./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7 --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 da5766c1ca12341f0994689f6bf08ae5600fa9a989c5b43eb2692fd9555b0295 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:43:06,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:43:06,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:43:06,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:43:06,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:43:06,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:43:06,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:43:06,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:43:06,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:43:06,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:43:06,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:43:06,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:43:06,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:43:06,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:43:06,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:43:06,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:43:06,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:43:06,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:43:06,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:43:06,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:43:06,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:43:06,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:43:06,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:43:06,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:43:06,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:43:06,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:43:06,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:43:06,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:43:06,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:43:06,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:43:06,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:43:06,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:43:06,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:43:06,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:43:06,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:43:06,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:43:06,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:43:06,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:43:06,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:43:06,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:43:06,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:43:06,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:43:06,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:43:06,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:43:06,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:43:06,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:43:06,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:43:06,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:43:06,263 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:43:06,263 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:43:06,263 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:43:06,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:43:06,264 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:43:06,264 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:43:06,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:43:06,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:43:06,265 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:43:06,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:43:06,266 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:43:06,266 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:43:06,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:43:06,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:43:06,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:43:06,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:43:06,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:43:06,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:43:06,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:43:06,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:43:06,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:43:06,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:43:06,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:43:06,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:43:06,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:43:06,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:43:06,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:43:06,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:43:06,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:43:06,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:43:06,271 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_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da5766c1ca12341f0994689f6bf08ae5600fa9a989c5b43eb2692fd9555b0295 [2021-11-25 19:43:06,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:43:06,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:43:06,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:43:06,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:43:06,551 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:43:06,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c [2021-11-25 19:43:06,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/data/381285ca4/23e1304708204437a6c59f247600c6e4/FLAG974f82846 [2021-11-25 19:43:07,214 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:43:07,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c [2021-11-25 19:43:07,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/data/381285ca4/23e1304708204437a6c59f247600c6e4/FLAG974f82846 [2021-11-25 19:43:07,479 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/data/381285ca4/23e1304708204437a6c59f247600c6e4 [2021-11-25 19:43:07,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:43:07,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:43:07,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:43:07,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:43:07,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:43:07,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:43:07" (1/1) ... [2021-11-25 19:43:07,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f329db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:07, skipping insertion in model container [2021-11-25 19:43:07,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:43:07" (1/1) ... [2021-11-25 19:43:07,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:43:07,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:43:08,017 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_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c[65397,65410] [2021-11-25 19:43:08,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:43:08,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:43:08,180 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_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-2.c[65397,65410] [2021-11-25 19:43:08,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:43:08,215 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:43:08,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08 WrapperNode [2021-11-25 19:43:08,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:43:08,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:43:08,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:43:08,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:43:08,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,330 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-11-25 19:43:08,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:43:08,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:43:08,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:43:08,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:43:08,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:43:08,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:43:08,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:43:08,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:43:08,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (1/1) ... [2021-11-25 19:43:08,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:43:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:08,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:43:08,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:43:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:43:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:43:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:43:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:43:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:43:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:43:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:43:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:43:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:43:08,735 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:43:08,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:43:08,752 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:43:11,746 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-25 19:43:11,746 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-25 19:43:11,747 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:43:12,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:43:12,150 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:43:12,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:43:12 BoogieIcfgContainer [2021-11-25 19:43:12,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:43:12,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:43:12,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:43:12,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:43:12,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:43:07" (1/3) ... [2021-11-25 19:43:12,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80e19b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:43:12, skipping insertion in model container [2021-11-25 19:43:12,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:43:08" (2/3) ... [2021-11-25 19:43:12,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80e19b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:43:12, skipping insertion in model container [2021-11-25 19:43:12,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:43:12" (3/3) ... [2021-11-25 19:43:12,162 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.03.i.cil-2.c [2021-11-25 19:43:12,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:43:12,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:43:12,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:43:12,238 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 [2021-11-25 19:43:12,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:43:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:43:12,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:12,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:12,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash 820023686, now seen corresponding path program 1 times [2021-11-25 19:43:12,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018834684] [2021-11-25 19:43:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:12,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:13,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018834684] [2021-11-25 19:43:13,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018834684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:13,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:13,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:43:13,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042225527] [2021-11-25 19:43:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:13,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:13,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:13,101 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-11-25 19:43:15,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:16,097 INFO L93 Difference]: Finished difference Result 173 states and 297 transitions. [2021-11-25 19:43:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-11-25 19:43:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:16,110 INFO L225 Difference]: With dead ends: 173 [2021-11-25 19:43:16,110 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 19:43:16,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:43:16,124 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:16,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 332 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:43:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 19:43:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-25 19:43:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 84 states have internal predecessors, (122), 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) [2021-11-25 19:43:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2021-11-25 19:43:16,183 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 19 [2021-11-25 19:43:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:16,183 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2021-11-25 19:43:16,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-11-25 19:43:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2021-11-25 19:43:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:43:16,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:16,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:43:16,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:43:16,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash -44792736, now seen corresponding path program 1 times [2021-11-25 19:43:16,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:16,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619351108] [2021-11-25 19:43:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:16,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:43:16,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619351108] [2021-11-25 19:43:16,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619351108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:16,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:43:16,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233103053] [2021-11-25 