./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8 --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 6c00c1225dae238bedea18c737f72ae44fea020a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8 --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 6c00c1225dae238bedea18c737f72ae44fea020a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:59:36,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:59:36,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:59:36,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:59:36,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:59:36,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:59:36,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:59:36,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:59:36,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:59:36,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:59:36,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:59:36,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:59:36,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:59:36,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:59:36,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:59:36,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:59:36,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:59:36,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:59:36,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:59:36,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:59:36,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:59:36,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:59:36,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:59:36,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:59:36,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:59:36,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:59:36,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:59:36,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:59:36,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:59:36,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:59:36,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:59:36,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:59:36,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:59:36,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:59:36,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:59:36,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:59:36,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:59:36,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:59:36,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:59:36,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:59:36,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:59:36,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:59:36,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:59:36,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:59:36,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:59:36,477 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:59:36,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:59:36,478 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:59:36,478 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:59:36,479 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:59:36,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:59:36,489 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:59:36,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:59:36,490 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:59:36,490 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:59:36,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:59:36,491 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:59:36,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:59:36,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:59:36,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:59:36,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:59:36,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:59:36,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:59:36,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:59:36,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:59:36,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:59:36,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:59:36,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:59:36,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:59:36,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:59:36,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:59:36,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:59:36,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:36,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:59:36,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:59:36,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:59:36,497 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:59:36,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:59:36,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:59:36,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:59:36,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:59:36,499 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_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-10-13 06:59:36,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:59:36,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:59:36,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:59:36,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:59:36,859 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:59:36,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-13 06:59:36,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/faf208426/af884f78ca7949adb49f6ce70551b081/FLAGb629d4c34 [2021-10-13 06:59:37,532 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:59:37,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-13 06:59:37,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/faf208426/af884f78ca7949adb49f6ce70551b081/FLAGb629d4c34 [2021-10-13 06:59:37,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/faf208426/af884f78ca7949adb49f6ce70551b081 [2021-10-13 06:59:37,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:59:37,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:59:37,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:37,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:59:37,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:59:37,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:37" (1/1) ... [2021-10-13 06:59:37,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127ddb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:37, skipping insertion in model container [2021-10-13 06:59:37,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:37" (1/1) ... [2021-10-13 06:59:37,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:59:37,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:59:38,168 WARN L228 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_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-13 06:59:38,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:38,180 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:59:38,206 WARN L228 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_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-13 06:59:38,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:38,224 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:59:38,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38 WrapperNode [2021-10-13 06:59:38,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:38,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:38,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:59:38,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:59:38,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:38,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:59:38,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:59:38,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:59:38,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:59:38,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:59:38,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:59:38,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:59:38,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (1/1) ... [2021-10-13 06:59:38,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:38,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:38,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:59:38,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:59:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:59:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:59:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:59:38,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:59:38,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:59:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:59:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:59:39,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:59:39,155 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 06:59:39,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:39 BoogieIcfgContainer [2021-10-13 06:59:39,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:59:39,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:59:39,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:59:39,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:59:39,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:59:37" (1/3) ... [2021-10-13 06:59:39,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70643905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:39, skipping insertion in model container [2021-10-13 06:59:39,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:38" (2/3) ... [2021-10-13 06:59:39,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70643905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:39, skipping insertion in model container [2021-10-13 06:59:39,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:39" (3/3) ... [2021-10-13 06:59:39,169 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-10-13 06:59:39,176 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:59:39,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:59:39,228 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:59:39,237 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, mConcurrency=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 [2021-10-13 06:59:39,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:59:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2021-10-13 06:59:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:59:39,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:39,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:39,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1624531970, now seen corresponding path program 1 times [2021-10-13 06:59:39,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:39,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337952329] [2021-10-13 06:59:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:39,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:39,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:59:39,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914783155] [2021-10-13 06:59:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:39,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:39,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:39,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:39,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:59:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:39,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:39,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337952329] [2021-10-13 06:59:39,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:59:39,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914783155] [2021-10-13 06:59:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914783155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:39,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:39,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 06:59:39,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424602863] [2021-10-13 06:59:39,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:39,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:39,781 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 2.5) internal successors, (10), 3 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) [2021-10-13 06:59:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:39,830 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2021-10-13 06:59:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 8 [2021-10-13 06:59:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:39,839 INFO L225 Difference]: With dead ends: 22 [2021-10-13 06:59:39,839 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 06:59:39,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 06:59:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 06:59:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-13 06:59:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-13 06:59:39,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-10-13 06:59:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:39,874 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-13 06:59:39,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-10-13 06:59:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-13 06:59:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 06:59:39,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:39,876 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:39,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 06:59:40,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 06:59:40,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -132988094, now seen corresponding path program 1 times [2021-10-13 06:59:40,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:40,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797206888] [2021-10-13 06:59:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:40,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:40,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:59:40,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813011913] [2021-10-13 06:59:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:40,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:40,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:40,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 06:59:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:59:40,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:59:40,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797206888] [2021-10-13 06:59:40,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:59:40,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813011913] [2021-10-13 06:59:40,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813011913] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:40,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:40,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:59:40,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321178974] [2021-10-13 06:59:40,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:40,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:40,320 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-13 06:59:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:40,377 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-10-13 06:59:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:40,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) Word has length 10 [2021-10-13 06:59:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:40,387 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:59:40,388 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 06:59:40,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 06:59:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 06:59:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-10-13 06:59:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-13 06:59:40,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-10-13 06:59:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:40,397 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-13 06:59:40,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-13 06:59:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-13 06:59:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:59:40,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:40,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:40,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:40,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:40,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1151414046, now seen corresponding path program 1 times [2021-10-13 06:59:40,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:40,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546406618] [2021-10-13 06:59:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:40,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:40,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:59:40,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416988338] [2021-10-13 06:59:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:40,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:40,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:40,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 06:59:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:59:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:59:40,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:40,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546406618] [2021-10-13 06:59:40,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:59:40,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416988338] [2021-10-13 06:59:40,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416988338] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:40,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:40,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:59:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585104494] [2021-10-13 06:59:40,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:40,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:40,890 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-13 06:59:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:40,913 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-13 06:59:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 16 [2021-10-13 06:59:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:40,915 INFO L225 Difference]: With dead ends: 25 [2021-10-13 06:59:40,916 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 06:59:40,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 06:59:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 06:59:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-10-13 06:59:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 06:59:40,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2021-10-13 06:59:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 06:59:40,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-13 06:59:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 06:59:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 06:59:40,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:40,932 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:40,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:41,154 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2095232066, now seen corresponding path program 1 times [2021-10-13 06:59:41,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:41,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479161984] [2021-10-13 06:59:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:41,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:41,210 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:59:41,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917102067] [2021-10-13 06:59:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:41,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:41,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:59:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:59:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:59:41,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:41,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479161984] [2021-10-13 06:59:41,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:59:41,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917102067] [2021-10-13 06:59:41,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917102067] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:41,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136253662] [2021-10-13 06:59:41,510 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 06:59:41,510 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:59:41,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:59:41,522 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:59:41,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:59:41,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,608 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:59:41,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:59:41,624 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:59:41,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:59:41,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 06:59:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:41,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:59:41,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:59:41,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:59:41,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:59:41,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:41,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:41,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 06:59:41,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:59:41,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:134 [2021-10-13 06:59:41,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 06:59:42,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:42,041 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_23| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) 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.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:608) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-13 06:59:42,044 INFO L168 Benchmark]: Toolchain (without parser) took 4170.27 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 47.3 MB in the beginning and 56.3 MB in the end (delta: -9.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:42,045 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:42,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.97 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 62.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:42,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.43 ms. Allocated memory is still 88.1 MB. Free memory was 62.7 MB in the beginning and 60.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:42,047 INFO L168 Benchmark]: Boogie Preprocessor took 36.45 ms. Allocated memory is still 88.1 MB. Free memory was 60.9 MB in the beginning and 59.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:42,048 INFO L168 Benchmark]: RCFGBuilder took 844.05 ms. Allocated memory is still 88.1 MB. Free memory was 59.4 MB in the beginning and 38.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:42,048 INFO L168 Benchmark]: TraceAbstraction took 2882.07 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 37.8 MB in the beginning and 56.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:42,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.97 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 62.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.43 ms. Allocated memory is still 88.1 MB. Free memory was 62.7 MB in the beginning and 60.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.45 ms. Allocated memory is still 88.1 MB. Free memory was 60.9 MB in the beginning and 59.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 844.05 ms. Allocated memory is still 88.1 MB. Free memory was 59.4 MB in the beginning and 38.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2882.07 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 37.8 MB in the beginning and 56.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_23| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_23|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:59:42,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:59:44,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:59:44,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:59:44,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:59:44,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:59:44,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:59:44,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:59:44,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:59:44,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:59:44,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:59:44,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:59:44,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:59:44,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:59:44,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:59:44,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:59:44,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:59:44,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:59:44,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:59:44,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:59:44,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:59:44,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:59:44,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:59:44,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:59:44,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:59:45,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:59:45,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:59:45,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:59:45,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:59:45,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:59:45,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:59:45,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:59:45,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:59:45,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:59:45,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:59:45,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:59:45,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:59:45,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:59:45,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:59:45,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:59:45,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:59:45,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:59:45,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:59:45,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:59:45,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:59:45,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:59:45,087 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:59:45,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:59:45,088 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:59:45,088 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:59:45,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:59:45,089 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:59:45,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:59:45,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:59:45,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:59:45,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:59:45,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:59:45,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:59:45,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:59:45,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:59:45,094 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:59:45,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:59:45,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:59:45,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:59:45,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:59:45,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:59:45,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:59:45,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:59:45,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:59:45,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:45,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:59:45,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:59:45,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:59:45,098 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:59:45,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:45,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:59:45,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:59:45,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:59:45,100 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-10-13 06:59:45,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:59:45,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:59:45,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:59:45,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:59:45,646 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:59:45,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-13 06:59:45,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/277576eed/06cb65d336034feeac66c61bb174e5ed/FLAGfa8dd92c5 [2021-10-13 06:59:46,347 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:59:46,348 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-13 06:59:46,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/277576eed/06cb65d336034feeac66c61bb174e5ed/FLAGfa8dd92c5 [2021-10-13 06:59:46,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/data/277576eed/06cb65d336034feeac66c61bb174e5ed [2021-10-13 06:59:46,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:59:46,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:59:46,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:46,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:59:46,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:59:46,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:46" (1/1) ... [2021-10-13 06:59:46,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b27b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:46, skipping insertion in model container [2021-10-13 06:59:46,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:46" (1/1) ... [2021-10-13 06:59:46,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:59:46,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:59:46,987 WARN L228 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_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-13 06:59:46,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:47,009 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:59:47,085 WARN L228 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_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-13 06:59:47,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:47,103 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:59:47,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47 WrapperNode [2021-10-13 06:59:47,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:47,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:47,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:59:47,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:59:47,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:47,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:59:47,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:59:47,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:59:47,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:59:47,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:59:47,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:59:47,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:59:47,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (1/1) ... [2021-10-13 06:59:47,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:47,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:59:47,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:59:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:59:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:59:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:59:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:59:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:59:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:59:47,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:59:48,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:59:48,437 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 06:59:48,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:48 BoogieIcfgContainer [2021-10-13 06:59:48,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:59:48,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:59:48,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:59:48,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:59:48,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:59:46" (1/3) ... [2021-10-13 06:59:48,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae99ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:48, skipping insertion in model container [2021-10-13 06:59:48,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:47" (2/3) ... [2021-10-13 06:59:48,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae99ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:48, skipping insertion in model container [2021-10-13 06:59:48,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:48" (3/3) ... [2021-10-13 06:59:48,450 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-10-13 06:59:48,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:59:48,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:59:48,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:59:48,512 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, mConcurrency=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 [2021-10-13 06:59:48,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:59:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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) [2021-10-13 06:59:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:59:48,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:48,535 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:48,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-13 06:59:48,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:48,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775024941] [2021-10-13 06:59:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:48,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:48,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:48,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:59:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:59:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:49,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:49,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775024941] [2021-10-13 06:59:49,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775024941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:49,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:49,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:59:49,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361172351] [2021-10-13 06:59:49,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:59:49,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:59:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:59:49,052 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-10-13 06:59:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:49,069 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-13 06:59:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:59:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-10-13 06:59:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:49,078 INFO L225 Difference]: With dead ends: 56 [2021-10-13 06:59:49,078 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 06:59:49,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:59:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 06:59:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 06:59:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 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) [2021-10-13 06:59:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-13 06:59:49,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-13 06:59:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:49,113 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-13 06:59:49,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-10-13 06:59:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-13 06:59:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:59:49,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:49,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:49,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:49,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:49,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-13 06:59:49,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:49,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530122448] [2021-10-13 06:59:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:49,340 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:49,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:49,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:59:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:49,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:49,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530122448] [2021-10-13 06:59:49,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530122448] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:49,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:49,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:59:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835597442] [2021-10-13 06:59:49,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:49,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:49,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:49,947 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-10-13 06:59:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:49,993 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-10-13 06:59:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 17 [2021-10-13 06:59:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:49,997 INFO L225 Difference]: With dead ends: 51 [2021-10-13 06:59:49,997 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 06:59:49,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 06:59:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 06:59:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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) [2021-10-13 06:59:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-13 06:59:50,016 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2021-10-13 06:59:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:50,016 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-13 06:59:50,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-10-13 06:59:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-13 06:59:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 06:59:50,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:50,020 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:50,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:50,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -790773651, now seen corresponding path program 1 times [2021-10-13 06:59:50,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:50,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186102687] [2021-10-13 06:59:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:50,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:50,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:50,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:50,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:59:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:50,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:50,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186102687] [2021-10-13 06:59:50,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186102687] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708509062] [2021-10-13 06:59:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:50,825 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:50,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:50,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 06:59:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 06:59:51,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 06:59:51,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708509062] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:51,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 06:59:51,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-10-13 06:59:51,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463673438] [2021-10-13 06:59:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:51,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:59:51,138 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) 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) [2021-10-13 06:59:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:51,558 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-10-13 06:59:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) 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 21 [2021-10-13 06:59:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:51,560 INFO L225 Difference]: With dead ends: 67 [2021-10-13 06:59:51,560 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 06:59:51,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:59:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 06:59:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-13 06:59:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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) [2021-10-13 06:59:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-13 06:59:51,569 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2021-10-13 06:59:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:51,569 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-13 06:59:51,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) 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) [2021-10-13 06:59:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-10-13 06:59:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 06:59:51,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:51,571 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:51,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:51,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 06:59:51,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:51,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash -532548631, now seen corresponding path program 1 times [2021-10-13 06:59:51,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:51,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951814982] [2021-10-13 06:59:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:51,985 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:51,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:59:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:52,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:52,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:52,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951814982] [2021-10-13 06:59:52,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951814982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:52,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354476174] [2021-10-13 06:59:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:52,325 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:52,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:52,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:59:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:52,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:52,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354476174] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:52,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723226532] [2021-10-13 06:59:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:52,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:52,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:59:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:59:52,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 06:59:53,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 06:59:53,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723226532] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:53,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 06:59:53,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-13 06:59:53,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832517950] [2021-10-13 06:59:53,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 06:59:53,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 06:59:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:59:53,475 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-10-13 06:59:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:54,309 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-13 06:59:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:59:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 21 [2021-10-13 06:59:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:54,313 INFO L225 Difference]: With dead ends: 98 [2021-10-13 06:59:54,313 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 06:59:54,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-13 06:59:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 06:59:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-10-13 06:59:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 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) [2021-10-13 06:59:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2021-10-13 06:59:54,325 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 21 [2021-10-13 06:59:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:54,326 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2021-10-13 06:59:54,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-10-13 06:59:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2021-10-13 06:59:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 06:59:54,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:54,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:54,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:54,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:54,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:54,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -781348630, now seen corresponding path program 1 times [2021-10-13 06:59:54,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:54,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458944320] [2021-10-13 06:59:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:54,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:54,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:54,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:59:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:59:55,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:59:55,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:55,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458944320] [2021-10-13 06:59:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458944320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:55,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1858324217] [2021-10-13 06:59:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:55,416 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:55,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:55,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 06:59:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:59:56,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:59:56,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1858324217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:56,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928939946] [2021-10-13 06:59:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:56,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:56,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:56,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:56,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 06:59:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:59:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:59:56,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928939946] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:56,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 06:59:56,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-10-13 06:59:56,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420631449] [2021-10-13 06:59:56,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:56,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:59:56,756 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-10-13 06:59:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:56,864 INFO L93 Difference]: Finished difference Result 131 states and 191 transitions. [2021-10-13 06:59:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2021-10-13 06:59:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:56,867 INFO L225 Difference]: With dead ends: 131 [2021-10-13 06:59:56,867 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 06:59:56,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:59:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 06:59:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-13 06:59:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 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) [2021-10-13 06:59:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-10-13 06:59:56,879 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 24 [2021-10-13 06:59:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:56,879 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-10-13 06:59:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-10-13 06:59:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-10-13 06:59:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 06:59:56,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:56,882 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 06:59:56,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:57,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:57,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:57,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:57,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:59:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -358269621, now seen corresponding path program 1 times [2021-10-13 06:59:57,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:57,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456180217] [2021-10-13 06:59:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:57,488 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:57,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:59:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:59:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:59:58,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456180217] [2021-10-13 06:59:58,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456180217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242003177] [2021-10-13 06:59:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:58,186 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:59:58,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:59:58,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 06:59:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:59:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:59:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1242003177] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:58,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422358545] [2021-10-13 06:59:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:58,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:58,780 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 06:59:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:59:59,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:59:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422358545] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:59,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:59:59,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-10-13 06:59:59,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214357437] [2021-10-13 06:59:59,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 06:59:59,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 06:59:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 06:59:59,761 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:01,350 INFO L93 Difference]: Finished difference Result 245 states and 340 transitions. [2021-10-13 07:00:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:00:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 07:00:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:01,354 INFO L225 Difference]: With dead ends: 245 [2021-10-13 07:00:01,355 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 07:00:01,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:00:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 07:00:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2021-10-13 07:00:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.403225806451613) internal successors, (174), 124 states have internal predecessors, (174), 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) [2021-10-13 07:00:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2021-10-13 07:00:01,371 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 39 [2021-10-13 07:00:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:01,371 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2021-10-13 07:00:01,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2021-10-13 07:00:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:00:01,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:01,374 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-10-13 07:00:01,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:01,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:01,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 07:00:01,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:01,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1109413569, now seen corresponding path program 1 times [2021-10-13 07:00:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:01,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377603829] [2021-10-13 07:00:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:01,991 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:01,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:01,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:00:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:02,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:00:02,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:00:03,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:03,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377603829] [2021-10-13 07:00:03,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377603829] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:03,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [925970774] [2021-10-13 07:00:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:03,144 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:03,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:03,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:03,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:00:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:00:04,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:00:05,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [925970774] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:05,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347196568] [2021-10-13 07:00:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:05,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:05,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:05,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:05,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:00:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:00:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-13 07:00:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-13 07:00:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347196568] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:06,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:00:06,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9, 9, 9] total 18 [2021-10-13 07:00:06,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011688615] [2021-10-13 07:00:06,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:06,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:00:06,251 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-10-13 07:00:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:06,298 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2021-10-13 07:00:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:00:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 47 [2021-10-13 07:00:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:06,301 INFO L225 Difference]: With dead ends: 167 [2021-10-13 07:00:06,301 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 07:00:06,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 324.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:00:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 07:00:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-10-13 07:00:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3846153846153846) internal successors, (180), 130 states have internal predecessors, (180), 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) [2021-10-13 07:00:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-10-13 07:00:06,315 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 47 [2021-10-13 07:00:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:06,315 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-10-13 07:00:06,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-10-13 07:00:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-10-13 07:00:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:00:06,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:06,319 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-10-13 07:00:06,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:06,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:06,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:06,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:06,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1522869053, now seen corresponding path program 1 times [2021-10-13 07:00:06,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:06,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627796383] [2021-10-13 07:00:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:06,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:06,939 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:06,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:00:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 07:00:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 07:00:08,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:08,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627796383] [2021-10-13 07:00:08,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627796383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:08,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563171415] [2021-10-13 07:00:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:08,167 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:08,173 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:08,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:00:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 07:00:09,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 07:00:10,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1563171415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:10,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858664974] [2021-10-13 07:00:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:10,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:10,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:10,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 07:00:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:00:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 07:00:11,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 07:00:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858664974] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:11,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:00:11,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 5] total 21 [2021-10-13 07:00:11,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656725959] [2021-10-13 07:00:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 07:00:11,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 07:00:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:00:11,674 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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) [2021-10-13 07:00:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:12,666 INFO L93 Difference]: Finished difference Result 309 states and 433 transitions. [2021-10-13 07:00:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:00:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-13 07:00:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:12,669 INFO L225 Difference]: With dead ends: 309 [2021-10-13 07:00:12,669 INFO L226 Difference]: Without dead ends: 193 [2021-10-13 07:00:12,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-10-13 07:00:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-13 07:00:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-10-13 07:00:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2857142857142858) internal successors, (225), 175 states have internal predecessors, (225), 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) [2021-10-13 07:00:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-10-13 07:00:12,700 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 51 [2021-10-13 07:00:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:12,701 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-10-13 07:00:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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) [2021-10-13 07:00:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-10-13 07:00:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 07:00:12,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:12,709 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:12,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:12,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:13,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:13,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:13,313 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -598864586, now seen corresponding path program 1 times [2021-10-13 07:00:13,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:13,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559315918] [2021-10-13 07:00:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:13,315 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:13,316 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:13,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:00:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-13 07:00:14,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-13 07:00:14,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559315918] [2021-10-13 07:00:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559315918] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016946024] [2021-10-13 07:00:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:14,408 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:14,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:00:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-13 07:00:15,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-13 07:00:15,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016946024] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:15,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491691168] [2021-10-13 07:00:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:15,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:15,850 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 07:00:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:00:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-10-13 07:00:16,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-10-13 07:00:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491691168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:17,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:00:17,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 18 [2021-10-13 07:00:17,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645658989] [2021-10-13 07:00:17,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 07:00:17,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 07:00:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:00:17,153 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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) [2021-10-13 07:00:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:18,541 INFO L93 Difference]: Finished difference Result 481 states and 685 transitions. [2021-10-13 07:00:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 07:00:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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 80 [2021-10-13 07:00:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:18,543 INFO L225 Difference]: With dead ends: 481 [2021-10-13 07:00:18,543 INFO L226 Difference]: Without dead ends: 343 [2021-10-13 07:00:18,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 659.6ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-10-13 07:00:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-10-13 07:00:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 220. [2021-10-13 07:00:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.1461187214611872) internal successors, (251), 219 states have internal predecessors, (251), 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) [2021-10-13 07:00:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2021-10-13 07:00:18,563 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 80 [2021-10-13 07:00:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:18,564 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2021-10-13 07:00:18,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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) [2021-10-13 07:00:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2021-10-13 07:00:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-13 07:00:18,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:18,567 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:18,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:18,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:18,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:19,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:19,174 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1411129585, now seen corresponding path program 1 times [2021-10-13 07:00:19,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:19,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567816100] [2021-10-13 07:00:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:19,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:19,176 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 07:00:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:20,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:21,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:21,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567816100] [2021-10-13 07:00:21,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567816100] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:21,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1510377114] [2021-10-13 07:00:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:21,026 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:21,033 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:21,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 07:00:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:21,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:22,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1510377114] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:22,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317977304] [2021-10-13 07:00:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:22,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:22,610 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:22,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 07:00:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:24,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-13 07:00:24,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317977304] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:24,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:00:24,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-13 07:00:24,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889508765] [2021-10-13 07:00:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:00:24,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:00:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:00:24,595 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2021-10-13 07:00:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:26,916 INFO L93 Difference]: Finished difference Result 1070 states and 1343 transitions. [2021-10-13 07:00:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:00:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-10-13 07:00:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:26,923 INFO L225 Difference]: With dead ends: 1070 [2021-10-13 07:00:26,923 INFO L226 Difference]: Without dead ends: 939 [2021-10-13 07:00:26,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:00:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-10-13 07:00:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 558. [2021-10-13 07:00:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.272890484739677) internal successors, (709), 557 states have internal predecessors, (709), 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) [2021-10-13 07:00:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 709 transitions. [2021-10-13 07:00:26,988 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 709 transitions. Word has length 139 [2021-10-13 07:00:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 709 transitions. [2021-10-13 07:00:26,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2021-10-13 07:00:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 709 transitions. [2021-10-13 07:00:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-13 07:00:26,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:26,992 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:26,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-13 07:00:27,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:27,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:27,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:27,596 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 2 times [2021-10-13 07:00:27,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:27,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160317063] [2021-10-13 07:00:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:00:27,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:27,613 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:27,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 07:00:28,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:00:28,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:00:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:30,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160317063] [2021-10-13 07:00:30,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160317063] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209520845] [2021-10-13 07:00:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:00:30,021 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:30,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:30,022 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:30,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 07:00:33,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:00:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:00:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:33,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209520845] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:33,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789024293] [2021-10-13 07:00:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:00:33,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:33,970 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:33,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 07:00:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:00:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:00:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:00:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:38,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-13 07:00:38,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789024293] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:38,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:00:38,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-13 07:00:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924660143] [2021-10-13 07:00:38,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:00:38,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:00:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:00:38,786 INFO L87 Difference]: Start difference. First operand 558 states and 709 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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) [2021-10-13 07:00:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:39,114 INFO L93 Difference]: Finished difference Result 724 states and 921 transitions. [2021-10-13 07:00:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:00:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-10-13 07:00:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:39,119 INFO L225 Difference]: With dead ends: 724 [2021-10-13 07:00:39,119 INFO L226 Difference]: Without dead ends: 570 [2021-10-13 07:00:39,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:00:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-10-13 07:00:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-10-13 07:00:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.2671353251318103) internal successors, (721), 569 states have internal predecessors, (721), 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) [2021-10-13 07:00:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 721 transitions. [2021-10-13 07:00:39,162 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 721 transitions. Word has length 139 [2021-10-13 07:00:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:39,162 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 721 transitions. [2021-10-13 07:00:39,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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) [2021-10-13 07:00:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 721 transitions. [2021-10-13 07:00:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-13 07:00:39,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:39,166 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:39,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 07:00:39,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-10-13 07:00:39,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-13 07:00:39,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:39,780 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:00:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 532363753, now seen corresponding path program 3 times [2021-10-13 07:00:39,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:39,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766580474] [2021-10-13 07:00:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:00:39,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:39,781 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 07:00:44,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 07:00:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:00:44,593 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:00:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:00:46,319 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:00:46,320 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:00:46,320 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:46,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:46,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:46,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:00:46,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:00:46 BoogieIcfgContainer [2021-10-13 07:00:46,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:00:46,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:00:46,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:00:46,655 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:00:46,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:48" (3/4) ... [2021-10-13 07:00:46,657 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:00:46,770 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:00:46,770 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:00:46,772 INFO L168 Benchmark]: Toolchain (without parser) took 60099.76 ms. Allocated memory was 56.6 MB in the beginning and 96.5 MB in the end (delta: 39.8 MB). Free memory was 34.6 MB in the beginning and 31.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,772 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:46,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 427.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 39.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,773 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.61 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 37.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:46,774 INFO L168 Benchmark]: Boogie Preprocessor took 77.48 ms. Allocated memory is still 56.6 MB. Free memory was 37.3 MB in the beginning and 35.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,774 INFO L168 Benchmark]: RCFGBuilder took 1207.26 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 35.7 MB in the beginning and 61.2 MB in the end (delta: -25.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,775 INFO L168 Benchmark]: TraceAbstraction took 58212.48 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 60.9 MB in the beginning and 42.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,775 INFO L168 Benchmark]: Witness Printer took 115.89 ms. Allocated memory is still 96.5 MB. Free memory was 42.7 MB in the beginning and 31.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:46,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 427.61 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 39.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.61 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 37.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.48 ms. Allocated memory is still 56.6 MB. Free memory was 37.3 MB in the beginning and 35.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1207.26 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 35.7 MB in the beginning and 61.2 MB in the end (delta: -25.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58212.48 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 60.9 MB in the beginning and 42.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * Witness Printer took 115.89 ms. Allocated memory is still 96.5 MB. Free memory was 42.7 MB in the beginning and 31.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[10]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 10) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<10 -1) [L57] x[10 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58024.1ms, OverallIterations: 12, TraceHistogramMax: 10, EmptinessCheckTime: 35.1ms, AutomataDifference: 8176.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 400 SDtfs, 1084 SDslu, 1643 SDs, 0 SdLazy, 1479 SolverSat, 438 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5699.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3366 GetRequests, 3230 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3210.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=570occurred in iteration=11, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 244.8ms AutomataMinimizationTime, 11 MinimizatonAttempts, 612 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 410.5ms SsaConstructionTime, 18478.1ms SatisfiabilityAnalysisTime, 14445.7ms InterpolantComputationTime, 1841 NumberOfCodeBlocks, 1841 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 3336 ConstructedInterpolants, 0 QuantifiedInterpolants, 5149 SizeOfPredicates, 25 NumberOfNonLiveVariables, 3586 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 56 InterpolantComputations, 12 PerfectInterpolantSequences, 7578/8770 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:00:46,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f261ad-355b-4ea4-b1ac-2a90b1f113f0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...