./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label39.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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:57:01,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:57:01,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:57:01,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:57:01,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:57:01,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:57:01,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:57:01,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:57:01,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:57:01,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:57:01,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:57:01,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:57:01,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:57:01,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:57:01,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:57:01,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:57:01,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:57:01,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:57:01,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:57:01,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:57:01,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:57:01,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:57:01,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:57:01,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:57:01,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:57:01,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:57:01,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:57:01,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:57:01,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:57:01,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:57:01,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:57:01,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:57:01,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:57:01,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:57:01,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:57:01,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:57:01,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:57:01,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:57:01,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:57:01,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:57:01,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:57:01,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:57:01,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:57:01,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:57:01,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:57:01,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:57:01,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:57:01,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:57:01,887 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:57:01,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:57:01,887 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:57:01,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:57:01,889 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:57:01,889 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:57:01,890 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:57:01,890 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:57:01,890 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:57:01,891 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:57:01,891 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:57:01,891 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:57:01,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:57:01,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:57:01,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:57:01,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:57:01,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:57:01,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:57:01,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:57:01,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:57:01,896 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:57:01,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:57:01,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:57:01,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:57:01,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:57:01,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:57:01,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:01,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:57:01,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:57:01,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:57:01,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:57:01,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:57:01,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:57:01,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:57:01,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:57:01,901 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 [2021-11-23 16:57:02,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:57:02,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:57:02,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:57:02,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:57:02,277 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:57:02,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-11-23 16:57:02,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/c4e8cb864/8a79e852ced848b1866c2c7c8caf53b6/FLAG1561759ae [2021-11-23 16:57:03,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:57:03,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-11-23 16:57:03,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/c4e8cb864/8a79e852ced848b1866c2c7c8caf53b6/FLAG1561759ae [2021-11-23 16:57:03,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/c4e8cb864/8a79e852ced848b1866c2c7c8caf53b6 [2021-11-23 16:57:03,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:57:03,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:57:03,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:03,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:57:03,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:57:03,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:03" (1/1) ... [2021-11-23 16:57:03,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7bdaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:03, skipping insertion in model container [2021-11-23 16:57:03,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:03" (1/1) ... [2021-11-23 16:57:03,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:57:04,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:57:04,560 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-11-23 16:57:06,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:06,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:57:06,081 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-11-23 16:57:06,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:07,023 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:57:07,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07 WrapperNode [2021-11-23 16:57:07,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:07,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:07,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:57:07,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:57:07,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:07,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:08,048 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 16:57:08,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:08,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:57:08,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:57:08,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:57:08,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:08,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:08,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:08,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:08,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:09,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:09,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:09,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:57:09,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:57:09,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:57:09,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:57:09,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:07" (1/1) ... [2021-11-23 16:57:09,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:09,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:57:09,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:57:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:57:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:57:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:57:09,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:57:09,449 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:57:09,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:57:17,046 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:57:17,120 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 16:57:17,128 INFO L158 Benchmark]: Toolchain (without parser) took 13301.37ms. Allocated memory was 90.2MB in the beginning and 931.1MB in the end (delta: 841.0MB). Free memory was 61.1MB in the beginning and 638.3MB in the end (delta: -577.2MB). Peak memory consumption was 386.1MB. Max. memory is 16.1GB. [2021-11-23 16:57:17,129 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 90.2MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:57:17,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3195.52ms. Allocated memory was 90.2MB in the beginning and 232.8MB in the end (delta: 142.6MB). Free memory was 60.8MB in the beginning and 157.7MB in the end (delta: -96.9MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. [2021-11-23 16:57:17,134 INFO L158 Benchmark]: Boogie Procedure Inliner took 1035.63ms. Allocated memory is still 232.8MB. Free memory was 157.7MB in the beginning and 101.1MB in the end (delta: 56.6MB). Peak memory consumption was 117.5MB. Max. memory is 16.1GB. [2021-11-23 16:57:17,136 INFO L158 Benchmark]: Boogie Preprocessor took 1180.54ms. Allocated memory was 232.8MB in the beginning and 465.6MB in the end (delta: 232.8MB). Free memory was 101.1MB in the beginning and 305.5MB in the end (delta: -204.3MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2021-11-23 16:57:17,137 INFO L158 Benchmark]: RCFGBuilder took 7878.81ms. Allocated memory was 465.6MB in the beginning and 931.1MB in the end (delta: 465.6MB). Free memory was 305.5MB in the beginning and 638.3MB in the end (delta: -332.8MB). Peak memory consumption was 257.5MB. Max. memory is 16.1GB. [2021-11-23 16:57:17,149 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 90.2MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3195.52ms. Allocated memory was 90.2MB in the beginning and 232.8MB in the end (delta: 142.6MB). Free memory was 60.8MB in the beginning and 157.7MB in the end (delta: -96.9MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 1035.63ms. Allocated memory is still 232.8MB. Free memory was 157.7MB in the beginning and 101.1MB in the end (delta: 56.6MB). Peak memory consumption was 117.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 1180.54ms. Allocated memory was 232.8MB in the beginning and 465.6MB in the end (delta: 232.8MB). Free memory was 101.1MB in the beginning and 305.5MB in the end (delta: -204.3MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * RCFGBuilder took 7878.81ms. Allocated memory was 465.6MB in the beginning and 931.1MB in the end (delta: 465.6MB). Free memory was 305.5MB in the beginning and 638.3MB in the end (delta: -332.8MB). Peak memory consumption was 257.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:57:17,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:57:20,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:57:20,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:57:20,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:57:20,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:57:20,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:57:20,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:57:20,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:57:20,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:57:20,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:57:20,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:57:20,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:57:20,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:57:20,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:57:20,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:57:20,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:57:20,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:57:20,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:57:20,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:57:20,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:57:20,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:57:20,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:57:20,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:57:20,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:57:20,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:57:20,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:57:20,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:57:20,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:57:20,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:57:20,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:57:20,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:57:20,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:57:20,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:57:20,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:57:20,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:57:20,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:57:20,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:57:20,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:57:20,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:57:20,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:57:20,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:57:20,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:57:20,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:57:20,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:57:20,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:57:20,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:57:20,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:57:20,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:57:20,464 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:57:20,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:57:20,465 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:57:20,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:57:20,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:57:20,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:57:20,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:57:20,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:57:20,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:57:20,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:57:20,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:57:20,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:57:20,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:57:20,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:57:20,469 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:57:20,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:57:20,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:57:20,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:57:20,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:57:20,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:57:20,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:57:20,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:57:20,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:57:20,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:20,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:57:20,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:57:20,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:57:20,472 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:57:20,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:20,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:57:20,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:57:20,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:57:20,474 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 458d694afbb3bfd6aed28352ce176f8d7e28b3da8c081e4ca83ee27f62e7ab73 [2021-11-23 16:57:20,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:57:20,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:57:20,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:57:20,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:57:20,978 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:57:20,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-11-23 16:57:21,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/0e75f8800/350b08ee8a694a899f51c3fcbec47526/FLAG495675b1a [2021-11-23 16:57:22,156 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:57:22,157 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2021-11-23 16:57:22,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/0e75f8800/350b08ee8a694a899f51c3fcbec47526/FLAG495675b1a [2021-11-23 16:57:22,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/data/0e75f8800/350b08ee8a694a899f51c3fcbec47526 [2021-11-23 16:57:22,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:57:22,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:57:22,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:22,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:57:22,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:57:22,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:22" (1/1) ... [2021-11-23 16:57:22,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46097e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:22, skipping insertion in model container [2021-11-23 16:57:22,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:22" (1/1) ... [2021-11-23 16:57:22,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:57:22,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:57:23,351 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-11-23 16:57:25,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:25,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:57:25,114 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_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2021-11-23 16:57:26,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:26,131 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:57:26,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26 WrapperNode [2021-11-23 16:57:26,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:26,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:26,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:57:26,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:57:26,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:26,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:26,630 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 16:57:26,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:26,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:57:26,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:57:26,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:57:26,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:26,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:26,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:26,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:27,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:27,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:27,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:27,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:57:27,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:57:27,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:57:27,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:57:27,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (1/1) ... [2021-11-23 16:57:27,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:27,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:57:27,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:57:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:57:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:57:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:57:27,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:57:27,479 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:57:27,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:25,362 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:25,393 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:58:25,394 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:58:25,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:25 BoogieIcfgContainer [2021-11-23 16:58:25,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:58:25,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:58:25,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:58:25,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:58:25,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:57:22" (1/3) ... [2021-11-23 16:58:25,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2de6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:25, skipping insertion in model container [2021-11-23 16:58:25,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:26" (2/3) ... [2021-11-23 16:58:25,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2de6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:25, skipping insertion in model container [2021-11-23 16:58:25,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:25" (3/3) ... [2021-11-23 16:58:25,410 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label39.c [2021-11-23 16:58:25,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:58:25,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:58:25,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:58:25,496 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 16:58:25,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:58:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 16:58:25,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:25,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:25,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2021-11-23 16:58:25,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:25,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364529793] [2021-11-23 16:58:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:25,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:25,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:25,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:58:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:58:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:26,105 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 16:58:26,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:26,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:26,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364529793] [2021-11-23 16:58:26,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364529793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:26,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:26,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:58:26,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421631601] [2021-11-23 16:58:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:26,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:58:26,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:58:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:58:26,174 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 16:59:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:30,691 INFO L93 Difference]: Finished difference Result 3072 states and 5735 transitions. [2021-11-23 16:59:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 51 [2021-11-23 16:59:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:30,737 INFO L225 Difference]: With dead ends: 3072 [2021-11-23 16:59:30,737 INFO L226 Difference]: Without dead ends: 1895 [2021-11-23 16:59:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 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 16:59:30,752 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 849 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:30,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 790 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 64.1s Time] [2021-11-23 16:59:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-23 16:59:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1838. [2021-11-23 16:59:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.6614044637996734) internal successors, (3052), 1837 states have internal predecessors, (3052), 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 16:59:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3052 transitions. [2021-11-23 16:59:30,931 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3052 transitions. Word has length 51 [2021-11-23 16:59:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:30,932 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3052 transitions. [2021-11-23 16:59:30,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 16:59:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3052 transitions. [2021-11-23 16:59:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:59:30,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:30,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:59:30,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:31,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:31,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:31,151 INFO L85 PathProgramCache]: Analyzing trace with hash 835742335, now seen corresponding path program 1 times [2021-11-23 16:59:31,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:31,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146345104] [2021-11-23 16:59:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:31,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:31,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:59:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:31,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:31,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:31,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146345104] [2021-11-23 16:59:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146345104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:31,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:31,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:59:31,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001484443] [2021-11-23 16:59:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:31,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:31,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:31,865 INFO L87 Difference]: Start difference. First operand 1838 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 17:00:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:47,386 INFO L93 Difference]: Finished difference Result 5269 states and 8800 transitions. [2021-11-23 17:00:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 117 [2021-11-23 17:00:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:47,422 INFO L225 Difference]: With dead ends: 5269 [2021-11-23 17:00:47,422 INFO L226 Difference]: Without dead ends: 3433 [2021-11-23 17:00:47,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 17:00:47,427 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 783 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:47,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1216 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 75.4s Time] [2021-11-23 17:00:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2021-11-23 17:00:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 3426. [2021-11-23 17:00:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 1.423941605839416) internal successors, (4877), 3425 states have internal predecessors, (4877), 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 17:00:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4877 transitions. [2021-11-23 17:00:47,528 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4877 transitions. Word has length 117 [2021-11-23 17:00:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:47,529 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4877 transitions. [2021-11-23 17:00:47,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 17:00:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4877 transitions. [2021-11-23 17:00:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 17:00:47,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:47,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 17:00:47,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:47,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:47,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1448942126, now seen corresponding path program 1 times [2021-11-23 17:00:47,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017489371] [2021-11-23 17:00:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:47,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:47,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:47,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:00:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:48,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:48,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:48,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017489371] [2021-11-23 17:00:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017489371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:48,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:48,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:48,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536650860] [2021-11-23 17:00:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:48,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:48,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:48,316 INFO L87 Difference]: Start difference. First operand 3426 states and 4877 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:52,808 INFO L93 Difference]: Finished difference Result 8486 states and 12577 transitions. [2021-11-23 17:01:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-23 17:01:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:52,854 INFO L225 Difference]: With dead ends: 8486 [2021-11-23 17:01:52,854 INFO L226 Difference]: Without dead ends: 5849 [2021-11-23 17:01:52,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:52,861 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 853 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:52,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1865 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 64.3s Time] [2021-11-23 17:01:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-11-23 17:01:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5831. [2021-11-23 17:01:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5831 states, 5830 states have (on average 1.3041166380789022) internal successors, (7603), 5830 states have internal predecessors, (7603), 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 17:01:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5831 states to 5831 states and 7603 transitions. [2021-11-23 17:01:53,017 INFO L78 Accepts]: Start accepts. Automaton has 5831 states and 7603 transitions. Word has length 124 [2021-11-23 17:01:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:53,018 INFO L470 AbstractCegarLoop]: Abstraction has 5831 states and 7603 transitions. [2021-11-23 17:01:53,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5831 states and 7603 transitions. [2021-11-23 17:01:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 17:01:53,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:53,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:01:53,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:53,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 237607147, now seen corresponding path program 1 times [2021-11-23 17:01:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:53,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675865219] [2021-11-23 17:01:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:53,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:53,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:53,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:53,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:01:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:53,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:53,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675865219] [2021-11-23 17:01:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675865219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:53,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:53,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053039596] [2021-11-23 17:01:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:53,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:53,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:53,920 INFO L87 Difference]: Start difference. First operand 5831 states and 7603 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 17:02:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:58,895 INFO L93 Difference]: Finished difference Result 13259 states and 17981 transitions. [2021-11-23 17:02:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 139 [2021-11-23 17:02:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:58,955 INFO L225 Difference]: With dead ends: 13259 [2021-11-23 17:02:58,955 INFO L226 Difference]: Without dead ends: 8217 [2021-11-23 17:02:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 17:02:58,965 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 835 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:58,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1887 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 64.8s Time] [2021-11-23 17:02:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2021-11-23 17:02:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 8213. [2021-11-23 17:02:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 1.251583049196298) internal successors, (10278), 8212 states have internal predecessors, (10278), 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 17:02:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 10278 transitions. [2021-11-23 17:02:59,188 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 10278 transitions. Word has length 139 [2021-11-23 17:02:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:59,191 INFO L470 AbstractCegarLoop]: Abstraction has 8213 states and 10278 transitions. [2021-11-23 17:02:59,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 17:02:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 10278 transitions. [2021-11-23 17:02:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 17:02:59,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:59,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:59,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:59,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:59,411 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1424320895, now seen corresponding path program 1 times [2021-11-23 17:02:59,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:59,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076943818] [2021-11-23 17:02:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:59,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:59,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:02:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:00,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:01,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076943818] [2021-11-23 17:03:01,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076943818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2134428705] [2021-11-23 17:03:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:01,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:01,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:03:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:01,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:01,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:01,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2134428705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:01,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:01,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:03:01,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403131278] [2021-11-23 17:03:01,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:01,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:01,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:01,686 INFO L87 Difference]: Start difference. First operand 8213 states and 10278 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 17:04:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:02,344 INFO L93 Difference]: Finished difference Result 18002 states and 22843 transitions. [2021-11-23 17:04:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 147 [2021-11-23 17:04:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:02,416 INFO L225 Difference]: With dead ends: 18002 [2021-11-23 17:04:02,417 INFO L226 Difference]: Without dead ends: 10578 [2021-11-23 17:04:02,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:04:02,430 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 984 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:02,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 1064 Invalid, 3233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 60.5s Time] [2021-11-23 17:04:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10578 states. [2021-11-23 17:04:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10578 to 10577. [2021-11-23 17:04:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10577 states, 10576 states have (on average 1.2120839636913767) internal successors, (12819), 10576 states have internal predecessors, (12819), 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 17:04:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 12819 transitions. [2021-11-23 17:04:02,766 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 12819 transitions. Word has length 147 [2021-11-23 17:04:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:02,766 INFO L470 AbstractCegarLoop]: Abstraction has 10577 states and 12819 transitions. [2021-11-23 17:04:02,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 17:04:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 12819 transitions. [2021-11-23 17:04:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-23 17:04:02,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:02,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:02,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:02,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:03,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:03,189 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -528449331, now seen corresponding path program 1 times [2021-11-23 17:04:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170534863] [2021-11-23 17:04:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:03,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:03,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:03,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:04:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:04:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:03,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:03,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170534863] [2021-11-23 17:04:03,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170534863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:03,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:03,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:04:03,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383473224] [2021-11-23 17:04:03,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:03,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:03,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:03,913 INFO L87 Difference]: Start difference. First operand 10577 states and 12819 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 17:05:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:07,189 INFO L93 Difference]: Finished difference Result 23535 states and 29299 transitions. [2021-11-23 17:05:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2021-11-23 17:05:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:07,237 INFO L225 Difference]: With dead ends: 23535 [2021-11-23 17:05:07,237 INFO L226 Difference]: Without dead ends: 12960 [2021-11-23 17:05:07,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 160 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 17:05:07,325 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 772 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:07,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1074 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 63.1s Time] [2021-11-23 17:05:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12960 states. [2021-11-23 17:05:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12960 to 12945. [2021-11-23 17:05:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 1.1937577255871445) internal successors, (15452), 12944 states have internal predecessors, (15452), 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 17:05:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 15452 transitions. [2021-11-23 17:05:07,554 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 15452 transitions. Word has length 162 [2021-11-23 17:05:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:07,555 INFO L470 AbstractCegarLoop]: Abstraction has 12945 states and 15452 transitions. [2021-11-23 17:05:07,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 17:05:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 15452 transitions. [2021-11-23 17:05:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 17:05:07,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:07,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:05:07,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:07,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:07,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1216054921, now seen corresponding path program 1 times [2021-11-23 17:05:07,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:07,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693776006] [2021-11-23 17:05:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:07,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:07,776 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:07,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:05:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:05:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:08,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:14,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693776006] [2021-11-23 17:05:14,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693776006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:14,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43656278] [2021-11-23 17:05:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:14,150 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:14,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:14,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:14,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:05:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:05:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:15,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:22,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43656278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274712018] [2021-11-23 17:05:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:22,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:05:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:22,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:05:22,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:05:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:05:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:23,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274712018] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:05:23,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:05:23,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 8 [2021-11-23 17:05:23,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689505481] [2021-11-23 17:05:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:23,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:23,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:05:23,883 INFO L87 Difference]: Start difference. First operand 12945 states and 15452 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:35,650 INFO L93 Difference]: Finished difference Result 25874 states and 32409 transitions. [2021-11-23 17:06:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-23 17:06:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:35,699 INFO L225 Difference]: With dead ends: 25874 [2021-11-23 17:06:35,699 INFO L226 Difference]: Without dead ends: 19239 [2021-11-23 17:06:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:06:35,712 INFO L933 BasicCegarLoop]: 1787 mSDtfsCounter, 844 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:35,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1919 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 71.6s Time] [2021-11-23 17:06:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19239 states. [2021-11-23 17:06:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19239 to 19239. [2021-11-23 17:06:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19239 states, 19238 states have (on average 1.154589874207298) internal successors, (22212), 19238 states have internal predecessors, (22212), 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 17:06:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19239 states to 19239 states and 22212 transitions. [2021-11-23 17:06:36,071 INFO L78 Accepts]: Start accepts. Automaton has 19239 states and 22212 transitions. Word has length 176 [2021-11-23 17:06:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 19239 states and 22212 transitions. [2021-11-23 17:06:36,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19239 states and 22212 transitions. [2021-11-23 17:06:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-23 17:06:36,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:36,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:36,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:36,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-23 17:06:36,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:36,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:36,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1810841034, now seen corresponding path program 1 times [2021-11-23 17:06:36,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:36,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008983057] [2021-11-23 17:06:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:36,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:36,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:36,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:36,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:06:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:37,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:38,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008983057] [2021-11-23 17:06:38,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008983057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1363931617] [2021-11-23 17:06:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:38,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:06:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:06:38,784 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:06:38,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:06:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:39,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1363931617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222785363] [2021-11-23 17:06:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:40,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:06:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:06:40,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:06:40,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cac0f2df-6932-4e35-a5b6-63bf9ce2675a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:06:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:06:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:41,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 97 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222785363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:44,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:06:44,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 7 [2021-11-23 17:06:44,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345273233] [2021-11-23 17:06:44,013 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:06:44,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:06:44,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:06:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:06:44,016 INFO L87 Difference]: Start difference. First operand 19239 states and 22212 transitions. Second operand has 8 states, 8 states have (on average 80.5) internal successors, (644), 7 states have internal predecessors, (644), 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 17:07:06,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:26,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:33,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:50,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:57,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:00,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:10,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:35,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:41,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []