./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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 adf9aede4969933a483ad692729ae0dede103496ae41b917177f2c151fa81fb1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:33:56,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:33:56,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:33:56,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:33:56,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:33:56,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:33:57,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:33:57,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:33:57,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:33:57,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:33:57,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:33:57,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:33:57,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:33:57,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:33:57,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:33:57,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:33:57,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:33:57,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:33:57,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:33:57,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:33:57,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:33:57,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:33:57,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:33:57,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:33:57,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:33:57,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:33:57,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:33:57,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:33:57,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:33:57,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:33:57,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:33:57,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:33:57,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:33:57,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:33:57,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:33:57,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:33:57,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:33:57,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:33:57,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:33:57,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:33:57,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:33:57,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:33:57,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:33:57,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:33:57,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:33:57,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:33:57,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:33:57,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:33:57,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:33:57,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:33:57,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:33:57,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:33:57,172 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:33:57,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:33:57,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:33:57,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:33:57,174 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:33:57,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:33:57,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:33:57,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:33:57,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:33:57,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:33:57,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:33:57,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:33:57,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:33:57,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:33:57,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:33:57,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:33:57,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:33:57,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:33:57,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:33:57,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:33:57,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:33:57,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:33:57,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:33:57,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:33:57,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:33:57,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:33:57,183 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:33:57,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:33:57,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:33:57,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:33:57,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:33:57,184 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf9aede4969933a483ad692729ae0dede103496ae41b917177f2c151fa81fb1 [2021-11-23 17:33:57,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:33:57,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:33:57,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:33:57,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:33:57,548 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:33:57,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2021-11-23 17:33:57,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/ffaf63338/c890f0eef1bb4032bfc46e7f4f048aa8/FLAG2e2231395 [2021-11-23 17:33:58,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:33:58,337 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2021-11-23 17:33:58,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/ffaf63338/c890f0eef1bb4032bfc46e7f4f048aa8/FLAG2e2231395 [2021-11-23 17:33:58,522 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/ffaf63338/c890f0eef1bb4032bfc46e7f4f048aa8 [2021-11-23 17:33:58,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:33:58,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:33:58,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:33:58,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:33:58,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:33:58,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:33:58" (1/1) ... [2021-11-23 17:33:58,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ded0909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:58, skipping insertion in model container [2021-11-23 17:33:58,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:33:58" (1/1) ... [2021-11-23 17:33:58,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:33:58,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:33:58,846 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c[957,970] [2021-11-23 17:33:59,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:33:59,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:33:59,301 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c[957,970] [2021-11-23 17:33:59,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:33:59,541 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:33:59,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59 WrapperNode [2021-11-23 17:33:59,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:33:59,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:33:59,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:33:59,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:33:59,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,699 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:33:59,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:33:59,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:33:59,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:33:59,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:33:59,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:33:59,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:33:59,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:33:59,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:33:59,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:59" (1/1) ... [2021-11-23 17:33:59,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:33:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:59,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:33:59,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:33:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:33:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:33:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:33:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:00,036 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:00,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:01,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:01,679 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:34:01,686 INFO L158 Benchmark]: Toolchain (without parser) took 3156.21ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.4MB in the beginning and 59.4MB in the end (delta: 5.0MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. [2021-11-23 17:34:01,686 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 66.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:01,688 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1013.10ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.1MB in the beginning and 80.6MB in the end (delta: -16.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-23 17:34:01,690 INFO L158 Benchmark]: Boogie Procedure Inliner took 156.26ms. Allocated memory is still 119.5MB. Free memory was 80.6MB in the beginning and 70.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:34:01,691 INFO L158 Benchmark]: Boogie Preprocessor took 136.01ms. Allocated memory is still 119.5MB. Free memory was 70.8MB in the beginning and 65.3MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:34:01,692 INFO L158 Benchmark]: RCFGBuilder took 1844.83ms. Allocated memory is still 119.5MB. Free memory was 64.8MB in the beginning and 59.4MB in the end (delta: 5.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-23 17:34:01,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 66.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1013.10ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.1MB in the beginning and 80.6MB in the end (delta: -16.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 156.26ms. Allocated memory is still 119.5MB. Free memory was 80.6MB in the beginning and 70.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 136.01ms. Allocated memory is still 119.5MB. Free memory was 70.8MB in the beginning and 65.3MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1844.83ms. Allocated memory is still 119.5MB. Free memory was 64.8MB in the beginning and 59.4MB in the end (delta: 5.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:34:01,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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 adf9aede4969933a483ad692729ae0dede103496ae41b917177f2c151fa81fb1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:34:04,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:34:04,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:34:04,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:34:04,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:34:04,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:34:04,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:34:04,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:34:04,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:34:04,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:34:04,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:34:04,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:34:04,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:34:04,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:34:04,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:34:04,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:34:04,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:34:04,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:34:04,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:34:04,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:34:04,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:34:04,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:34:04,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:34:04,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:34:04,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:34:04,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:34:04,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:34:04,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:34:04,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:34:04,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:34:04,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:34:04,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:34:04,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:34:04,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:34:04,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:34:04,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:34:04,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:34:04,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:34:04,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:34:04,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:34:04,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:34:04,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:34:04,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:34:04,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:34:04,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:34:04,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:34:04,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:34:04,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:34:04,842 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:34:04,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:34:04,843 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:34:04,844 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:34:04,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:34:04,845 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:34:04,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:34:04,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:34:04,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:34:04,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:34:04,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:34:04,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:34:04,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:34:04,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:34:04,849 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:34:04,850 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:34:04,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:34:04,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:34:04,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:34:04,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:34:04,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:34:04,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:34:04,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:34:04,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:04,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:34:04,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:34:04,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:34:04,854 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:34:04,854 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:04,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:34:04,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:34:04,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:34:04,856 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf9aede4969933a483ad692729ae0dede103496ae41b917177f2c151fa81fb1 [2021-11-23 17:34:05,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:34:05,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:34:05,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:34:05,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:34:05,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:34:05,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2021-11-23 17:34:05,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/cfb969625/b73429c747b34f71a52e5643c8c34a4a/FLAG9ec010173 [2021-11-23 17:34:06,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:34:06,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2021-11-23 17:34:06,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/cfb969625/b73429c747b34f71a52e5643c8c34a4a/FLAG9ec010173 [2021-11-23 17:34:06,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/data/cfb969625/b73429c747b34f71a52e5643c8c34a4a [2021-11-23 17:34:06,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:34:06,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:34:06,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:06,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:34:06,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:34:06,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753c2810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06, skipping insertion in model container [2021-11-23 17:34:06,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:34:06,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:34:06,782 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c[957,970] [2021-11-23 17:34:07,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:07,255 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:34:07,275 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_ae735f5e-e237-4eee-bdd7-d7605de71bd9/sv-benchmarks/c/eca-rers2012/Problem14_label54.c[957,970] [2021-11-23 17:34:07,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:07,554 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:34:07,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07 WrapperNode [2021-11-23 17:34:07,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:07,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:07,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:34:07,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:34:07,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,717 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:34:07,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:07,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:34:07,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:34:07,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:34:07,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:34:07,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:34:07,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:34:07,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:34:07,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (1/1) ... [2021-11-23 17:34:07,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:07,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:34:07,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:34:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:34:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:34:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:34:07,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:08,072 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:08,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:12,264 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:12,278 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:34:12,278 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:34:12,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:12 BoogieIcfgContainer [2021-11-23 17:34:12,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:34:12,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:34:12,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:34:12,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:34:12,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:34:06" (1/3) ... [2021-11-23 17:34:12,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61758ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:12, skipping insertion in model container [2021-11-23 17:34:12,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:07" (2/3) ... [2021-11-23 17:34:12,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61758ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:12, skipping insertion in model container [2021-11-23 17:34:12,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:12" (3/3) ... [2021-11-23 17:34:12,290 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2021-11-23 17:34:12,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:34:12,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:34:12,354 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:34:12,362 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:34:12,363 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:34:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:34:12,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:12,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:34:12,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-11-23 17:34:12,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:12,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609559424] [2021-11-23 17:34:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:12,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:12,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:12,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:34:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:34:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:12,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:12,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609559424] [2021-11-23 17:34:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609559424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:12,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:12,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:12,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71167025] [2021-11-23 17:34:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:12,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:12,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:12,643 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:17,348 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2021-11-23 17:34:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-23 17:34:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:17,370 INFO L225 Difference]: With dead ends: 669 [2021-11-23 17:34:17,371 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:34:17,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 17:34:17,381 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:17,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 132 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 17:34:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:34:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:34:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4540389972144847) internal successors, (522), 359 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 522 transitions. [2021-11-23 17:34:17,472 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 522 transitions. Word has length 6 [2021-11-23 17:34:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:17,473 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 522 transitions. [2021-11-23 17:34:17,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 522 transitions. [2021-11-23 17:34:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 17:34:17,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:17,477 INFO L514 BasicCegarLoop]: trace histogram [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 17:34:17,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:17,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:17,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1536266425, now seen corresponding path program 1 times [2021-11-23 17:34:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:17,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699179123] [2021-11-23 17:34:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:17,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:17,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:34:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:34:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:18,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:18,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:18,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699179123] [2021-11-23 17:34:18,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699179123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:18,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:18,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:18,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198006710] [2021-11-23 17:34:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:18,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:18,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:18,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:18,182 INFO L87 Difference]: Start difference. First operand 360 states and 522 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:22,375 INFO L93 Difference]: Finished difference Result 1074 states and 1561 transitions. [2021-11-23 17:34:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 72 [2021-11-23 17:34:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:22,384 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:34:22,384 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:34:22,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 17:34:22,389 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:22,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 17:34:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:34:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:34:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2021-11-23 17:34:22,462 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 72 [2021-11-23 17:34:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2021-11-23 17:34:22,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2021-11-23 17:34:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 17:34:22,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:22,467 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:34:22,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:34:22,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:22,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 408463380, now seen corresponding path program 1 times [2021-11-23 17:34:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:22,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951707953] [2021-11-23 17:34:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:22,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:22,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:22,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:22,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:34:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:34:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:23,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:23,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:23,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951707953] [2021-11-23 17:34:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951707953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:23,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:23,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396740040] [2021-11-23 17:34:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:23,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:23,184 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:27,452 INFO L93 Difference]: Finished difference Result 1964 states and 2655 transitions. [2021-11-23 17:34:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2021-11-23 17:34:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:27,462 INFO L225 Difference]: With dead ends: 1964 [2021-11-23 17:34:27,463 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:34:27,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 17:34:27,466 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:34:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:34:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:34:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 17:34:27,513 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 74 [2021-11-23 17:34:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:27,514 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 17:34:27,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 17:34:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 17:34:27,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:27,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:27,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:27,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:27,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1750409750, now seen corresponding path program 1 times [2021-11-23 17:34:27,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668289015] [2021-11-23 17:34:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:27,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:27,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:27,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:34:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:28,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:28,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:28,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668289015] [2021-11-23 17:34:28,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668289015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:28,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:28,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:34:28,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980270303] [2021-11-23 17:34:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:28,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:28,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:28,990 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:32,514 INFO L93 Difference]: Finished difference Result 2171 states and 2741 transitions. [2021-11-23 17:34:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:34:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 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 155 [2021-11-23 17:34:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:32,524 INFO L225 Difference]: With dead ends: 2171 [2021-11-23 17:34:32,525 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:34:32,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:34:32,529 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:32,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 113 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:34:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:34:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:34:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.239028944911298) internal successors, (1327), 1071 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1327 transitions. [2021-11-23 17:34:32,569 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1327 transitions. Word has length 155 [2021-11-23 17:34:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1327 transitions. [2021-11-23 17:34:32,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1327 transitions. [2021-11-23 17:34:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:34:32,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:32,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:32,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:32,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:32,806 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 822203819, now seen corresponding path program 1 times [2021-11-23 17:34:32,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:32,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597412541] [2021-11-23 17:34:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:32,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:32,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:32,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:34:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:34:34,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:34,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597412541] [2021-11-23 17:34:34,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597412541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:34,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:34,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:34,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697944387] [2021-11-23 17:34:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:34,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:34,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:34,652 INFO L87 Difference]: Start difference. First operand 1072 states and 1327 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:37,422 INFO L93 Difference]: Finished difference Result 1786 states and 2287 transitions. [2021-11-23 17:34:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-23 17:34:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:37,431 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:34:37,432 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:34:37,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:37,435 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:37,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 17:34:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:34:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:34:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2334267040149394) internal successors, (1321), 1071 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1321 transitions. [2021-11-23 17:34:37,471 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1321 transitions. Word has length 181 [2021-11-23 17:34:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:37,472 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1321 transitions. [2021-11-23 17:34:37,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1321 transitions. [2021-11-23 17:34:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-23 17:34:37,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:37,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:34:37,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:37,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:37,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1974911205, now seen corresponding path program 1 times [2021-11-23 17:34:37,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67596761] [2021-11-23 17:34:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:37,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:37,700 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:34:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:34:39,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:34:40,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67596761] [2021-11-23 17:34:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67596761] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:34:40,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:34:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:34:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221024816] [2021-11-23 17:34:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:40,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:40,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:40,766 INFO L87 Difference]: Start difference. First operand 1072 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:49,824 INFO L93 Difference]: Finished difference Result 2142 states and 2812 transitions. [2021-11-23 17:34:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-11-23 17:34:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:49,833 INFO L225 Difference]: With dead ends: 2142 [2021-11-23 17:34:49,833 INFO L226 Difference]: Without dead ends: 1428 [2021-11-23 17:34:49,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:49,836 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:49,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 17:34:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-23 17:34:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-23 17:34:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.238262088297127) internal successors, (1767), 1427 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1767 transitions. [2021-11-23 17:34:49,873 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1767 transitions. Word has length 285 [2021-11-23 17:34:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1767 transitions. [2021-11-23 17:34:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1767 transitions. [2021-11-23 17:34:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-23 17:34:49,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:49,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:49,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:50,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:50,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1905890696, now seen corresponding path program 1 times [2021-11-23 17:34:50,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757907017] [2021-11-23 17:34:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:50,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:50,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:50,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:50,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:34:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 288 proven. 159 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-23 17:34:51,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-23 17:34:53,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:53,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757907017] [2021-11-23 17:34:53,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757907017] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:34:53,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:34:53,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:34:53,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997351199] [2021-11-23 17:34:53,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:53,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:53,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:34:53,574 INFO L87 Difference]: Start difference. First operand 1428 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:01,441 INFO L93 Difference]: Finished difference Result 3210 states and 4150 transitions. [2021-11-23 17:35:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:35:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 396 [2021-11-23 17:35:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:01,455 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:35:01,456 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:35:01,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:01,459 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:01,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 17:35:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:35:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:35:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2463768115942029) internal successors, (2666), 2139 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2666 transitions. [2021-11-23 17:35:01,532 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2666 transitions. Word has length 396 [2021-11-23 17:35:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:01,533 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2666 transitions. [2021-11-23 17:35:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2666 transitions. [2021-11-23 17:35:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-23 17:35:01,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:01,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:01,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:01,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:01,761 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 921190048, now seen corresponding path program 1 times [2021-11-23 17:35:01,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373724341] [2021-11-23 17:35:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:01,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:01,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:01,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:01,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:35:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:35:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 222 proven. 277 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:35:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 470 proven. 29 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:35:15,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:15,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373724341] [2021-11-23 17:35:15,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373724341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63229217] [2021-11-23 17:35:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:15,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:15,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:15,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:35:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:35:15,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 304 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:35:18,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 304 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:35:20,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63229217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:20,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140542337] [2021-11-23 17:35:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:20,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:20,095 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:20,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:35:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:20,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:35:20,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 164 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:35:22,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 164 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:35:24,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140542337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:24,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:24,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 4, 4] total 18 [2021-11-23 17:35:24,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165684390] [2021-11-23 17:35:24,588 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:24,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:35:24,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:35:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:35:24,593 INFO L87 Difference]: Start difference. First operand 2140 states and 2666 transitions. Second operand has 18 states, 18 states have (on average 49.111111111111114) internal successors, (884), 18 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:00,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:18,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:32,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:45,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:46,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:48,126 INFO L93 Difference]: Finished difference Result 5963 states and 7556 transitions. [2021-11-23 17:36:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:36:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 49.111111111111114) internal successors, (884), 18 states have internal predecessors, (884), 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 412 [2021-11-23 17:36:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:48,153 INFO L225 Difference]: With dead ends: 5963 [2021-11-23 17:36:48,153 INFO L226 Difference]: Without dead ends: 3922 [2021-11-23 17:36:48,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2483 GetRequests, 2455 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-23 17:36:48,158 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2312 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4922 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 5655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 4922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:48,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2312 Valid, 116 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 4922 Invalid, 0 Unknown, 0 Unchecked, 80.0s Time] [2021-11-23 17:36:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-11-23 17:36:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3564. [2021-11-23 17:36:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.0836373842267752) internal successors, (3861), 3563 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3861 transitions. [2021-11-23 17:36:48,242 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3861 transitions. Word has length 412 [2021-11-23 17:36:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:48,242 INFO L470 AbstractCegarLoop]: Abstraction has 3564 states and 3861 transitions. [2021-11-23 17:36:48,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 49.111111111111114) internal successors, (884), 18 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3861 transitions. [2021-11-23 17:36:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2021-11-23 17:36:48,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:48,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:48,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:48,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:48,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:48,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:48,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1567966255, now seen corresponding path program 1 times [2021-11-23 17:36:48,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:48,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180322695] [2021-11-23 17:36:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:48,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:48,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:48,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:36:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:49,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:36:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 19 proven. 898 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:36:59,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 649 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:37:32,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180322695] [2021-11-23 17:37:32,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180322695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419924507] [2021-11-23 17:37:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:32,099 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:32,105 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:37:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:37:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:37:33,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:33,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419924507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:33,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:37:33,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 20 [2021-11-23 17:37:33,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968412527] [2021-11-23 17:37:33,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:33,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:33,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:37:33,665 INFO L87 Difference]: Start difference. First operand 3564 states and 3861 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 17:37:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:36,271 INFO L93 Difference]: Finished difference Result 7482 states and 8259 transitions. [2021-11-23 17:37:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 660 [2021-11-23 17:37:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:36,293 INFO L225 Difference]: With dead ends: 7482 [2021-11-23 17:37:36,293 INFO L226 Difference]: Without dead ends: 4632 [2021-11-23 17:37:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1977 GetRequests, 1959 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:37:36,298 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 175 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:36,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 224 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:37:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-11-23 17:37:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 4632. [2021-11-23 17:37:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 1.078600734182682) internal successors, (4995), 4631 states have internal predecessors, (4995), 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 17:37:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4995 transitions. [2021-11-23 17:37:36,399 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4995 transitions. Word has length 660 [2021-11-23 17:37:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 4995 transitions. [2021-11-23 17:37:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 17:37:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4995 transitions. [2021-11-23 17:37:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2021-11-23 17:37:36,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:36,409 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 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 17:37:36,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:36,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:37:36,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:36,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1557138430, now seen corresponding path program 1 times [2021-11-23 17:37:36,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668068531] [2021-11-23 17:37:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:36,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:36,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:36,840 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:36,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:37:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:37:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 393 proven. 898 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-23 17:37:46,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 1023 proven. 268 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-23 17:38:19,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668068531] [2021-11-23 17:38:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668068531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [229006433] [2021-11-23 17:38:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:19,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:19,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:19,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:38:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:38:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 393 proven. 4 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:38:20,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 393 proven. 4 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:38:22,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [229006433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870834731] [2021-11-23 17:38:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:22,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:22,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:22,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:38:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:38:22,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 74 proven. 323 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:38:25,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 74 proven. 323 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:38:27,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870834731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:27,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:27,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4, 4, 5, 5] total 25 [2021-11-23 17:38:27,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353361520] [2021-11-23 17:38:27,487 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:38:27,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:38:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:38:27,492 INFO L87 Difference]: Start difference. First operand 4632 states and 4995 transitions. Second operand has 25 states, 25 states have (on average 54.52) internal successors, (1363), 25 states have internal predecessors, (1363), 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 17:38:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:38,574 INFO L93 Difference]: Finished difference Result 10520 states and 11509 transitions. [2021-11-23 17:38:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:38:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 54.52) internal successors, (1363), 25 states have internal predecessors, (1363), 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 735 [2021-11-23 17:38:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:38,613 INFO L225 Difference]: With dead ends: 10520 [2021-11-23 17:38:38,613 INFO L226 Difference]: Without dead ends: 6602 [2021-11-23 17:38:38,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4420 GetRequests, 4386 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 17:38:38,620 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3096 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4442 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3096 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 4733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 4442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:38,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3096 Valid, 84 Invalid, 4733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 4442 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 17:38:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2021-11-23 17:38:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5157. [2021-11-23 17:38:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5157 states, 5156 states have (on average 1.1010473235065943) internal successors, (5677), 5156 states have internal predecessors, (5677), 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 17:38:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5157 states to 5157 states and 5677 transitions. [2021-11-23 17:38:38,792 INFO L78 Accepts]: Start accepts. Automaton has 5157 states and 5677 transitions. Word has length 735 [2021-11-23 17:38:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:38,794 INFO L470 AbstractCegarLoop]: Abstraction has 5157 states and 5677 transitions. [2021-11-23 17:38:38,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.52) internal successors, (1363), 25 states have internal predecessors, (1363), 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 17:38:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5157 states and 5677 transitions. [2021-11-23 17:38:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2021-11-23 17:38:38,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:38,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:38,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 17:38:39,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:38:39,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:39,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:39,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash -76827069, now seen corresponding path program 1 times [2021-11-23 17:38:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372834704] [2021-11-23 17:38:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:39,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:39,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:39,434 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:39,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:38:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:39,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:38:39,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 113 proven. 1249 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-23 17:38:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 969 proven. 393 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-23 17:39:11,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372834704] [2021-11-23 17:39:11,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372834704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776626852] [2021-11-23 17:39:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:11,801 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:11,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:11,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:39:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:39:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1003 proven. 158 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-11-23 17:39:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1003 proven. 158 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-11-23 17:39:17,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776626852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576503531] [2021-11-23 17:39:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:17,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:17,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:17,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:17,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:39:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:39:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1068 proven. 93 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-11-23 17:39:22,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1068 proven. 93 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-11-23 17:39:27,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576503531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:27,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:39:27,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 5, 5, 4, 4] total 24 [2021-11-23 17:39:27,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664336848] [2021-11-23 17:39:27,035 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:39:27,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:39:27,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:39:27,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:39:27,042 INFO L87 Difference]: Start difference. First operand 5157 states and 5677 transitions. Second operand has 24 states, 24 states have (on average 66.58333333333333) internal successors, (1598), 24 states have internal predecessors, (1598), 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 17:39:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:37,540 INFO L93 Difference]: Finished difference Result 10709 states and 11757 transitions. [2021-11-23 17:39:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 17:39:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 66.58333333333333) internal successors, (1598), 24 states have internal predecessors, (1598), 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 760 [2021-11-23 17:39:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:37,576 INFO L225 Difference]: With dead ends: 10709 [2021-11-23 17:39:37,576 INFO L226 Difference]: Without dead ends: 5892 [2021-11-23 17:39:37,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4578 GetRequests, 4538 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 17:39:37,583 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1521 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 5392 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 5392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:37,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 134 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 5392 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-23 17:39:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-11-23 17:39:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5312. [2021-11-23 17:39:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5312 states, 5311 states have (on average 1.0982865750329505) internal successors, (5833), 5311 states have internal predecessors, (5833), 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 17:39:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5312 states to 5312 states and 5833 transitions. [2021-11-23 17:39:37,710 INFO L78 Accepts]: Start accepts. Automaton has 5312 states and 5833 transitions. Word has length 760 [2021-11-23 17:39:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:37,711 INFO L470 AbstractCegarLoop]: Abstraction has 5312 states and 5833 transitions. [2021-11-23 17:39:37,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.58333333333333) internal successors, (1598), 24 states have internal predecessors, (1598), 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 17:39:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5312 states and 5833 transitions. [2021-11-23 17:39:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2021-11-23 17:39:37,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:37,725 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:37,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:37,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:39:38,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:38,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:38,340 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1923675347, now seen corresponding path program 1 times [2021-11-23 17:39:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625996358] [2021-11-23 17:39:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:38,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:38,347 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:38,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:39:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:39:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 217 proven. 1632 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 17:39:49,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:44,305 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true [2021-11-23 17:40:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1371 proven. 474 refuted. 0 times theorem prover too weak. 179 trivial. 6 not checked. [2021-11-23 17:40:48,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625996358] [2021-11-23 17:40:48,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625996358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [683616483] [2021-11-23 17:40:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:48,576 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:48,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:48,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:40:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2003 trivial. 0 not checked. [2021-11-23 17:40:49,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [683616483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:49,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:40:49,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12, 13] total 24 [2021-11-23 17:40:49,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095220814] [2021-11-23 17:40:49,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:49,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:49,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=375, Unknown=1, NotChecked=42, Total=552 [2021-11-23 17:40:49,959 INFO L87 Difference]: Start difference. First operand 5312 states and 5833 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 17:40:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:52,461 INFO L93 Difference]: Finished difference Result 11690 states and 12917 transitions. [2021-11-23 17:40:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 837 [2021-11-23 17:40:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:52,483 INFO L225 Difference]: With dead ends: 11690 [2021-11-23 17:40:52,483 INFO L226 Difference]: Without dead ends: 6558 [2021-11-23 17:40:52,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2508 GetRequests, 2486 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=134, Invalid=375, Unknown=1, NotChecked=42, Total=552 [2021-11-23 17:40:52,490 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 175 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:52,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 231 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:40:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2021-11-23 17:40:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 6024. [2021-11-23 17:40:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 1.086003652664785) internal successors, (6541), 6023 states have internal predecessors, (6541), 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 17:40:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 6541 transitions. [2021-11-23 17:40:52,613 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 6541 transitions. Word has length 837 [2021-11-23 17:40:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:52,615 INFO L470 AbstractCegarLoop]: Abstraction has 6024 states and 6541 transitions. [2021-11-23 17:40:52,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 17:40:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 6541 transitions. [2021-11-23 17:40:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2021-11-23 17:40:52,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:52,632 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:40:52,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:52,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-23 17:40:53,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:53,035 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -737274111, now seen corresponding path program 1 times [2021-11-23 17:40:53,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245294485] [2021-11-23 17:40:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:53,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:53,042 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:53,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae735f5e-e237-4eee-bdd7-d7605de71bd9/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:40:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:40:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 190 proven. 2298 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 17:41:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:59,630 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true