./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-reverse.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_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/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_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/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_0b17fd2b-3515-4974-ad86-f17d588ca10d/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 c8f03aacd6a0ba176a4c5bf885e9983ba429f85c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/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_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/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_0b17fd2b-3515-4974-ad86-f17d588ca10d/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 c8f03aacd6a0ba176a4c5bf885e9983ba429f85c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:18:24,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:18:24,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:18:24,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:18:24,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:18:24,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:18:24,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:18:24,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:18:24,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:18:24,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:18:24,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:18:24,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:18:24,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:18:24,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:18:24,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:18:24,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:18:24,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:18:24,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:18:24,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:18:24,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:18:24,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:18:24,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:18:24,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:18:24,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:18:24,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:18:24,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:18:24,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:18:24,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:18:24,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:18:24,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:18:24,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:18:24,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:18:24,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:18:24,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:18:24,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:18:24,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:18:24,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:18:24,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:18:24,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:18:24,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:18:24,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:18:24,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:18:24,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:18:24,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:18:24,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:18:24,530 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:18:24,530 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:18:24,530 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:18:24,530 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:18:24,533 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:18:24,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:18:24,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:18:24,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:18:24,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:18:24,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:18:24,535 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:18:24,535 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:18:24,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:18:24,536 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:18:24,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:18:24,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:18:24,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:18:24,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:18:24,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:18:24,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:18:24,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:18:24,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:18:24,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:18:24,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:18:24,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:18:24,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:18:24,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:18:24,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:24,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:18:24,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:18:24,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:18:24,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:18:24,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:18:24,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:18:24,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:18:24,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:18:24,542 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-10-13 07:18:24,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:18:24,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:18:24,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:18:24,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:18:24,931 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:18:24,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 07:18:25,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/f66de0cbd/9143dcd440894344a825fb1f722b2667/FLAGdae2ece3c [2021-10-13 07:18:25,657 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:18:25,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 07:18:25,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/f66de0cbd/9143dcd440894344a825fb1f722b2667/FLAGdae2ece3c [2021-10-13 07:18:25,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/f66de0cbd/9143dcd440894344a825fb1f722b2667 [2021-10-13 07:18:25,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:18:25,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:18:25,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:25,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:18:25,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:18:25,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:25" (1/1) ... [2021-10-13 07:18:25,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7b19aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:25, skipping insertion in model container [2021-10-13 07:18:25,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:25" (1/1) ... [2021-10-13 07:18:25,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:18:26,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:18:26,420 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 07:18:26,430 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 07:18:26,440 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 07:18:26,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:26,462 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:18:26,516 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 07:18:26,518 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 07:18:26,531 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 07:18:26,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:26,575 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:18:26,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26 WrapperNode [2021-10-13 07:18:26,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:26,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:26,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:18:26,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:18:26,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:26,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:18:26,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:18:26,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:18:26,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:18:26,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:18:26,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:18:26,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:18:26,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (1/1) ... [2021-10-13 07:18:26,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:26,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:26,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:18:26,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:18:26,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:18:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:18:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:18:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:18:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:18:26,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:18:27,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:18:27,752 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:18:27,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:27 BoogieIcfgContainer [2021-10-13 07:18:27,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:18:27,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:18:27,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:18:27,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:18:27,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:25" (1/3) ... [2021-10-13 07:18:27,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1797e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:27, skipping insertion in model container [2021-10-13 07:18:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:26" (2/3) ... [2021-10-13 07:18:27,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1797e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:27, skipping insertion in model container [2021-10-13 07:18:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:27" (3/3) ... [2021-10-13 07:18:27,765 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-13 07:18:27,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:18:27,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:18:27,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:18:27,837 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 07:18:27,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:18:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:18:27,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:27,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:18:27,864 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:27,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1014884411, now seen corresponding path program 1 times [2021-10-13 07:18:27,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:27,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139903178] [2021-10-13 07:18:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:27,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:28,097 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 07:18:28,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:28,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139903178] [2021-10-13 07:18:28,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139903178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:28,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:28,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:18:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601296495] [2021-10-13 07:18:28,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:18:28,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:18:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:18:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:28,130 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:28,149 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2021-10-13 07:18:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:18:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:18:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:28,159 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:18:28,160 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:18:28,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:18:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:18:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 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 07:18:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-13 07:18:28,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-10-13 07:18:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:28,198 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-13 07:18:28,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-13 07:18:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:18:28,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:28,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:28,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:18:28,201 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1773969138, now seen corresponding path program 1 times [2021-10-13 07:18:28,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:28,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108033031] [2021-10-13 07:18:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:28,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:28,387 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 07:18:28,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:28,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108033031] [2021-10-13 07:18:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108033031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:28,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:18:28,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477078400] [2021-10-13 07:18:28,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:18:28,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:18:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:18:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:18:28,392 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:28,891 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-13 07:18:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:18:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:28,893 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:18:28,893 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:18:28,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:18:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:18:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-13 07:18:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 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 07:18:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-13 07:18:28,900 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2021-10-13 07:18:28,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:28,901 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-13 07:18:28,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-13 07:18:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:18:28,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:28,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:18:28,903 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:28,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1773970388, now seen corresponding path program 1 times [2021-10-13 07:18:28,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:28,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340282936] [2021-10-13 07:18:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:28,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:28,952 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 07:18:28,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:28,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340282936] [2021-10-13 07:18:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340282936] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:28,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:18:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053480672] [2021-10-13 07:18:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:18:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:18:28,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:18:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:28,956 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 07:18:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:29,197 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-13 07:18:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:18:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 07:18:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:29,199 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:18:29,199 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 07:18:29,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:18:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 07:18:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-10-13 07:18:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 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 07:18:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-13 07:18:29,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2021-10-13 07:18:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:29,207 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-13 07:18:29,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 07:18:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-13 07:18:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:18:29,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:29,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:29,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:18:29,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1654140644, now seen corresponding path program 1 times [2021-10-13 07:18:29,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:18:29,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593317559] [2021-10-13 07:18:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:29,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:18:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:29,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:18:29,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593317559] [2021-10-13 07:18:29,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593317559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:18:29,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366725835] [2021-10-13 07:18:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:29,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:29,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:29,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:18:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 07:18:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 07:18:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 07:18:29,609 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 07:18:29,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-13 07:18:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,151 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-13 07:18:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 583 treesize of output 578 [2021-10-13 07:18:32,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 659 [2021-10-13 07:18:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 621 treesize of output 548 [2021-10-13 07:18:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 499 [2021-10-13 07:18:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:32,666 INFO L354 Elim1Store]: treesize reduction 150, result has 14.8 percent of original size [2021-10-13 07:18:32,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 605 treesize of output 576 [2021-10-13 07:18:32,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 07:18:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730752618] [2021-10-13 07:18:32,739 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-10-13 07:18:32,739 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:18:32,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:18:32,750 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:18:32,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:18:32,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:18:32,791 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,794 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:18:32,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-13 07:18:32,797 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,798 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 07:18:32,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-13 07:18:32,804 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,805 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:18:32,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:18:32,809 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-13 07:18:32,815 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-13 07:18:32,817 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-13 07:18:32,820 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:18:32,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:32,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:18:32,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-10-13 07:18:32,845 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f824eb5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java: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 07:18:32,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:18:32,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-13 07:18:32,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798710189] [2021-10-13 07:18:32,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:18:32,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:18:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:18:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:18:32,850 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 07:18:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:18:32,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:33,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:33,066 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f824eb5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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 07:18:33,068 INFO L168 Benchmark]: Toolchain (without parser) took 7137.95 ms. Allocated memory was 104.9 MB in the beginning and 163.6 MB in the end (delta: 58.7 MB). Free memory was 66.0 MB in the beginning and 76.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 48.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:33,069 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 83.5 MB in the beginning and 83.5 MB in the end (delta: 71.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:33,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 644.05 ms. Allocated memory is still 104.9 MB. Free memory was 65.8 MB in the beginning and 71.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:33,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.07 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 68.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:33,070 INFO L168 Benchmark]: Boogie Preprocessor took 69.23 ms. Allocated memory is still 104.9 MB. Free memory was 68.9 MB in the beginning and 67.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:33,070 INFO L168 Benchmark]: RCFGBuilder took 1026.51 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 79.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:33,071 INFO L168 Benchmark]: TraceAbstraction took 5311.13 ms. Allocated memory was 104.9 MB in the beginning and 163.6 MB in the end (delta: 58.7 MB). Free memory was 78.8 MB in the beginning and 76.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 61.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:33,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory was 83.5 MB in the beginning and 83.5 MB in the end (delta: 71.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 644.05 ms. Allocated memory is still 104.9 MB. Free memory was 65.8 MB in the beginning and 71.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.07 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 68.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.23 ms. Allocated memory is still 104.9 MB. Free memory was 68.9 MB in the beginning and 67.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1026.51 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 79.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5311.13 ms. Allocated memory was 104.9 MB in the beginning and 163.6 MB in the end (delta: 58.7 MB). Free memory was 78.8 MB in the beginning and 76.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 61.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f824eb5 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f824eb5: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:18:33,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/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 07:18:35,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:18:35,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:18:35,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:18:35,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:18:35,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:18:35,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:18:35,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:18:35,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:18:35,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:18:35,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:18:35,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:18:35,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:18:35,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:18:35,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:18:35,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:18:35,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:18:35,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:18:35,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:18:35,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:18:35,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:18:35,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:18:35,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:18:35,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:18:35,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:18:35,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:18:35,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:18:35,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:18:35,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:18:35,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:18:35,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:18:35,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:18:35,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:18:35,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:18:35,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:18:35,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:18:35,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:18:35,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:18:35,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:18:35,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:18:35,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:18:35,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:18:35,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:18:35,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:18:35,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:18:35,725 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:18:35,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:18:35,725 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:18:35,725 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:18:35,725 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:18:35,726 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:18:35,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:18:35,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:18:35,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:18:35,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:18:35,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:18:35,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:18:35,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:18:35,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:18:35,730 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:18:35,730 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:18:35,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:18:35,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:18:35,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:18:35,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:18:35,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:18:35,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:18:35,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:18:35,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:35,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:18:35,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:18:35,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:18:35,733 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:18:35,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:35,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:18:35,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:18:35,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:18:35,734 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-10-13 07:18:36,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:18:36,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:18:36,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:18:36,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:18:36,145 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:18:36,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 07:18:36,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/b86cc0460/18c7a25fc7034db089a7c7fed8aef954/FLAGd91ed9da2 [2021-10-13 07:18:36,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:18:36,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-13 07:18:36,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/b86cc0460/18c7a25fc7034db089a7c7fed8aef954/FLAGd91ed9da2 [2021-10-13 07:18:37,060 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/data/b86cc0460/18c7a25fc7034db089a7c7fed8aef954 [2021-10-13 07:18:37,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:18:37,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:18:37,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:37,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:18:37,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:18:37,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3968ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37, skipping insertion in model container [2021-10-13 07:18:37,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:18:37,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:18:37,536 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 07:18:37,539 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 07:18:37,566 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 07:18:37,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:37,593 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:18:37,640 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-13 07:18:37,642 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-13 07:18:37,647 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_0b17fd2b-3515-4974-ad86-f17d588ca10d/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-13 07:18:37,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:18:37,684 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:18:37,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37 WrapperNode [2021-10-13 07:18:37,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:18:37,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:37,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:18:37,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:18:37,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:18:37,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:18:37,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:18:37,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:18:37,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:18:37,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:18:37,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:18:37,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:18:37,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (1/1) ... [2021-10-13 07:18:37,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:18:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:37,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:18:37,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:18:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:18:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:18:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:18:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:18:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:18:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:18:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:18:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:18:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:18:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:18:38,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:18:38,798 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:18:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:38 BoogieIcfgContainer [2021-10-13 07:18:38,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:18:38,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:18:38,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:18:38,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:18:38,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:37" (1/3) ... [2021-10-13 07:18:38,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0f32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:38, skipping insertion in model container [2021-10-13 07:18:38,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:37" (2/3) ... [2021-10-13 07:18:38,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0f32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:38, skipping insertion in model container [2021-10-13 07:18:38,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:38" (3/3) ... [2021-10-13 07:18:38,807 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-13 07:18:38,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:18:38,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:18:38,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:18:38,865 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 07:18:38,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:18:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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 07:18:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:18:38,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:38,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:38,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1808873062, now seen corresponding path program 1 times [2021-10-13 07:18:38,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:38,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260245749] [2021-10-13 07:18:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:38,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:38,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:38,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:18:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:18:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:39,095 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 07:18:39,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:39,119 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 07:18:39,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:39,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260245749] [2021-10-13 07:18:39,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260245749] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:39,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:39,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:18:39,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97740543] [2021-10-13 07:18:39,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:18:39,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:18:39,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:39,143 INFO L87 Difference]: Start difference. First operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 07:18:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:39,160 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2021-10-13 07:18:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:18:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-10-13 07:18:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:39,170 INFO L225 Difference]: With dead ends: 67 [2021-10-13 07:18:39,170 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:18:39,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:18:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:18:39,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 07:18:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 states have internal predecessors, (35), 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 07:18:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-13 07:18:39,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-10-13 07:18:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:39,204 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-13 07:18:39,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 07:18:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-13 07:18:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:18:39,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:39,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:39,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:39,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:39,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash 239687661, now seen corresponding path program 1 times [2021-10-13 07:18:39,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:39,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284135520] [2021-10-13 07:18:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:39,431 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:39,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:39,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:18:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:39,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:18:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:39,598 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 07:18:39,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:39,631 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 07:18:39,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:39,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284135520] [2021-10-13 07:18:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284135520] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:18:39,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:18:39,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:18:39,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132702607] [2021-10-13 07:18:39,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:18:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:18:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:18:39,637 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:39,917 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-10-13 07:18:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:18:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:39,919 INFO L225 Difference]: With dead ends: 54 [2021-10-13 07:18:39,920 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 07:18:39,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:18:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 07:18:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-13 07:18:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:18:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-13 07:18:39,929 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 8 [2021-10-13 07:18:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:39,929 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-13 07:18:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:18:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-13 07:18:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:18:39,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:39,931 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:39,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:18:40,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:18:40,143 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1200905122, now seen corresponding path program 1 times [2021-10-13 07:18:40,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:40,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445193946] [2021-10-13 07:18:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:40,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:40,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:40,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:40,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:18:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:18:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:40,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 07:18:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 07:18:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:40,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:40,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445193946] [2021-10-13 07:18:40,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445193946] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:40,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728131518] [2021-10-13 07:18:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:40,707 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:40,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:40,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:18:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:18:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:40,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 07:18:40,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 07:18:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:40,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1728131518] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:41,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861024876] [2021-10-13 07:18:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:41,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:41,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:41,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:18:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:18:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:41,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 07:18:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 07:18:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:41,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861024876] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:41,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:41,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2021-10-13 07:18:41,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760985148] [2021-10-13 07:18:41,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:18:41,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:18:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:18:41,390 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:18:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:42,121 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-13 07:18:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:18:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 13 [2021-10-13 07:18:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:42,123 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:18:42,123 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:18:42,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:18:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:18:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-13 07:18:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 07:18:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 07:18:42,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-10-13 07:18:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 07:18:42,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:18:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 07:18:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:18:42,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:42,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:42,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:42,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:42,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:42,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:42,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:18:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash 825424614, now seen corresponding path program 1 times [2021-10-13 07:18:42,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:42,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621171702] [2021-10-13 07:18:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:42,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:42,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:42,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:42,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:18:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:18:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:18:48,052 INFO L354 Elim1Store]: treesize reduction 328, result has 15.7 percent of original size [2021-10-13 07:18:48,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 136 [2021-10-13 07:18:48,100 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:18:48,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 169 [2021-10-13 07:18:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:52,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-10-13 07:18:54,635 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-13 07:18:54,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-13 07:18:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:54,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:57,457 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 07:18:57,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 189 [2021-10-13 07:19:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:19:00,796 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-10-13 07:19:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-10-13 07:19:01,515 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:19:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 52 [2021-10-13 07:19:03,271 INFO L354 Elim1Store]: treesize reduction 96, result has 70.9 percent of original size [2021-10-13 07:19:03,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 304 treesize of output 431 [2021-10-13 07:19:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:27,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:27,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621171702] [2021-10-13 07:19:27,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621171702] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:27,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976167471] [2021-10-13 07:19:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:27,687 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:27,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:27,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:19:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:19:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:28,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:19:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:19:28,305 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 07:19:28,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-10-13 07:19:28,319 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:19:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2021-10-13 07:19:28,562 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 07:19:28,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-13 07:19:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:28,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:31,084 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 07:19:31,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 189 [2021-10-13 07:19:35,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:19:36,063 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-10-13 07:19:36,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-10-13 07:19:36,412 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-10-13 07:19:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 100 [2021-10-13 07:19:37,446 INFO L354 Elim1Store]: treesize reduction 58, result has 73.6 percent of original size [2021-10-13 07:19:37,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 175 treesize of output 286 [2021-10-13 07:19:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:46,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976167471] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:46,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429275330] [2021-10-13 07:19:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:46,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:46,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:46,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:46,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:19:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:19:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:46,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:19:50,894 INFO L354 Elim1Store]: treesize reduction 333, result has 14.4 percent of original size [2021-10-13 07:19:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2021-10-13 07:19:50,908 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:19:50,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 161 [2021-10-13 07:19:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:19:51,635 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-10-13 07:19:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 35 [2021-10-13 07:19:51,766 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-13 07:19:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-13 07:19:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:51,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:54,645 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 07:19:54,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 151 treesize of output 190 [2021-10-13 07:20:01,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:01,441 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 07:20:01,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 53 [2021-10-13 07:20:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:01,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:01,716 INFO L354 Elim1Store]: treesize reduction 11, result has 76.1 percent of original size [2021-10-13 07:20:01,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 78 [2021-10-13 07:20:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:02,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:02,574 INFO L244 Elim1Store]: Index analysis took 651 ms [2021-10-13 07:20:02,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:02,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 48 [2021-10-13 07:20:04,576 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:20:04,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 31 [2021-10-13 07:20:04,658 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:04,758 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:04,770 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:04,837 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:04,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:20:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-10-13 07:20:04,896 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:04,904 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 07:20:05,793 INFO L354 Elim1Store]: treesize reduction 52, result has 81.0 percent of original size [2021-10-13 07:20:05,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 247 treesize of output 378 [2021-10-13 07:20:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:16,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429275330] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:16,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:20:16,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 15 [2021-10-13 07:20:16,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719049326] [2021-10-13 07:20:16,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 07:20:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 07:20:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:20:16,309 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:20:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:22,621 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2021-10-13 07:20:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:20:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:20:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:22,625 INFO L225 Difference]: With dead ends: 108 [2021-10-13 07:20:22,625 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 07:20:22,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 745.8ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-10-13 07:20:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 07:20:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 43. [2021-10-13 07:20:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 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 07:20:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-10-13 07:20:22,637 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 18 [2021-10-13 07:20:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:22,637 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-10-13 07:20:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:20:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-10-13 07:20:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:20:22,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:22,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:20:22,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:22,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 07:20:23,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:23,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:20:23,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:20:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1505482984, now seen corresponding path program 1 times [2021-10-13 07:20:23,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:23,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054120127] [2021-10-13 07:20:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:20:23,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:23,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:20:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:20:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:20:23,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 07:20:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-13 07:20:23,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:23,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2021-10-13 07:20:23,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:23,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-13 07:20:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-10-13 07:20:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-10-13 07:20:23,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:23,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 07:20:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:20:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:23,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:23,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:20:23,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:23,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 07:20:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:20:24,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:24,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054120127] [2021-10-13 07:20:24,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054120127] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:20:24,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:20:24,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:20:24,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603873953] [2021-10-13 07:20:24,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:20:24,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:24,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:20:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:20:24,091 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 07:20:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:25,708 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-10-13 07:20:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:20:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 18 [2021-10-13 07:20:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:25,709 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:20:25,709 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 07:20:25,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:20:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 07:20:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-10-13 07:20:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 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 07:20:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-10-13 07:20:25,718 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 18 [2021-10-13 07:20:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:25,718 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-10-13 07:20:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 07:20:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-10-13 07:20:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:20:25,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:25,720 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:20:25,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 07:20:25,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:20:25,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:20:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1413183039, now seen corresponding path program 2 times [2021-10-13 07:20:25,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:25,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953615403] [2021-10-13 07:20:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:20:25,936 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:25,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:25,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:20:26,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:20:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:20:26,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:20:26,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:20:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:26,892 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-13 07:20:26,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 113 [2021-10-13 07:20:26,895 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:26,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-13 07:20:26,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:26,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-10-13 07:20:26,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:26,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-13 07:20:26,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:26,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:26,995 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-10-13 07:20:26,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 114 [2021-10-13 07:20:27,008 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:20:27,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 93 [2021-10-13 07:20:27,011 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:20:27,308 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-13 07:20:27,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 86 [2021-10-13 07:20:27,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:27,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:20:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:27,341 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-10-13 07:20:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 07:20:27,453 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:20:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 71 [2021-10-13 07:20:27,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:27,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:20:28,446 INFO L354 Elim1Store]: treesize reduction 187, result has 17.3 percent of original size [2021-10-13 07:20:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 53 [2021-10-13 07:20:28,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:28,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:20:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 07:20:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 07:20:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:20:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:28,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2021-10-13 07:20:28,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-10-13 07:20:28,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:28,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 07:20:28,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:28,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-10-13 07:20:32,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:32,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-13 07:20:32,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:32,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-13 07:20:34,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_82 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_12) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_82 v_DerPreprocessor_10) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_82) v_DerPreprocessor_9))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv1 32))) is different from false [2021-10-13 07:20:36,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_82 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset v_DerPreprocessor_12) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)) v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_82 v_DerPreprocessor_10) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_82) v_DerPreprocessor_9))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))) (_ bv1 32))) is different from false [2021-10-13 07:20:49,628 WARN L207 SmtUtils]: Spent 13.20 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-10-13 07:20:49,629 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-13 07:20:49,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 429 treesize of output 468 [2021-10-13 07:20:49,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:49,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953615403] [2021-10-13 07:20:49,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 07:20:49,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079590080] [2021-10-13 07:20:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:20:49,636 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:20:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:20:49,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:20:49,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:20:50,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:20:50,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:20:50,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3ed58dfd [2021-10-13 07:20:50,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229792820] [2021-10-13 07:20:50,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:20:50,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:20:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:20:50,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:20:50,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:20:50,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:20:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:20:50,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3ed58dfd [2021-10-13 07:20:50,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:20:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:20:50,917 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:20:50,917 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:20:50,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:20:50,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:20:50,926 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:20:50,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:51,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:51,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:51,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:20:51,558 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:20:51,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:20:51 BoogieIcfgContainer [2021-10-13 07:20:51,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:20:51,581 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:20:51,581 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:20:51,581 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:20:51,582 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:38" (3/4) ... [2021-10-13 07:20:51,585 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:20:51,586 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:20:51,587 INFO L168 Benchmark]: Toolchain (without parser) took 134520.88 ms. Allocated memory was 75.5 MB in the beginning and 148.9 MB in the end (delta: 73.4 MB). Free memory was 55.6 MB in the beginning and 43.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 84.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,587 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:20:51,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.78 ms. Allocated memory is still 75.5 MB. Free memory was 55.5 MB in the beginning and 50.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.89 ms. Allocated memory is still 75.5 MB. Free memory was 50.8 MB in the beginning and 48.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,589 INFO L168 Benchmark]: Boogie Preprocessor took 52.70 ms. Allocated memory is still 75.5 MB. Free memory was 48.4 MB in the beginning and 46.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,589 INFO L168 Benchmark]: RCFGBuilder took 1008.09 ms. Allocated memory is still 75.5 MB. Free memory was 46.6 MB in the beginning and 53.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,590 INFO L168 Benchmark]: TraceAbstraction took 132778.03 ms. Allocated memory was 75.5 MB in the beginning and 148.9 MB in the end (delta: 73.4 MB). Free memory was 53.1 MB in the beginning and 44.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 81.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,590 INFO L168 Benchmark]: Witness Printer took 4.83 ms. Allocated memory is still 148.9 MB. Free memory was 44.4 MB in the beginning and 43.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:20:51,594 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 616.78 ms. Allocated memory is still 75.5 MB. Free memory was 55.5 MB in the beginning and 50.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.89 ms. Allocated memory is still 75.5 MB. Free memory was 50.8 MB in the beginning and 48.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.70 ms. Allocated memory is still 75.5 MB. Free memory was 48.4 MB in the beginning and 46.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1008.09 ms. Allocated memory is still 75.5 MB. Free memory was 46.6 MB in the beginning and 53.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 132778.03 ms. Allocated memory was 75.5 MB in the beginning and 148.9 MB in the end (delta: 73.4 MB). Free memory was 53.1 MB in the beginning and 44.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 81.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.83 ms. Allocated memory is still 148.9 MB. Free memory was 44.4 MB in the beginning and 43.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 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 - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L996] DLL* head = malloc(sizeof(DLL)); [L997] head->next = ((void*)0) [L998] head->prev = ((void*)0) [L999] head->data = 0 [L1001] DLL* x = head; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x = head [L1008] EXPR x->next [L1008] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1013] COND FALSE !(!(x != ((void*)0))) [L1015] x->data = 1 [L1017] EXPR x->next [L1017] COND TRUE x->next == ((void*)0) [L1019] x->next = malloc(sizeof(DLL)) [L1019] EXPR x->next [L1019] x->next->prev = x [L1019] EXPR x->next [L1019] x = x->next [L1019] x->next = ((void*)0) [L1019] x->data = 2 [L1025] DLL* prev = ((void*)0); [L1026] x = head [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND FALSE !(x != ((void*)0)) [L1039] head = prev [L1042] x = head [L1043] COND TRUE x != ((void*)0) [L1045] EXPR x->data [L1045] int t1 = x->data; [L1046] int t2 = 0; [L1047] COND TRUE t1 == 2 [L1048] EXPR x->next [L1048] EXPR x->next->data [L1048] t2 = x->next->data [L1049] COND TRUE !(t1 != 2 || t2 == 1) [L1049] reach_error() - UnprovableResult [Line: 1010]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 132699.8ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 12.7ms, AutomataDifference: 9000.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 136 SDtfs, 269 SDslu, 234 SDs, 0 SdLazy, 343 SolverSat, 115 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 8057.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 249 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1060.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 79 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 121.1ms SsaConstructionTime, 441.6ms SatisfiabilityAnalysisTime, 94428.2ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 31 QuantifiedInterpolants, 3750 SizeOfPredicates, 35 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 8/20 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 could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:20:51,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17fd2b-3515-4974-ad86-f17d588ca10d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...