19:43:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:16,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:43:16,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:43:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:43:16,513 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2021-11-25 19:43:18,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:18,900 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2021-11-25 19:43:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:43:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 29 [2021-11-25 19:43:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:18,903 INFO L225 Difference]: With dead ends: 166 [2021-11-25 19:43:18,903 INFO L226 Difference]: Without dead ends: 164 [2021-11-25 19:43:18,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:43:18,905 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:18,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 205 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:43:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-25 19:43:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-25 19:43:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.462962962962963) internal successors, (237), 162 states have internal predecessors, (237), 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) [2021-11-25 19:43:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2021-11-25 19:43:18,933 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 29 [2021-11-25 19:43:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:18,934 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2021-11-25 19:43:18,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2021-11-25 19:43:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2021-11-25 19:43:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:43:18,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:18,937 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:43:18,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:43:18,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 25495204, now seen corresponding path program 1 times [2021-11-25 19:43:18,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:18,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135995867] [2021-11-25 19:43:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:18,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:43:19,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:19,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135995867] [2021-11-25 19:43:19,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135995867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:19,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:19,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:43:19,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645300832] [2021-11-25 19:43:19,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:19,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:19,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:19,353 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 19:43:21,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:22,157 INFO L93 Difference]: Finished difference Result 477 states and 699 transitions. [2021-11-25 19:43:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 41 [2021-11-25 19:43:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:22,161 INFO L225 Difference]: With dead ends: 477 [2021-11-25 19:43:22,161 INFO L226 Difference]: Without dead ends: 317 [2021-11-25 19:43:22,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:43:22,163 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 76 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:22,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 176 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:43:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-25 19:43:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 207. [2021-11-25 19:43:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5194174757281553) internal successors, (313), 206 states have internal predecessors, (313), 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) [2021-11-25 19:43:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 313 transitions. [2021-11-25 19:43:22,203 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 313 transitions. Word has length 41 [2021-11-25 19:43:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:22,204 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 313 transitions. [2021-11-25 19:43:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 19:43:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 313 transitions. [2021-11-25 19:43:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 19:43:22,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:22,214 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:22,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:43:22,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash 785665495, now seen corresponding path program 1 times [2021-11-25 19:43:22,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355392255] [2021-11-25 19:43:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:22,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:43:22,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:22,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355392255] [2021-11-25 19:43:22,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355392255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:22,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:43:22,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:43:22,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879839143] [2021-11-25 19:43:22,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:22,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:43:22,576 INFO L87 Difference]: Start difference. First operand 207 states and 313 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-25 19:43:24,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:25,253 INFO L93 Difference]: Finished difference Result 338 states and 509 transitions. [2021-11-25 19:43:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 42 [2021-11-25 19:43:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:25,256 INFO L225 Difference]: With dead ends: 338 [2021-11-25 19:43:25,256 INFO L226 Difference]: Without dead ends: 234 [2021-11-25 19:43:25,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:43:25,258 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:25,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 298 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:43:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-25 19:43:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2021-11-25 19:43:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.527027027027027) internal successors, (339), 222 states have internal predecessors, (339), 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) [2021-11-25 19:43:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 339 transitions. [2021-11-25 19:43:25,276 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 339 transitions. Word has length 42 [2021-11-25 19:43:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:25,276 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 339 transitions. [2021-11-25 19:43:25,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-25 19:43:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 339 transitions. [2021-11-25 19:43:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:43:25,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:25,278 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:25,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:43:25,278 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -449424451, now seen corresponding path program 2 times [2021-11-25 19:43:25,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:25,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541119642] [2021-11-25 19:43:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:25,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:25,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:25,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541119642] [2021-11-25 19:43:25,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541119642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:25,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070245685] [2021-11-25 19:43:25,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:43:25,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:25,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:25,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:45:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:45:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:45:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:45:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:45:00,859 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-25 19:45:00,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-25 19:45:00,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 159 [2021-11-25 19:45:00,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 111 [2021-11-25 19:45:01,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-25 19:45:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:01,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:45:01,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2021-11-25 19:45:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:45:01,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:45:01,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070245685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:45:01,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:45:01,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 19:45:01,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060495454] [2021-11-25 19:45:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:45:01,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:45:01,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:45:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:45:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:45:01,265 INFO L87 Difference]: Start difference. First operand 223 states and 339 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-25 19:45:03,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:45:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:45:04,021 INFO L93 Difference]: Finished difference Result 589 states and 893 transitions. [2021-11-25 19:45:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:45:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 52 [2021-11-25 19:45:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:45:04,025 INFO L225 Difference]: With dead ends: 589 [2021-11-25 19:45:04,025 INFO L226 Difference]: Without dead ends: 369 [2021-11-25 19:45:04,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:45:04,027 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:45:04,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 192 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:45:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-25 19:45:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 269. [2021-11-25 19:45:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5559701492537314) internal successors, (417), 268 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:45:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 417 transitions. [2021-11-25 19:45:04,055 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 417 transitions. Word has length 52 [2021-11-25 19:45:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:45:04,056 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 417 transitions. [2021-11-25 19:45:04,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-25 19:45:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 417 transitions. [2021-11-25 19:45:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:45:04,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:45:04,058 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:45:04,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:45:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:45:04,282 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:45:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:45:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash 642066918, now seen corresponding path program 1 times [2021-11-25 19:45:04,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:45:04,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632525781] [2021-11-25 19:45:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:45:04,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:45:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:45:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:45:04,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:45:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632525781] [2021-11-25 19:45:04,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632525781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:45:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989209333] [2021-11-25 19:45:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:45:04,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:45:04,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:45:04,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:45:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbaa7923-7cf2-4bb9-86a5-c6d24642625a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:45:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:45:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:45:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:45:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:45:05,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:45:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:45:05,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989209333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:45:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568368698] [2021-11-25 19:45:05,787 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-25 19:45:05,787 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:45:05,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:45:05,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:45:05,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:45:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:45:19,604 INFO L244 Elim1Store]: Index analysis took 478 ms