./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label02.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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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 fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:14,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:14,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:14,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:14,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:14,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:14,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:14,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:14,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:14,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:14,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:14,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:14,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:14,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:14,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:14,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:14,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:14,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:14,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:14,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:14,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:14,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:14,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:14,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:14,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:14,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:14,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:14,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:14,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:14,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:14,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:14,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:14,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:14,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:14,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:14,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:14,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:14,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:14,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:14,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:14,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:14,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:15:14,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:14,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:14,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:14,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:14,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:14,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:14,346 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:14,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:14,346 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:14,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:15:14,348 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:14,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:14,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:15:14,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:15:14,349 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:14,350 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:15:14,350 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:15:14,350 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:15:14,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:14,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:14,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:15:14,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:14,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:14,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:14,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:14,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:14,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:14,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:14,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:14,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:14,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:14,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:14,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:14,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:14,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:14,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:14,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:15:14,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:15:14,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:14,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:14,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:14,359 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 [2021-11-23 17:15:14,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:14,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:14,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:14,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:14,810 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:14,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-11-23 17:15:14,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/829991dd3/e159ec80f592484b8993370a01071bc3/FLAG2f4e3d592 [2021-11-23 17:15:16,006 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:16,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-11-23 17:15:16,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/829991dd3/e159ec80f592484b8993370a01071bc3/FLAG2f4e3d592 [2021-11-23 17:15:16,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/829991dd3/e159ec80f592484b8993370a01071bc3 [2021-11-23 17:15:16,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:16,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:16,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:16,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:16,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:16,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:16" (1/1) ... [2021-11-23 17:15:16,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4f8cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:16, skipping insertion in model container [2021-11-23 17:15:16,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:16" (1/1) ... [2021-11-23 17:15:16,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:16,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:17,177 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-11-23 17:15:19,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:19,456 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:19,507 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-11-23 17:15:20,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:20,848 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:20,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20 WrapperNode [2021-11-23 17:15:20,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:20,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:20,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:20,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:20,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:21,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:22,178 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-11-23 17:15:22,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:22,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:22,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:22,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:22,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:22,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:22,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:22,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:23,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:23,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:23,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:23,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:23,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:23,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:23,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:23,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:20" (1/1) ... [2021-11-23 17:15:23,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:23,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:23,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:23,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:23,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:15:23,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:23,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:23,863 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:23,865 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:34,680 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:34,770 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 17:15:34,777 INFO L158 Benchmark]: Toolchain (without parser) took 18472.75ms. Allocated memory was 107.0MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 68.4MB in the beginning and 694.3MB in the end (delta: -626.0MB). Peak memory consumption was 578.7MB. Max. memory is 16.1GB. [2021-11-23 17:15:34,777 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:34,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4544.01ms. Allocated memory was 107.0MB in the beginning and 278.9MB in the end (delta: 172.0MB). Free memory was 68.4MB in the beginning and 162.8MB in the end (delta: -94.5MB). Peak memory consumption was 123.5MB. Max. memory is 16.1GB. [2021-11-23 17:15:34,782 INFO L158 Benchmark]: Boogie Procedure Inliner took 1340.83ms. Allocated memory was 278.9MB in the beginning and 557.8MB in the end (delta: 278.9MB). Free memory was 161.8MB in the beginning and 361.0MB in the end (delta: -199.2MB). Peak memory consumption was 148.9MB. Max. memory is 16.1GB. [2021-11-23 17:15:34,783 INFO L158 Benchmark]: Boogie Preprocessor took 1485.08ms. Allocated memory is still 557.8MB. Free memory was 361.0MB in the beginning and 313.8MB in the end (delta: 47.2MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2021-11-23 17:15:34,785 INFO L158 Benchmark]: RCFGBuilder took 11092.23ms. Allocated memory was 557.8MB in the beginning and 1.1GB in the end (delta: 557.8MB). Free memory was 313.8MB in the beginning and 694.3MB in the end (delta: -380.5MB). Peak memory consumption was 375.5MB. Max. memory is 16.1GB. [2021-11-23 17:15:34,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4544.01ms. Allocated memory was 107.0MB in the beginning and 278.9MB in the end (delta: 172.0MB). Free memory was 68.4MB in the beginning and 162.8MB in the end (delta: -94.5MB). Peak memory consumption was 123.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 1340.83ms. Allocated memory was 278.9MB in the beginning and 557.8MB in the end (delta: 278.9MB). Free memory was 161.8MB in the beginning and 361.0MB in the end (delta: -199.2MB). Peak memory consumption was 148.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 1485.08ms. Allocated memory is still 557.8MB. Free memory was 361.0MB in the beginning and 313.8MB in the end (delta: 47.2MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. * RCFGBuilder took 11092.23ms. Allocated memory was 557.8MB in the beginning and 1.1GB in the end (delta: 557.8MB). Free memory was 313.8MB in the beginning and 694.3MB in the end (delta: -380.5MB). Peak memory consumption was 375.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:15:34,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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 fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:37,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:37,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:37,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:37,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:37,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:37,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:37,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:37,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:37,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:37,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:37,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:37,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:37,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:37,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:37,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:37,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:37,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:37,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:37,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:37,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:37,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:37,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:37,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:37,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:37,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:37,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:37,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:37,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:37,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:37,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:37,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:37,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:37,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:38,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:38,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:38,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:38,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:38,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:38,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:38,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:38,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:15:38,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:38,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:38,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:38,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:38,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:38,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:38,092 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:38,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:38,093 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:38,093 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:38,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:38,095 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:38,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:38,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:38,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:38,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:38,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:38,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:38,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:38,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:15:38,099 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:15:38,099 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:15:38,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:38,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:38,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:38,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:38,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:38,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:15:38,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:38,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:38,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:38,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:38,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:38,103 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:15:38,103 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:38,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:38,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:38,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:38,105 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 [2021-11-23 17:15:38,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:38,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:38,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:38,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:38,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:38,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-11-23 17:15:38,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/d8997a924/a79813e17eaa475aae89172fd51c5e3f/FLAGac540c30c [2021-11-23 17:15:40,152 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:40,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-11-23 17:15:40,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/d8997a924/a79813e17eaa475aae89172fd51c5e3f/FLAGac540c30c [2021-11-23 17:15:40,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/data/d8997a924/a79813e17eaa475aae89172fd51c5e3f [2021-11-23 17:15:40,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:40,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:40,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:40,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:40,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:40,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:40" (1/1) ... [2021-11-23 17:15:40,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abd03db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:40, skipping insertion in model container [2021-11-23 17:15:40,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:40" (1/1) ... [2021-11-23 17:15:40,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:40,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:41,116 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-11-23 17:15:43,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:43,298 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:43,371 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_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-11-23 17:15:44,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:44,917 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:44,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44 WrapperNode [2021-11-23 17:15:44,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:44,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:44,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:44,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:44,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:45,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:45,448 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9418 [2021-11-23 17:15:45,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:45,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:45,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:45,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:45,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:45,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:45,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:45,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:46,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:46,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:46,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:46,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:46,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:46,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:46,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:46,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (1/1) ... [2021-11-23 17:15:46,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:46,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:46,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:15:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:46,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:46,423 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:46,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:57,932 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:57,978 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:16:57,978 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:16:57,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:57 BoogieIcfgContainer [2021-11-23 17:16:57,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:16:57,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:16:57,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:16:57,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:16:57,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:15:40" (1/3) ... [2021-11-23 17:16:57,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10504e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:57, skipping insertion in model container [2021-11-23 17:16:57,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:44" (2/3) ... [2021-11-23 17:16:57,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10504e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:57, skipping insertion in model container [2021-11-23 17:16:57,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:57" (3/3) ... [2021-11-23 17:16:57,999 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label02.c [2021-11-23 17:16:58,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:16:58,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:16:58,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:16:58,118 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 17:16:58,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:16:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 17:16:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:16:58,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:58,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:58,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-11-23 17:16:58,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009070419] [2021-11-23 17:16:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:58,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:58,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:58,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:16:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:58,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:58,978 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 17:16:58,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:58,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009070419] [2021-11-23 17:16:58,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009070419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:58,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:58,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:16:58,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118006598] [2021-11-23 17:16:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:58,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:58,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:59,040 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:32,061 INFO L93 Difference]: Finished difference Result 4912 states and 9308 transitions. [2021-11-23 17:18:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 66 [2021-11-23 17:18:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:32,123 INFO L225 Difference]: With dead ends: 4912 [2021-11-23 17:18:32,123 INFO L226 Difference]: Without dead ends: 3100 [2021-11-23 17:18:32,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:32,144 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1417 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:32,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 1746 Invalid, 5704 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1199 Valid, 4505 Invalid, 0 Unknown, 0 Unchecked, 92.6s Time] [2021-11-23 17:18:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-23 17:18:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3098. [2021-11-23 17:18:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 1.5715208266063934) internal successors, (4867), 3097 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4867 transitions. [2021-11-23 17:18:32,359 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4867 transitions. Word has length 66 [2021-11-23 17:18:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:32,360 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 4867 transitions. [2021-11-23 17:18:32,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4867 transitions. [2021-11-23 17:18:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 17:18:32,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:32,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:32,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:18:32,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:32,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:32,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2005011634, now seen corresponding path program 1 times [2021-11-23 17:18:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185338109] [2021-11-23 17:18:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:32,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:32,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:18:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:33,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:33,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185338109] [2021-11-23 17:18:33,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185338109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:33,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:33,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:33,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843499704] [2021-11-23 17:18:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:33,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:33,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:33,455 INFO L87 Difference]: Start difference. First operand 3098 states and 4867 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:30,581 INFO L93 Difference]: Finished difference Result 9074 states and 14292 transitions. [2021-11-23 17:20:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 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 135 [2021-11-23 17:20:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:30,630 INFO L225 Difference]: With dead ends: 9074 [2021-11-23 17:20:30,630 INFO L226 Difference]: Without dead ends: 5978 [2021-11-23 17:20:30,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 17:20:30,638 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 2516 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 5282 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2516 Valid, 989 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5282 Invalid, 0 Unknown, 0 Unchecked, 116.9s Time] [2021-11-23 17:20:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2021-11-23 17:20:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 5975. [2021-11-23 17:20:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 1.5219283562102444) internal successors, (9092), 5974 states have internal predecessors, (9092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 9092 transitions. [2021-11-23 17:20:30,827 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 9092 transitions. Word has length 135 [2021-11-23 17:20:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:30,830 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 9092 transitions. [2021-11-23 17:20:30,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 9092 transitions. [2021-11-23 17:20:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 17:20:30,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:30,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:30,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:31,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -662382235, now seen corresponding path program 1 times [2021-11-23 17:20:31,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598714090] [2021-11-23 17:20:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:31,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:31,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:31,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:20:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:31,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:31,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598714090] [2021-11-23 17:20:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598714090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:31,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:31,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:20:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687664236] [2021-11-23 17:20:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:31,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:31,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:20:31,845 INFO L87 Difference]: Start difference. First operand 5975 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:06,687 INFO L93 Difference]: Finished difference Result 14710 states and 22259 transitions. [2021-11-23 17:22:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 157 [2021-11-23 17:22:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:06,746 INFO L225 Difference]: With dead ends: 14710 [2021-11-23 17:22:06,747 INFO L226 Difference]: Without dead ends: 8737 [2021-11-23 17:22:06,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 17:22:06,757 INFO L933 BasicCegarLoop]: 1705 mSDtfsCounter, 1450 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 5492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:06,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 1925 Invalid, 5492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 94.6s Time] [2021-11-23 17:22:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-11-23 17:22:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 8719. [2021-11-23 17:22:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 1.4050240880935994) internal successors, (12249), 8718 states have internal predecessors, (12249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 12249 transitions. [2021-11-23 17:22:06,974 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 12249 transitions. Word has length 157 [2021-11-23 17:22:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:06,975 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 12249 transitions. [2021-11-23 17:22:06,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 12249 transitions. [2021-11-23 17:22:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 17:22:06,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:06,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:06,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:07,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:07,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2117077462, now seen corresponding path program 1 times [2021-11-23 17:22:07,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:07,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032893206] [2021-11-23 17:22:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:07,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:07,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:22:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:07,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:07,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032893206] [2021-11-23 17:22:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032893206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:07,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:07,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029174233] [2021-11-23 17:22:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:07,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:07,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:07,990 INFO L87 Difference]: Start difference. First operand 8719 states and 12249 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:34,378 INFO L93 Difference]: Finished difference Result 22907 states and 31678 transitions. [2021-11-23 17:23:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 163 [2021-11-23 17:23:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:34,444 INFO L225 Difference]: With dead ends: 22907 [2021-11-23 17:23:34,444 INFO L226 Difference]: Without dead ends: 14190 [2021-11-23 17:23:34,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:34,456 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 1375 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:34,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 1919 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 4352 Invalid, 0 Unknown, 0 Unchecked, 86.1s Time] [2021-11-23 17:23:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states. [2021-11-23 17:23:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14190 to 14186. [2021-11-23 17:23:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14186 states, 14185 states have (on average 1.266055692633063) internal successors, (17959), 14185 states have internal predecessors, (17959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14186 states to 14186 states and 17959 transitions. [2021-11-23 17:23:34,754 INFO L78 Accepts]: Start accepts. Automaton has 14186 states and 17959 transitions. Word has length 163 [2021-11-23 17:23:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:34,755 INFO L470 AbstractCegarLoop]: Abstraction has 14186 states and 17959 transitions. [2021-11-23 17:23:34,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14186 states and 17959 transitions. [2021-11-23 17:23:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-23 17:23:34,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:34,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:34,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:34,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:34,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1083783417, now seen corresponding path program 1 times [2021-11-23 17:23:34,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:34,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719351386] [2021-11-23 17:23:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:34,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:34,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:34,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:23:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:23:35,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:37,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:37,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719351386] [2021-11-23 17:23:37,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719351386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:37,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:37,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:37,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106589101] [2021-11-23 17:23:37,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:37,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:37,333 INFO L87 Difference]: Start difference. First operand 14186 states and 17959 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:00,724 INFO L93 Difference]: Finished difference Result 35208 states and 43489 transitions. [2021-11-23 17:25:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:00,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 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 273 [2021-11-23 17:25:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:00,777 INFO L225 Difference]: With dead ends: 35208 [2021-11-23 17:25:00,777 INFO L226 Difference]: Without dead ends: 21024 [2021-11-23 17:25:00,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:00,793 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 1177 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:00,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1960 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4526 Invalid, 0 Unknown, 0 Unchecked, 83.1s Time] [2021-11-23 17:25:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21024 states. [2021-11-23 17:25:01,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21024 to 21018. [2021-11-23 17:25:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21018 states, 21017 states have (on average 1.1924156635104914) internal successors, (25061), 21017 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 25061 transitions. [2021-11-23 17:25:01,106 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 25061 transitions. Word has length 273 [2021-11-23 17:25:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 21018 states and 25061 transitions. [2021-11-23 17:25:01,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 25061 transitions. [2021-11-23 17:25:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-23 17:25:01,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:01,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:01,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:01,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash -379973805, now seen corresponding path program 1 times [2021-11-23 17:25:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666433203] [2021-11-23 17:25:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:01,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:01,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:01,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:05,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:05,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:05,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666433203] [2021-11-23 17:25:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666433203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:05,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:05,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:05,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176735638] [2021-11-23 17:25:05,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:05,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:05,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:05,496 INFO L87 Difference]: Start difference. First operand 21018 states and 25061 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:26,288 INFO L93 Difference]: Finished difference Result 35227 states and 42827 transitions. [2021-11-23 17:26:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:26:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 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 301 [2021-11-23 17:26:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:26,336 INFO L225 Difference]: With dead ends: 35227 [2021-11-23 17:26:26,336 INFO L226 Difference]: Without dead ends: 15545 [2021-11-23 17:26:26,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:26:26,362 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 7351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2116 Invalid, 7351 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 7343 Invalid, 0 Unknown, 0 Unchecked, 80.5s Time] [2021-11-23 17:26:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2021-11-23 17:26:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 15544. [2021-11-23 17:26:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15544 states, 15543 states have (on average 1.2284629736859036) internal successors, (19094), 15543 states have internal predecessors, (19094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15544 states to 15544 states and 19094 transitions. [2021-11-23 17:26:26,711 INFO L78 Accepts]: Start accepts. Automaton has 15544 states and 19094 transitions. Word has length 301 [2021-11-23 17:26:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:26,712 INFO L470 AbstractCegarLoop]: Abstraction has 15544 states and 19094 transitions. [2021-11-23 17:26:26,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15544 states and 19094 transitions. [2021-11-23 17:26:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2021-11-23 17:26:26,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:26,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:26,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:26,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:26,955 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash -107422752, now seen corresponding path program 1 times [2021-11-23 17:26:26,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334780976] [2021-11-23 17:26:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:26,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:26,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:26,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e38014f-aeb6-4435-b7f9-9ce7ac170a10/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:26:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:29,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:30,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334780976] [2021-11-23 17:26:30,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334780976] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:26:30,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:26:30,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:26:30,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254424816] [2021-11-23 17:26:30,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:30,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:30,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:30,697 INFO L87 Difference]: Start difference. First operand 15544 states and 19094 transitions. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:38,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:41,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:32,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:57,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:02,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:22,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []