17:08:25,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2669.65ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 61.6MB in the beginning and 69.5MB in the end (delta: -7.9MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 528.70ms. Allocated memory was 134.2MB in the beginning and 205.5MB in the end (delta: 71.3MB). Free memory was 69.5MB in the beginning and 95.2MB in the end (delta: -25.7MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 378.24ms. Allocated memory is still 205.5MB. Free memory was 95.2MB in the beginning and 83.6MB in the end (delta: 11.6MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * RCFGBuilder took 5899.18ms. Allocated memory was 205.5MB in the beginning and 411.0MB in the end (delta: 205.5MB). Free memory was 83.6MB in the beginning and 175.1MB in the end (delta: -91.5MB). Peak memory consumption was 138.4MB. 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 17:08:25,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/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_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/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_6500082d-e0ed-4a06-8031-87acdef8a2dd/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 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:08:27,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:08:27,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:08:27,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:08:27,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:08:27,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:08:27,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:08:27,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:08:27,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:08:27,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:08:27,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:08:27,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:08:27,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:08:27,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:08:27,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:08:27,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:08:27,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:08:27,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:08:28,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:08:28,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:08:28,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:08:28,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:08:28,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:08:28,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:08:28,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:08:28,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:08:28,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:08:28,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:08:28,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:08:28,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:08:28,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:08:28,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:08:28,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:08:28,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:08:28,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:08:28,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:08:28,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:08:28,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:08:28,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:08:28,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:08:28,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:08:28,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:08:28,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:08:28,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:08:28,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:08:28,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:08:28,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:08:28,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:08:28,106 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:08:28,107 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:08:28,107 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:08:28,107 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:08:28,108 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:08:28,109 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:08:28,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:08:28,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:08:28,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:08:28,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:08:28,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:08:28,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:08:28,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:08:28,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:08:28,113 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:08:28,113 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:08:28,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:08:28,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:08:28,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:08:28,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:08:28,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:08:28,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:08:28,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:08:28,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:28,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:08:28,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:08:28,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:08:28,117 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:08:28,117 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:28,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:08:28,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:08:28,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:08:28,119 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 [2021-11-23 17:08:28,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:08:28,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:08:28,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:08:28,569 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:08:28,569 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:08:28,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-11-23 17:08:28,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/da0d791d3/e732019c2a4549d9a48f34f19c99a09a/FLAG49adc5896 [2021-11-23 17:08:29,718 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:08:29,719 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-11-23 17:08:29,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/da0d791d3/e732019c2a4549d9a48f34f19c99a09a/FLAG49adc5896 [2021-11-23 17:08:30,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/data/da0d791d3/e732019c2a4549d9a48f34f19c99a09a [2021-11-23 17:08:30,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:08:30,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:08:30,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:30,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:08:30,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:08:30,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:30" (1/1) ... [2021-11-23 17:08:30,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704f0df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:30, skipping insertion in model container [2021-11-23 17:08:30,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:08:30" (1/1) ... [2021-11-23 17:08:30,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:08:30,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:08:30,528 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2021-11-23 17:08:31,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:31,854 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:08:31,888 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_6500082d-e0ed-4a06-8031-87acdef8a2dd/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2021-11-23 17:08:32,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:08:32,602 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:08:32,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32 WrapperNode [2021-11-23 17:08:32,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:08:32,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:32,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:08:32,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:08:32,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:32,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:32,961 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4752 [2021-11-23 17:08:32,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:08:32,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:08:32,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:08:32,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:08:33,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:08:33,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:08:33,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:08:33,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:08:33,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (1/1) ... [2021-11-23 17:08:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:08:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:08:33,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:08:33,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:08:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:08:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:08:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:08:33,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:08:33,681 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:08:33,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:09:04,964 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:09:04,992 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:09:04,992 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:09:04,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:09:04 BoogieIcfgContainer [2021-11-23 17:09:04,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:09:04,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:09:05,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:09:05,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:09:05,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:08:30" (1/3) ... [2021-11-23 17:09:05,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35de0f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:09:05, skipping insertion in model container [2021-11-23 17:09:05,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:08:32" (2/3) ... [2021-11-23 17:09:05,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35de0f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:09:05, skipping insertion in model container [2021-11-23 17:09:05,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:09:04" (3/3) ... [2021-11-23 17:09:05,007 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2021-11-23 17:09:05,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:09:05,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:09:05,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:09:05,098 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 17:09:05,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:09:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:09:05,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:05,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:05,169 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-11-23 17:09:05,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394263079] [2021-11-23 17:09:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:05,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:05,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:05,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:09:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:09:05,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:05,423 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 17:09:05,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:05,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394263079] [2021-11-23 17:09:05,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394263079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:05,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:09:05,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:09:05,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072091866] [2021-11-23 17:09:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:05,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:09:05,473 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17:09:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:45,393 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-23 17:09:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:09:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2021-11-23 17:09:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:45,438 INFO L225 Difference]: With dead ends: 2388 [2021-11-23 17:09:45,438 INFO L226 Difference]: Without dead ends: 1506 [2021-11-23 17:09:45,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 17:09:45,453 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 789 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:45,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 270 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 39.7s Time] [2021-11-23 17:09:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-23 17:09:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-23 17:09:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.7740863787375416) internal successors, (2670), 1505 states have internal predecessors, (2670), 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 17:09:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2670 transitions. [2021-11-23 17:09:45,618 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2670 transitions. Word has length 13 [2021-11-23 17:09:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:45,619 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2670 transitions. [2021-11-23 17:09:45,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17:09:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2670 transitions. [2021-11-23 17:09:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 17:09:45,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:45,624 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:09:45,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:09:45,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 37688972, now seen corresponding path program 1 times [2021-11-23 17:09:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:45,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542887287] [2021-11-23 17:09:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:45,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:45,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:45,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:45,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:09:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:09:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:46,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:46,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542887287] [2021-11-23 17:09:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542887287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:46,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:09:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:09:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349780701] [2021-11-23 17:09:46,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:46,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:46,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:09:46,335 INFO L87 Difference]: Start difference. First operand 1506 states and 2670 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 17:10:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:25,940 INFO L93 Difference]: Finished difference Result 4514 states and 8006 transitions. [2021-11-23 17:10:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:10:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 78 [2021-11-23 17:10:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:25,971 INFO L225 Difference]: With dead ends: 4514 [2021-11-23 17:10:25,972 INFO L226 Difference]: Without dead ends: 3010 [2021-11-23 17:10:25,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 17:10:25,976 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 926 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:25,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 39.5s Time] [2021-11-23 17:10:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-11-23 17:10:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2021-11-23 17:10:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.583305620219488) internal successors, (4761), 3007 states have internal predecessors, (4761), 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 17:10:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4761 transitions. [2021-11-23 17:10:26,106 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4761 transitions. Word has length 78 [2021-11-23 17:10:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:26,107 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4761 transitions. [2021-11-23 17:10:26,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 17:10:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4761 transitions. [2021-11-23 17:10:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 17:10:26,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:26,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:26,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:10:26,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2103331323, now seen corresponding path program 1 times [2021-11-23 17:10:26,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604536501] [2021-11-23 17:10:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:26,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:26,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:26,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:26,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:10:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:26,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:10:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:26,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:10:26,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604536501] [2021-11-23 17:10:26,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604536501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:10:26,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:10:26,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:10:26,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129718783] [2021-11-23 17:10:26,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:10:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:10:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:10:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:10:26,587 INFO L87 Difference]: Start difference. First operand 3008 states and 4761 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:05,521 INFO L93 Difference]: Finished difference Result 9018 states and 14278 transitions. [2021-11-23 17:11:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:11:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-23 17:11:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:05,564 INFO L225 Difference]: With dead ends: 9018 [2021-11-23 17:11:05,564 INFO L226 Difference]: Without dead ends: 4510 [2021-11-23 17:11:05,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 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 17:11:05,571 INFO L933 BasicCegarLoop]: 1346 mSDtfsCounter, 794 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:05,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 38.8s Time] [2021-11-23 17:11:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-23 17:11:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-23 17:11:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.388999778221335) internal successors, (6263), 4509 states have internal predecessors, (6263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6263 transitions. [2021-11-23 17:11:05,687 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6263 transitions. Word has length 84 [2021-11-23 17:11:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6263 transitions. [2021-11-23 17:11:05,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6263 transitions. [2021-11-23 17:11:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:11:05,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:05,693 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:11:05,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:05,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:05,908 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash -342204051, now seen corresponding path program 1 times [2021-11-23 17:11:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270195400] [2021-11-23 17:11:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:05,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:05,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:05,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:11:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:11:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:08,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:08,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270195400] [2021-11-23 17:11:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270195400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:08,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:11:08,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:11:08,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079515509] [2021-11-23 17:11:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:08,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:11:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:11:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:11:08,114 INFO L87 Difference]: Start difference. First operand 4510 states and 6263 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:44,420 INFO L93 Difference]: Finished difference Result 9799 states and 13478 transitions. [2021-11-23 17:11:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:11:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-23 17:11:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:44,460 INFO L225 Difference]: With dead ends: 9799 [2021-11-23 17:11:44,460 INFO L226 Difference]: Without dead ends: 5291 [2021-11-23 17:11:44,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:11:44,467 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 1346 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:44,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 711 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 36.1s Time] [2021-11-23 17:11:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-11-23 17:11:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5261. [2021-11-23 17:11:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.3344106463878327) internal successors, (7019), 5260 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7019 transitions. [2021-11-23 17:11:44,592 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7019 transitions. Word has length 104 [2021-11-23 17:11:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:44,593 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7019 transitions. [2021-11-23 17:11:44,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7019 transitions. [2021-11-23 17:11:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 17:11:44,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:44,597 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:11:44,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:44,810 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1005399562, now seen corresponding path program 1 times [2021-11-23 17:11:44,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793750273] [2021-11-23 17:11:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:44,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:44,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:11:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:11:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:45,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:46,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793750273] [2021-11-23 17:11:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793750273] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:11:46,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:11:46,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:11:46,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63609115] [2021-11-23 17:11:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:46,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:11:46,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:11:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:11:46,550 INFO L87 Difference]: Start difference. First operand 5261 states and 7019 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:46,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:48,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:14:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:30,288 INFO L93 Difference]: Finished difference Result 14275 states and 19540 transitions. [2021-11-23 17:14:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-23 17:14:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:30,345 INFO L225 Difference]: With dead ends: 14275 [2021-11-23 17:14:30,345 INFO L226 Difference]: Without dead ends: 9767 [2021-11-23 17:14:30,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:14:30,352 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 819 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 789 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:30,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 868 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 2350 Invalid, 1 Unknown, 0 Unchecked, 163.6s Time] [2021-11-23 17:14:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-23 17:14:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-23 17:14:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3358591030104443) internal successors, (13046), 9766 states have internal predecessors, (13046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13046 transitions. [2021-11-23 17:14:30,574 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13046 transitions. Word has length 154 [2021-11-23 17:14:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:30,576 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 13046 transitions. [2021-11-23 17:14:30,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13046 transitions. [2021-11-23 17:14:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-23 17:14:30,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:30,586 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:30,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:14:30,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:30,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -518830816, now seen corresponding path program 1 times [2021-11-23 17:14:30,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041654932] [2021-11-23 17:14:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:30,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:30,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:30,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:14:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 17:14:31,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:31,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041654932] [2021-11-23 17:14:31,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041654932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:31,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:31,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:31,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774921456] [2021-11-23 17:14:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:31,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:31,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:31,523 INFO L87 Difference]: Start difference. First operand 9767 states and 13046 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:13,259 INFO L93 Difference]: Finished difference Result 24789 states and 34299 transitions. [2021-11-23 17:15:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 253 [2021-11-23 17:15:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:13,325 INFO L225 Difference]: With dead ends: 24789 [2021-11-23 17:15:13,325 INFO L226 Difference]: Without dead ends: 15775 [2021-11-23 17:15:13,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:13,337 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 748 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:13,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1355 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 41.5s Time] [2021-11-23 17:15:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-11-23 17:15:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2021-11-23 17:15:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2643590718904527) internal successors, (19944), 15774 states have internal predecessors, (19944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19944 transitions. [2021-11-23 17:15:13,642 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19944 transitions. Word has length 253 [2021-11-23 17:15:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:13,643 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19944 transitions. [2021-11-23 17:15:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19944 transitions. [2021-11-23 17:15:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-23 17:15:13,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:13,650 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:15:13,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:13,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:13,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -879499859, now seen corresponding path program 1 times [2021-11-23 17:15:13,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801522143] [2021-11-23 17:15:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:13,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:13,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:13,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:15:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 21 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:15,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:16,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801522143] [2021-11-23 17:15:16,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801522143] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:15:16,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:15:16,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:15:16,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375591449] [2021-11-23 17:15:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:16,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:16,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:16,372 INFO L87 Difference]: Start difference. First operand 15775 states and 19944 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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 17:15:35,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:55,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:57,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:06,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:20,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:26,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:44,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:07,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:12,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:17:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:43,707 INFO L93 Difference]: Finished difference Result 44315 states and 56627 transitions. [2021-11-23 17:17:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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 271 [2021-11-23 17:17:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:43,774 INFO L225 Difference]: With dead ends: 44315 [2021-11-23 17:17:43,774 INFO L226 Difference]: Without dead ends: 29293 [2021-11-23 17:17:43,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:43,794 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 707 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:43,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 441 Invalid, 3068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 147.1s Time] [2021-11-23 17:17:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2021-11-23 17:17:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 29293. [2021-11-23 17:17:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29293 states, 29292 states have (on average 1.2514338385907415) internal successors, (36657), 29292 states have internal predecessors, (36657), 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 17:17:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29293 states to 29293 states and 36657 transitions. [2021-11-23 17:17:44,353 INFO L78 Accepts]: Start accepts. Automaton has 29293 states and 36657 transitions. Word has length 271 [2021-11-23 17:17:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:44,354 INFO L470 AbstractCegarLoop]: Abstraction has 29293 states and 36657 transitions. [2021-11-23 17:17:44,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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 17:17:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29293 states and 36657 transitions. [2021-11-23 17:17:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-23 17:17:44,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:44,360 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:17:44,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:44,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:44,572 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:44,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1640314461, now seen corresponding path program 1 times [2021-11-23 17:17:44,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:44,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689744689] [2021-11-23 17:17:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:44,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:44,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:44,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:17:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-23 17:17:45,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:45,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689744689] [2021-11-23 17:17:45,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689744689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:45,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:45,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:17:45,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862988970] [2021-11-23 17:17:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:45,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:45,409 INFO L87 Difference]: Start difference. First operand 29293 states and 36657 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:27,794 INFO L93 Difference]: Finished difference Result 69098 states and 89004 transitions. [2021-11-23 17:18:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 275 [2021-11-23 17:18:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:27,895 INFO L225 Difference]: With dead ends: 69098 [2021-11-23 17:18:27,895 INFO L226 Difference]: Without dead ends: 40558 [2021-11-23 17:18:27,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 273 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 17:18:27,930 INFO L933 BasicCegarLoop]: 1418 mSDtfsCounter, 742 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:27,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1426 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 42.0s Time] [2021-11-23 17:18:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40558 states. [2021-11-23 17:18:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40558 to 40558. [2021-11-23 17:18:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40558 states, 40557 states have (on average 1.208545996991888) internal successors, (49015), 40557 states have internal predecessors, (49015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 49015 transitions. [2021-11-23 17:18:28,724 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 49015 transitions. Word has length 275 [2021-11-23 17:18:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 40558 states and 49015 transitions. [2021-11-23 17:18:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 49015 transitions. [2021-11-23 17:18:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-23 17:18:28,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:28,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:28,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:18:28,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:28,953 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1690546349, now seen corresponding path program 1 times [2021-11-23 17:18:28,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709219003] [2021-11-23 17:18:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:28,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:28,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:28,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:18:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:18:30,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:30,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709219003] [2021-11-23 17:18:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709219003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:30,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:30,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525959146] [2021-11-23 17:18:30,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:30,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:30,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:30,603 INFO L87 Difference]: Start difference. First operand 40558 states and 49015 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:07,644 INFO L93 Difference]: Finished difference Result 110403 states and 134071 transitions. [2021-11-23 17:19:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2021-11-23 17:19:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:07,888 INFO L225 Difference]: With dead ends: 110403 [2021-11-23 17:19:07,889 INFO L226 Difference]: Without dead ends: 70598 [2021-11-23 17:19:07,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:07,949 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 613 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:07,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 477 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 36.6s Time] [2021-11-23 17:19:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70598 states. [2021-11-23 17:19:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70598 to 68345. [2021-11-23 17:19:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68345 states, 68344 states have (on average 1.1601164696242539) internal successors, (79287), 68344 states have internal predecessors, (79287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68345 states to 68345 states and 79287 transitions. [2021-11-23 17:19:09,464 INFO L78 Accepts]: Start accepts. Automaton has 68345 states and 79287 transitions. Word has length 346 [2021-11-23 17:19:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:09,472 INFO L470 AbstractCegarLoop]: Abstraction has 68345 states and 79287 transitions. [2021-11-23 17:19:09,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 68345 states and 79287 transitions. [2021-11-23 17:19:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-11-23 17:19:09,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:09,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:09,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:09,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:09,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1195285460, now seen corresponding path program 1 times [2021-11-23 17:19:09,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:09,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216674394] [2021-11-23 17:19:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:09,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:09,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:09,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:19:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:19:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 17:19:11,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:11,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216674394] [2021-11-23 17:19:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216674394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:11,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:11,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:19:11,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064613573] [2021-11-23 17:19:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:11,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:11,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:11,147 INFO L87 Difference]: Start difference. First operand 68345 states and 79287 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:48,815 INFO L93 Difference]: Finished difference Result 149455 states and 176579 transitions. [2021-11-23 17:19:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:48,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 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 370 [2021-11-23 17:19:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:48,936 INFO L225 Difference]: With dead ends: 149455 [2021-11-23 17:19:48,936 INFO L226 Difference]: Without dead ends: 81863 [2021-11-23 17:19:48,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:48,981 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 646 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:48,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 555 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 37.1s Time] [2021-11-23 17:19:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81863 states. [2021-11-23 17:19:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81863 to 81112. [2021-11-23 17:19:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81112 states, 81111 states have (on average 1.1442221153727608) internal successors, (92809), 81111 states have internal predecessors, (92809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81112 states to 81112 states and 92809 transitions. [2021-11-23 17:19:50,554 INFO L78 Accepts]: Start accepts. Automaton has 81112 states and 92809 transitions. Word has length 370 [2021-11-23 17:19:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:50,555 INFO L470 AbstractCegarLoop]: Abstraction has 81112 states and 92809 transitions. [2021-11-23 17:19:50,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 81112 states and 92809 transitions. [2021-11-23 17:19:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-23 17:19:50,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:50,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:50,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 17:19:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:50,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash -778756842, now seen corresponding path program 1 times [2021-11-23 17:19:50,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:50,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295895819] [2021-11-23 17:19:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:50,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:50,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:50,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:19:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:19:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 240 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:19:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:19:53,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295895819] [2021-11-23 17:19:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295895819] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:19:53,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:19:53,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:19:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897155687] [2021-11-23 17:19:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:19:53,559 INFO L87 Difference]: Start difference. First operand 81112 states and 92809 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:59,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:02,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:21,807 INFO L93 Difference]: Finished difference Result 186254 states and 213351 transitions. [2021-11-23 17:21:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 427 [2021-11-23 17:21:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:22,062 INFO L225 Difference]: With dead ends: 186254 [2021-11-23 17:21:22,062 INFO L226 Difference]: Without dead ends: 105895 [2021-11-23 17:21:22,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:22,149 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 718 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 550 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:22,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 571 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2336 Invalid, 1 Unknown, 0 Unchecked, 87.6s Time] [2021-11-23 17:21:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105895 states. [2021-11-23 17:21:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105895 to 104393. [2021-11-23 17:21:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104393 states, 104392 states have (on average 1.1316384397271821) internal successors, (118134), 104392 states have internal predecessors, (118134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104393 states to 104393 states and 118134 transitions. [2021-11-23 17:21:24,240 INFO L78 Accepts]: Start accepts. Automaton has 104393 states and 118134 transitions. Word has length 427 [2021-11-23 17:21:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:24,240 INFO L470 AbstractCegarLoop]: Abstraction has 104393 states and 118134 transitions. [2021-11-23 17:21:24,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 104393 states and 118134 transitions. [2021-11-23 17:21:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-11-23 17:21:24,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:24,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-23 17:21:24,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:24,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:24,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash 498709516, now seen corresponding path program 1 times [2021-11-23 17:21:24,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:24,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350716621] [2021-11-23 17:21:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:24,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:24,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:24,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6500082d-e0ed-4a06-8031-87acdef8a2dd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:21:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:24,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:24,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:21:25,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:25,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350716621] [2021-11-23 17:21:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350716621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:25,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:25,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:21:25,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795670333] [2021-11-23 17:21:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:25,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:25,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:25,780 INFO L87 Difference]: Start difference. First operand 104393 states and 118134 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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)