./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label25.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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/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 699ecca4c05e82af9ddaf76f64fe18abd85263cf30f7f15e631a0ddff4b0faf4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:16:17,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:16:17,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:16:17,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:16:17,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:16:17,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:16:17,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:16:17,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:16:17,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:16:17,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:16:17,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:16:17,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:16:17,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:16:17,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:16:17,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:16:17,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:16:17,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:16:17,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:16:17,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:16:17,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:16:17,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:16:17,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:16:17,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:16:17,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:16:17,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:16:17,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:16:17,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:16:17,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:16:17,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:16:17,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:16:17,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:16:17,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:16:17,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:16:17,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:16:17,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:16:17,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:16:17,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:16:17,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:16:17,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:16:17,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:16:17,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:16:17,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:16:17,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:16:17,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:16:17,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:16:17,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:16:17,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:16:17,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:16:17,262 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:16:17,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:16:17,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:16:17,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:16:17,263 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:16:17,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:16:17,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:16:17,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:16:17,263 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:16:17,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:16:17,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:16:17,264 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:16:17,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:16:17,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:16:17,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:16:17,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:16:17,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:16:17,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:16:17,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:16:17,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:16:17,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:16:17,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:16:17,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:16:17,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:16:17,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:16:17,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:16:17,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:16:17,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:16:17,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:16:17,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:16:17,269 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:16:17,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:16:17,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:16:17,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:16:17,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:16:17,270 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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 699ecca4c05e82af9ddaf76f64fe18abd85263cf30f7f15e631a0ddff4b0faf4 [2021-11-25 20:16:17,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:16:17,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:16:17,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:16:17,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:16:17,601 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:16:17,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/eca-rers2012/Problem10_label25.c [2021-11-25 20:16:17,675 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/data/76fb002b0/0f3eee8591a045289fcfbc4bf90ca2ec/FLAGf021b53dc [2021-11-25 20:16:18,234 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:16:18,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/sv-benchmarks/c/eca-rers2012/Problem10_label25.c [2021-11-25 20:16:18,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/data/76fb002b0/0f3eee8591a045289fcfbc4bf90ca2ec/FLAGf021b53dc [2021-11-25 20:16:18,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/data/76fb002b0/0f3eee8591a045289fcfbc4bf90ca2ec [2021-11-25 20:16:18,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:16:18,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:16:18,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:16:18,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:16:18,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:16:18,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:16:18" (1/1) ... [2021-11-25 20:16:18,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e0724cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:18, skipping insertion in model container [2021-11-25 20:16:18,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:16:18" (1/1) ... [2021-11-25 20:16:18,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:16:18,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:16:19,053 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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/sv-benchmarks/c/eca-rers2012/Problem10_label25.c[7284,7297] [2021-11-25 20:16:19,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:16:19,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:16:19,295 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_67b34580-b30a-4f16-acc0-4c0a997f4b0b/sv-benchmarks/c/eca-rers2012/Problem10_label25.c[7284,7297] [2021-11-25 20:16:19,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:16:19,410 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:16:19,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19 WrapperNode [2021-11-25 20:16:19,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:16:19,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:16:19,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:16:19,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:16:19,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,520 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 597 [2021-11-25 20:16:19,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:16:19,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:16:19,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:16:19,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:16:19,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:16:19,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:16:19,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:16:19,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:16:19,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (1/1) ... [2021-11-25 20:16:19,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:16:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:19,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:16:19,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:16:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:16:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:16:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:16:19,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:16:19,835 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:16:19,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:16:20,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:16:22,783 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:16:22,783 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:16:22,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:16:22 BoogieIcfgContainer [2021-11-25 20:16:22,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:16:22,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:16:22,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:16:22,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:16:22,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:16:18" (1/3) ... [2021-11-25 20:16:22,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b61170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:16:22, skipping insertion in model container [2021-11-25 20:16:22,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:16:19" (2/3) ... [2021-11-25 20:16:22,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b61170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:16:22, skipping insertion in model container [2021-11-25 20:16:22,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:16:22" (3/3) ... [2021-11-25 20:16:22,797 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2021-11-25 20:16:22,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:16:22,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:16:22,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:16:22,880 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 20:16:22,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:16:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 20:16:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:16:22,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:22,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:16:22,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash 885325176, now seen corresponding path program 1 times [2021-11-25 20:16:22,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:22,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68111257] [2021-11-25 20:16:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:22,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:23,130 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 20:16:23,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68111257] [2021-11-25 20:16:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68111257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:23,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:16:23,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:16:23,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864282174] [2021-11-25 20:16:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:23,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:16:23,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:16:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:16:23,168 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 20:16:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:23,237 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-25 20:16:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:16:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 20:16:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:23,247 INFO L225 Difference]: With dead ends: 23 [2021-11-25 20:16:23,248 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 20:16:23,250 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 20:16:23,255 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:23,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:16:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 20:16:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-25 20:16:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 20:16:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-25 20:16:23,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-11-25 20:16:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:23,292 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-25 20:16:23,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 20:16:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-25 20:16:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:16:23,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:23,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:16:23,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:16:23,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1469196587, now seen corresponding path program 1 times [2021-11-25 20:16:23,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:23,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818681691] [2021-11-25 20:16:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:23,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:23,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818681691] [2021-11-25 20:16:23,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818681691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:23,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763758300] [2021-11-25 20:16:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:23,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:23,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:23,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:23,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:16:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:16:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:37,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:53,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:16:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573888443] [2021-11-25 20:16:53,031 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:53,031 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:53,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:53,040 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:53,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:58,918 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2021-11-25 20:17:10,463 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 38175 conjuctions. This might take some time... [2021-11-25 20:17:14,362 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 250 conjuctions. [2021-11-25 20:17:14,387 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2021-11-25 20:17:27,929 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 38175 conjuctions. This might take some time... [2021-11-25 20:17:31,896 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 250 conjuctions. [2021-11-25 20:17:47,446 FATAL L? ?]: Ignoring exception! java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-11-25 20:17:47,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:47,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-25 20:17:47,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430863071] [2021-11-25 20:17:47,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:47,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:47,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:47,453 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20:17:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:47,582 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-25 20:17:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:17:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-25 20:17:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:47,583 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:17:47,584 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:17:47,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:17:47,586 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:47,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:17:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:17:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-25 20:17:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 20:17:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-25 20:17:47,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-11-25 20:17:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:47,590 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-25 20:17:47,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20:17:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-25 20:17:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:17:47,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:47,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2021-11-25 20:17:47,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:47,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:47,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1280556194, now seen corresponding path program 2 times [2021-11-25 20:17:47,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:47,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794850207] [2021-11-25 20:17:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:47,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:17:48,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794850207] [2021-11-25 20:17:48,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794850207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986311963] [2021-11-25 20:17:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:17:48,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:48,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:48,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67b34580-b30a-4f16-acc0-4c0a997f4b0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:17:48,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:17:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:48,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 20:17:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates...